Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: p2pAmps on August 04, 2015, 07:43:33 am
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I thought i would share my Princeton Reverb build that I am working on. I still have a ways to go as I am waiting on a few more parts to arrive. I am pretty excited to hear this bad-boy and A/B it next to my friends 65 PR.
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd59cfb09f9560c73c2455/1459444176974/1.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd59cf2b8dde5d7d1480cb/1459444176956/2.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd59d0b09f9560c73c2458/1459444179717/3.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd59d02b8dde5d7d1480cd/1459444177397/4.jpg?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd59d02b8dde5d7d1480d0/1459444179466/5.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd59d0b09f9560c73c245b/1459444177594/6.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd59d02b8dde5d7d1480d3/1459444179525/7.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd59d0b09f9560c73c245d/1459444178037/8.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd59d12b8dde5d7d1480d5/1459444178885/9.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd59d1b09f9560c73c245f/1459444178643/10.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd59d1b09f9560c73c2461/1459444178601/11.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd59d12b8dde5d7d1480d8/1459444179793/12.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd59d1b09f9560c73c2467/1459444181122/13.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd59d12b8dde5d7d1480da/1459444179079/14.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd59d2b09f9560c73c246a/1459444179111/15.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd59d22b8dde5d7d1480dc/1459444179195/16.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd59d540261d3687229525/1459444183142/17.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd59d8d51cd4972206aff6/1459444185941/18.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd59e340261d36872295c3/1459444196642/19.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd59e32b8dde5d7d14817f/1459444196692/20.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd59e440261d36872295c5/1459444198729/21.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd59e407eaa05045311eb0/1459444198177/22.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd59f807eaa05045311f59/1459444218803/23.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd5a1107eaa05045312032/1459444244108/24.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd5a122b8dde5d7d148310/1459444243743/25.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd5a132b8dde5d7d148316/1459444244501/26.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd5a27d51cd4972206b245/1459444271087/32.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd5a3ce707eb0e962f03cb/1459444285911/33.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd5a3cd51cd4972206b312/1459444286370/34.JPG?format=1000w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fd593740261d3687228f54/56fd5a66d51cd4972206b4ba/1459444327570/42.JPG?format=1000w)
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Nice start. Hope to see some updates.
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Nice start. Hope to see some updates.
Thanks Sluckey. I am waiting on a few key things to move on. I kinda was thinking if I should pull the wires off the turrets and solder them underneath for a super clean look? Any thoughts to that?
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I would not do that. One bad connection on an underboard jumper will ruin your day! And your super clean look! You likely won't find it until you power up.
I don't like underboard jumpers but sometimes you cannot avoid them. When I do underboard jumpers I like to do them like this pic. Then I don't have to wonder if the jumper will fall out of the turret when I add components later. I highly recommend this technique.
(http://home.comcast.net/~seluckey/amps/VAC15/underboard_jumper.jpg)
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I would not do that. One bad connection on an underboard jumper will ruin your day! And your super clean look! You likely won't find it until you power up.
I don't like underboard jumpers but sometimes you cannot avoid them. When I do underboard jumpers I like to do them like this pic. Then I don't have to wonder if the jumper will fall out of the turret when I add components later. I highly recommend this technique.
(http://home.comcast.net/~seluckey/amps/VAC15/underboard_jumper.jpg)
Great tip and makes complete sense. I am not so far along that I can't make mine like yours, thank you
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Here are a few updated pics
http://www.p2pamps.com/pr1/ (http://www.p2pamps.com/pr1/)
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Looking good Mike
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Looking good Mike
That means a lot to me Doug, thank you
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Really nice looking build.
I had some noise problems on my Princeton Reverb builds. Shielded cable to and from reverb pot helped, along with keeping tremolo wires away from everything else. Don't do anything different until you start playing. I'm just relaying my experience.
Cheers,
Chip
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Really nice looking build.
I had some noise problems on my Princeton Reverb builds. Shielded cable to and from reverb pot helped, along with keeping tremolo wires away from everything else. Don't do anything different until you start playing. I'm just relaying my experience.
Cheers,
Chip
Thanks Chip. This is my first PR so I will be learning a few things along the way. Thank you for the tips.
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Holy Smokes is that super clean. Lock-tite as well, what made you pick the WGS speaker? I have a older out of production one I like as well. Thanks for the tip with shielded cable to reverb pot and tremolo wire path. Can't wait for more pics
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Holy Smokes is that super clean. Lock-tite as well, what made you pick the WGS speaker? I have a older out of production one I like as well. Thanks for the tip with shielded cable to reverb pot and tremolo wire path. Can't wait for more pics
You know I thought i would start with the WGS speaker since I already had one. I have a few others too to try, thats part of the journey for me. I'm also going to start out with some Juniper caps and see how they do... Thanks for the note
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:huh: Jupiter Caps, straight to the top shelf I see. I don't know how many are on your circuit but that's a easy buck fifty with shipping I bet
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:huh: Jupiter Caps, straight to the top shelf I see. I don't know how many are on your circuit but that's a easy buck fifty with shipping I bet
Nah, not that much. I use Mylars on the trem circuit. The Junipers are around 5/6 bucks each... Come on Doug, get us some so we can buy from you :)
The signal caps needed for a PR:
3 x .1
1 x .05 (=.047)
2 x .02
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That's not bad for their yellow mylars, the red "astrons" are $$. I see they have speakers as well now? I'm gonna have t look into their reviews, I'd buy jupiters if you stocked them Doug
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The Junipers are around 5/6 bucks each... Come on Doug, get us some so we can buy from you :)
Where are you buying these?
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The Junipers are around 5/6 bucks each... Come on Doug, get us some so we can buy from you :)
Where are you buying these?
http://vintagefenderamprepair.com/maintenance/signal-cap-upgrades/jupiter-vintage-tone-premium-caps/jupiter-signal-caps-singles/ (http://vintagefenderamprepair.com/maintenance/signal-cap-upgrades/jupiter-vintage-tone-premium-caps/jupiter-signal-caps-singles/)
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I see they have a red astron and a yellow vintage tone cap
http://jupitercondenser.com/product-category/capacitors/ (http://jupitercondenser.com/product-category/capacitors/)
I don't mind stocking them
looks like the red astrons are really expensive
You guys interested in just the yellow ones?
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I see they have a red astron and a yellow vintage tone cap
http://jupitercondenser.com/product-category/capacitors/ (http://jupitercondenser.com/product-category/capacitors/)
I don't mind stocking them
looks like the red astrons are really expensive
You guys interested in just the yellow ones?
I would probably use more yellows than reds. I would buy from you 100% when needed Doug... I have all but left Mojo to be honest. Your parts are just better quality
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I'll inquire with them and see about dealer pricing
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Nice work. Did you get the faceplate from Dr Tube? If you don't mind me asking where and also how much coin?
She might be a little woofey with that ceramic speaker, but I'll bet you know just what to do. I can tell this ain't your first rodeo. :icon_biggrin:
I have a huge stockpile of Caps. Doubt I would be buying any Jupiters Doug, but I would think some would like to try them. A load of guys are using them and I have seen the Red ones in a lot of Tweed Clones.
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Nice work. Did you get the faceplate from Dr Tube? If you don't mind me asking where and also how much coin?
She might be a little woofey with that ceramic speaker, but I'll bet you know just what to do. I can tell this ain't your first rodeo. :icon_biggrin:
I have a huge stockpile of Caps. Doubt I would be buying any Jupiters Doug, but I would think some would like to try them. A load of guys are using them and I have seen the Red ones in a lot of Tweed Clones.
The faceplate was an ebay buy and the backplate including the brass ground plate in front of the pots came from a guy in Thailand named Songwut. His email is noojwut@yahoo.com I think I have about 150.00 in all... Little high but I really wanted it since its going to be my personal amp. Cabinet came from Mather (1st class)... I kinda discovered Hoffman along the way and now I'm sold 100%.
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Nice work. Did you get the faceplate from Dr Tube? If you don't mind me asking where and also how much coin?
She might be a little woofey with that ceramic speaker, but I'll bet you know just what to do. I can tell this ain't your first rodeo. :icon_biggrin:
I have a huge stockpile of Caps. Doubt I would be buying any Jupiters Doug, but I would think some would like to try them. A load of guys are using them and I have seen the Red ones in a lot of Tweed Clones.
Also Ed, you're right, this ain't my first rodeo but I still have tons to learn and am humbled daily by the large number of good tube amp guys.
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Yes, and what is nice about the Forum here is I have yet to work on anything that Sluckey and or PRR cannot help with. I mean anything, even a tractor blower motor switch. :laugh:
But with amps, my God, if you think it someone can tell you how to do it. BWT, I love the Princeton Reverb. I use a Dual amp setup and for small places I use a 2, 10 Princeton Reverb and the Head version of the AC15 that Sluckey revised the layout. 2 Great sounding low watt amps. Plenty loud for me and I actually get to turn them up to their sweet spots.
Rock on!
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Id buy the yellow ones for my next build, those red ones are 2xs the price as the red ones
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Thanks for the feedback
I emailed Jupiter and inquired about becoming a dealer
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--- going to ground
Y on cap going to A on the board, pin 8 on the rectifier, Y to the OT
First, is this right?
Yes, that's right.
Next does it really matter where O,U, and X on the cap go on the board B,C,D?
No.
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--- going to ground
Y on cap going to A on the board, pin 8 on the rectifier, Y to the OT
First, is this right?
Yes, that's right.
Next does it really matter where O,U, and X on the cap go on the board B,C,D?
No.
Thank you Sluckey... I hate it when I second guess myself... Getting really close now
(http://p2pamps.com/pr/27.jpg)
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I see they have a red astron and a yellow vintage tone cap
looks like the red astrons are really expensive
Yes, VERY!
But I think they are going after the vintage 'look' with them? For the 'vintage' guys who have to replace an old Fender tweed coupling cap or 2, or 3, or.... they are the closets look. The yellows they have made for them, I think.... are the same cap internally, but are just 'tape wrapped' no molded shell.
I just bought a few of the astron 'clones' yellows and reds @ .02 to test in a Champ against SoZo yellows/blues, Mallorie's 150's and Orange drops 715 and 415(?) the OD caps Tubenit uses.
I think...... that the only difference between the yellow/red astron 'clones' is that the reds have a molded exterior shell, like the old Fender BF blue caps????? I think... the yellow/red astron 'clones' are both film/foil, as are the SoZo's, as apposed to metalized polyprop's, no foil.
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I would not do that. One bad connection on an underboard jumper will ruin your day! And your super clean look! You likely won't find it until you power up.
I don't like underboard jumpers but sometimes you cannot avoid them. When I do underboard jumpers I like to do them like this pic. Then I don't have to wonder if the jumper will fall out of the turret when I add components later. I highly recommend this technique.
(http://home.comcast.net/~seluckey/amps/VAC15/underboard_jumper.jpg)
That is a great tip. I have struggled with jumpers.
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Looks terrific, very nice work!
Excellent pix, too. Eagerly awaiting the A/B vs the '65 PR!
The only thing I would do differently is on your e-cap, generally I like to have ground connnections *under* the B+ wires. Or, I might slip a piece of ins tubing over the B+ wire (to prevent abrasion) if you want to use the bare ground wire to keep the B+ wire close to the chassis. That's about 1/57th of one nit I could pick on your excellent work.
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Looks terrific, very nice work!
Excellent pix, too. Eagerly awaiting the A/B vs the '65 PR!
The only thing I would do differently is on your e-cap, generally I like to have ground connections *under* the B+ wires. Or, I might slip a piece of ins tubing over the B+ wire (to prevent abrasion) if you want to use the bare ground wire to keep the B+ wire close to the chassis. That's about 1/57th of one nit I could pick on your excellent work.
Thanks so much, and yes I am waiting patiently myself to A/B with the 65. It's killin me LOL
It's funny what you said about that ground wire as I saw that and changed it right before your post! Good times
(http://p2pamps.com/pr/38.jpg)
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I uploaded a new PR PDF file this morning.
The power supply page still showed 22uf x 4 for the caps
The new PDf shows 40x20x20x20
http://el34world.com/Hoffman/files/Hoffman_PrincetonReverb.pdf (http://el34world.com/Hoffman/files/Hoffman_PrincetonReverb.pdf)
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I uploaded a new PR PDF file this morning.
The power supply page still showed 22uf x 4 for the caps
The new PDf shows 40x20x20x20
http://el34world.com/Hoffman/files/Hoffman_PrincetonReverb.pdf (http://el34world.com/Hoffman/files/Hoffman_PrincetonReverb.pdf)
Thanks Doug. I also noticed on that layout that the PT blue and brown were reversed... I used brown on pin 3 on V6 and blue on pin 3 V5.
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That would depend on the OT transformer you used
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I used brown on pin 3 on V6 and blue on pin 3 V5.
There is usually a 50/50 chance you'll need to reverse the brown and blue wires since this amp uses NFB.
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That would depend on the OT transformer you used
I am using a Classic Tone Deluxe Reverb output tranny:
"Fender Style 20W Output Transformer 4/8 ohm 40-18038"
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I was using a different brand and so my hookup was different than yours
Like Steve said, it's a 50/50 dice roll
It's just one of the things that you adjust when firing up an amp for the first time
I never cut the the OT wires going to the power tubes until I know which way is correct
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I was using a different brand and so my hookup was different than yours
Like Steve said, it's a 50/50 dice roll
It's just one of the things that you adjust when firing up an amp for the first time
I never cut the the OT wires going to the power tubes until I know which way is correct
I'll hold my ears LOL....
So is there a way to test before hand so I get it right? Or is this just like you said, fire it and see what happens?
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You fire it up after doing all the voltage checks, etc
Set the volume on low and you know right away
If you are using the same OT for multiple builds, then you already know which way is the correct way
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You fire it up after doing all the voltage checks, etc
Set the volume on low and you know right away
(http://proguitarshop.com/media/cms/blog/holdingears.jpg)
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You fire it up after doing all the voltage checks, etc
Set the volume on low and you know right away
If you are using the same OT for multiple builds, then you already know which way is the correct way
IIRC another approach is to leave the negative feedback disconnected for initial power-up. That way you can check voltages, etc. before worrying about the output transformer leads.
Cheers,
Chip
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> leave the negative feedback disconnected for initial power-up.
+1
Also, when the amp works no-NFB, you can then *tap* the NFB wire to where it should go. If the small hum gets smaller, that's correct. If it HOWLS, it is probably not correct. And with the "tap" you can un-NFB it instantly, instead of suffering while you wait for the power to bleed down.
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I thought i would share my Princeton Reverb build that I am working on. ... I am pretty excited to hear this bad-boy and A/B it next to my friends 65 PR.
Looking great!!
I'm somewhat partial to the blackface Princeton Reverb, as that was my first good tube amp. I've had a number of black- and silver-face Princetons over the years.
I'd suggest you not completely judge your work until you also hear your amp through the old Jensen in your friend's amp. Hopefuly the speaker cord/plug will reach when your two amps are back-to-back.
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Well I finally got my caps in and fired her up this morning. Sure enough the blue and brown in the OT were backwards. Quick change up and 2nd fire. Set the bias around 27mA.
(http://p2pamps.com/pr/39.jpg)
(http://p2pamps.com/pr/40.jpg)
(http://p2pamps.com/pr/41.jpg)
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Sound check
WOOT WOOT
https://www.youtube.com/watch?v=3mb3ig0S11U&feature=youtu.be (https://www.youtube.com/watch?v=3mb3ig0S11U&feature=youtu.be)
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Sounds great Mike
I guess you nailed down the reverb issue
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Sounds great Mike
I guess you nailed down the reverb issue
Yeah, really dumb mistake, plugged in backwards LOL... some kids I swear
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Sounds perfect! And the cab, grill cloth, faceplates, etc look so spot-on it's a near-forgery! :icon_biggrin:
Really great job!
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Yeah, really dumb mistake, plugged in backwards LOL... some kids I swear
:laugh: Can happen to the best of them.
Really, really, nice looking build! :bravo1:
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All right, now wait a second here, I just listened to your clip.
WHO ARE YOU? AND WHERE DO YOU LIVE? LA? Nashville? NO? NY?
You are definitely a high level pro player. Your covering a LOT of musical style bases there.
Are you a studio cat? Out on the road? Your not just playin out at the local pub every other month.
Man you can play, I'd love to hear you stretch out on a few different styles with a nice sized band. :blob8:
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All right, now wait a second here, I just listened to your clip.
WHO ARE YOU? AND WHERE DO YOU LIVE? LA? Nashville? NO? NY?
:l2: He lives near Nashville, in a smallish town I used to live in up to 2000.
I can get around on the guitar, but every now & then someone would ask me in a bar in Nashville, "Hey man, do you play?" And I said, "Yep. I play the stereo..."
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Overall, great job on assembling my PR board
I'll put a link to this thread on my PR turret board thread
Just to show guys that it can be assembled and work right off the bat
(well, you had just a couple minor issues)
But you went back over it and found them right away
Not trying to get down on anyone, but I see some guys doing builds here that just keep posting over and over again about the amp not working
It seems they are not able to go back over their work and find the problem
Let this be an example of how it is done properly
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I can get around on the guitar, but every now & then someone would ask me in a bar in Nashville, "Hey man, do you play?" And I said, "Yep. I play the stereo..."
All I can play in is mono. :laugh:
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Overall, great job on assembling my PR board
I'll put a link to this thread on my PR turret board thread
Just to show guys that it can be assembled and work right off the bat
(well, you had just a couple minor issues)
But you went back over it and found them right away
Not trying to get down on anyone, but I see some guys doing builds here that just keep posting over and over again about the amp not working
It seems they are not able to go back over their work and find the problem
Let this be an example of how it is done properly
Honored you would say that Doug
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All right, now wait a second here, I just listened to your clip.
WHO ARE YOU? AND WHERE DO YOU LIVE? LA? Nashville? NO? NY?
You are definitely a high level pro player. Your covering a LOT of musical style bases there.
Are you a studio cat? Out on the road? Your not just playin out at the local pub every other month.
Man you can play, I'd love to hear you stretch out on a few different styles with a nice sized band. :blob8:
Ha! I'm a nobody man. Name is Mike Scaggs and I am from Murfreesboro Tn, about 40 minutes south of downtown Nashville. Born and raised in Sacramento, CA and moved here 10 years ago for good this time. I toured with some artists in the mid 90s but found I liked being home with the family better. I have been a cyber security guy now for 19 years and play music at church now. Been doing sessions since I was 21, 54 now. Too many to list both good, bad, and really bad LOL... I love guitars, amps, pedals, Harleys, woodshopin, and the lord.
That about sums up me... Glad to be here
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Well, I don't know what I'm more jealous of, your playing ability or building ability. So I'll just take both for $400, Alex. Cheers!
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:worthy1:
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I toured with some artists in the mid 90s but found I liked being home with the family better. I have been a cyber security guy now for 19 years and play music at church now.
Home and family are better. :icon_biggrin:
I started to get chances/offers to go out on the road for 2 to 3 months at a time. Turned them down. I almost moved to NOLA.
I was in my mid to late 40's, if it would have happened earlier, 30's, I probably would have jumped at it. :laugh:
(I ended up playing in church for some years. Was a very good decision for me.)
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Thanks to each person who showed interest in my PR build. Guys, if you're on the fence on one of Doug's PR don't hesitate. The schematic and layout is good and easy to follow. Take your time and enjoy the ride, its a great project you will have for years to come.
And here she is all done and dialed in... woot woot!
(http://p2pamps.com/pr/42.jpg)
https://www.youtube.com/watch?v=jByGobiixBY&feature=youtu.be (https://www.youtube.com/watch?v=jByGobiixBY&feature=youtu.be)
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:bravo1:
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sounds superb. that's one to be very proud of Mike.
:icon_biggrin:
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:bravo1:
+1 Very nice!
Cheers,
Chip
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so,.... the tremolo was a little weak in my mind on this build. thanks to STUCKEY's great advise, I swapped out a 1M resistor for a 470K in the tremolo circuit and all the sudden I had magic! Now I'm stuck on PR tremolo...
Thank you Mr Stuckey
(http://p2pamps.com/pr/1m.jpg)
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Nice, the forum boys come through again
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Sluckey's got a way with trems for sure. :icon_biggrin:
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Slucky's gotten outta a jam or three. How's that WGS sounding? Apparently the one I have is a 2007 vintage 12". They now call the The Veteran, can't wait to here it. I think Dougs PR is my next build, I have a 290cax Hammond in box still and will look to see if that will work
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Slucky's gotten outta a jam or three. How's that WGS sounding? Apparently the one I have is a 2007 vintage 12". They now call the The Veteran, can't wait to here it. I think Dougs PR is my next build, I have a 290cax Hammond in box still and will look to see if that will work
You know what, that WGS sounds really nice man. I have 4 others to try but hey, I might just keep this one in there.
Don't hesitate on building Doug's PR. It's such a clean layout and sounds freakin amazing, I mean it. You can do it so just get started. My cab came from Mather. 3 week turn around. I added the relic-ed grill for 25 bucks and glad I did. Life is short so go get ya some...
Cheers
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I love happy endings :icon_biggrin:
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My cab for the 5G9 is being lacquered as I write, Mergili is making mine. I just started getting the dust off my tools. I switched jobs and I have to rebuild my work bench at my new shop
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very nice work mike.
did you ever wire in the mid control in the rear?
--pete
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very nice work mike.
did you ever wire in the mid control in the rear?
--pete
Thanks a lot...
I did solder up the mid pot. I'm starting with a 10K and going to increase it till I find the sweet spot...
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Great build and very nice chord vocabulary. I picked up an idea from around 1:30 sliding in and out. What a great sound, a Well played Les Paul and one heck of a clone.
I like a mid pot myself. Good stuff, thanks!
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Was the mid pot in the layout or schematics somewhere? I remember, I think seeng it
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Was the mid pot in the layout or schematics somewhere? I remember, I think seeng it
No, the mid pot is not on the schematic or layout but is very easy to add on. I used the hole where the ground switch would have been and ran a wire over to the bass pot from there. You remove the 6.8k resistor from the left lug on the Bass pot and connect your mid pot there. You will need to ground you mid pot too. The mid pot basically becomes a rheostat. I started with a 10K pot and get 6.8K around 3 o'clock. I plan to play around with the pot values to see what I get out of it. Some good tech on the forum have suggested a 50K which I plan to try out.
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Now I remember, when I was thinking about building Dougs AB763 that's where I saw the mid pot. Looks like it can be followed the same way
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Well today is the big Hoffman PR / 65 PR shootout. We are going to set these side by side and see what we got. My dear friend and top session guy in town will be very critical so I'm holding my breath. I think the Hoffman is going to WIN! More to come....
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Blind fold him during the test and swap amps arounds
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There's a local "summer jazz camp" here, conducted at a nearby school. I think they have about 200-250 kids come in, and there are very strong local musicians who teach 1-week classes. To cover all the amps they need, they borrow lots of amps and drum kits and keyboards from all the local schools.
One or two years ago, a school amp came in and it was a BF Princeton Reverb, maybe 1966-1967 in absolutely museum-grade condition. I was stunned that a "school" amp would be in such good shape. I have to tell you it was all I could do to not walk out with thing. I should have offered three new Fender SS amps in trade.
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Well, the shootout went well. We compare the Hoffman build to a Vintage Sound 15 as well.
The Hoffman was more punchy than both the 65 and the Vintage Sound. The Vintage Sound 15 was very hifi sounding probably due to all the orange drops they use. Not saying it sounded bad, just sounded hifi... The 65 did break up faster than the Hoffman which may be due to the speaker and the fact that the I used a Deluxe OT in my build. The guitar used on this clip was a 61 335
It was the opinion of 5 top session guys that the Hoffman PR won! I was pretty dang excited.
Here is a little clip. My camera work sucks ... The 65 is on the right, my build on the left.
! No longer available (http://www.youtube.com/watch?v=KAvbpjxDrxE#)
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so,.... the tremolo was a little weak in my mind on this build. thanks to STUCKEY's great advise, I swapped out a 1M resistor for a 470K in the tremolo circuit and all the sudden I had magic! Now I'm stuck on PR tremolo...
Thank you Mr Stuckey
Congrats for this build! And your playing as well!
As for the Trem, I actually even reduce that 1M resistor down to 220K! It's much more useable!
Have fun, the PR is on my top-5-amps list!
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I meant to ask, did you listen to the amp before the Jupiter caps were installed. I would like to know you opinion of the difference.
Respectfully,
Ed
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I meant to ask, did you listen to the amp before the Jupiter caps were installed. I would like to know you opinion of the difference.
Respectfully,
Ed
Hi Ed,
The truth is no, I just soldered them in and fired the amp. It sounds so good I cringe at the thought of changing anything now LOL...
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What happened to the video clip? Can you repost
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What happened to the video clip? Can you repost
The videos I have are on this thread...
:guitar1
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What happened to the video clip? Can you repost
Link still works despite label.
Chip
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Here is a little something I played on with the PR I built to give you an idea what it sounds like with pedals and a 57 mic. I played all the parts on this cut with a 85 LesPaul too...
https://www.youtube.com/watch?v=Lpty3_yYMDA (https://www.youtube.com/watch?v=Lpty3_yYMDA)
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Oh man!!!!! :blob8:
That sure don't sound like no PR! Sounds like a tweed Bassman or a Marshall half stack. WOW!
What pedals? :undecided:
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Oh man!!!!! :blob8:
That sure don't sound like no PR! Sounds like a tweed Bassman or a Marshall half stack. WOW!
What pedals? :undecided:
I was using an old Nobels ODR-1 ....
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I was using an old Nobels ODR-1 ....
Sounds great. :icon_biggrin:
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That sounds great!
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That sounds great!
Aweee man, thanks Doug... Same ole tired licks and one chop LOL
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Does a Strat sound good through that pedal? :dontknow:
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Does a Strat sound good through that pedal? :dontknow:
I think everything sounds great through an ODR-1
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Ok, thanks. :icon_biggrin:
I'm gonna talk with Jojo about it, he builds a lot of pedals.
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Wow! Not only a great looking and great sounding amp, but holy cats your playing is phenomenal! Really shows it off. Great job on all fronts! You did all the parts in that recording? :worthy1:
Jim
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Wow! Not only a great looking and great sounding amp, but holy cats your playing is phenomenal! Really shows it off. Great job on all fronts! You did all the parts in that recording? :worthy1:
Jim
Thank you Jim... Well, I did all the guitar parts. I think I did 3 tracks on this one...
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I finally caught up, re-read the thread, and watched the vids. Love Snake Bite's words too not just the playing, tone, & production which were also really nice and something to be proud of. Just curious on the odr-1 is it an early or recent model (not that it matters much) and if you've seen/played the newer one with a gain switch mod also?
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I finally caught up, re-read the thread, and watched the vids. Love Snake Bite's words too not just the playing, tone, & production which were also really nice and something to be proud of. Just curious on the odr-1 is it an early or recent model (not that it matters much) and if you've seen/played the newer one with a gain switch mod also?
Hi, Thank you... yeah, Snake Bite was a fun tune to record...
The ODR-1 is an old one. I bought it at Mike Es Music in the Nashville Area in 1995. I have not done an A-B test against a new one but I am told the old ones are better by reliable ears I know. I have a few other OD pedals such as a XTS, Zen Drive, and Misc others not worth mentioning. The ODR however is my favorite and has been on a lot or sessions...
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Nothing "vintage" or different between circuits and most parts from '95 so I'm not sure there should be something extreme? But possibly different (4558) OpAmps would be a guess and that would make the most difference.
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I decided to throw in a old D-120F and oh man, I can't find a reason to go any further. Very sweet cleans and the pedals sound amazing. I found a keeper...
(http://p2pamps.com/pr/44.jpg)
(http://p2pamps.com/pr/43.jpg)
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Is that a 12" cab?
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Yeah 12" cab from Mather and deluxe OT too
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My cab is also on order from Mather. I'm going with a 12" baffle as well.
Hey Mike, do you remember which way you switched the blue and brown OT wires? I remember from the posts back that you fired it up the first time, then switched the OT wires, but the photo looks the same to me as the first photos. It looks like you have the blue OT wire going to V5 (on the left looking down with pots pointing toward you), and the brown wire going to V6 on the right.
Do you now have the blue going to V6-3, and the brown going to V5-3 ?
Thanks
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My cab is also on order from Mather. I'm going with a 12" baffle as well.
Hey Mike, do you remember which way you switched the blue and brown OT wires? I remember from the posts back that you fired it up the first time, then switched the OT wires, but the photo looks the same to me as the first photos. It looks like you have the blue OT wire going to V5 (on the left looking down with pots pointing toward you), and the brown wire going to V6 on the right.
Do you now have the blue going to V6-3, and the brown going to V5-3 ?
Thanks
Brown V5
Blue V6
Take a look at the pics here, this should answer all your wiring questions ok.... These are two different PR I build with Doug's layout and turrets
http://p2pamps.com/pr (http://p2pamps.com/pr)
http://p2pamps.com/kbpr (http://p2pamps.com/kbpr)
Also, Another small change I made was using a 220K in the tremolo circuit instead of the 1M resistor. It give you way more intensity. I also added a 50K Pot in the grouund switch hole to use as a middle control. You can experiment around with pot values there if you decide to add a mid. I started with a 10K then bumped it to a 50K. So far the 50K is pretty cool...
(http://p2pamps.com/trem.jpg)
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I've been meaning to ask, what's on all the solder contacts - nail polish? Why did you feel a need to mark them all?
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I've been meaning to ask, what's on all the solder contacts - nail polish? Why did you feel a need to mark them all?
(http://p2pamps.com/goop.jpg)
This is what I use. I have two reasons, first it is my way of doing a self QA process. It forces me to look at every single solder point and make sure I didnt miss anything. Second, if I sell it and it comes back after someone else worked on it I should see the red lacquer disturbed. Plus, it reminds me of my vintage Marshalls :) :icon_biggrin:
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That is a great idea! Even on the nuts.
Wow, Dykem - I've sniffed a lot of that over the years.... It also works well painted on the frames of your "buddy's" safety glasses that might just happen to come in contact with his face! High spot blue is good for long term interaction.... :icon_biggrin:
Jim :dontknow: :icon_biggrin:
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Thanks. I do see that you reversed it on the second build so I'll go with that.
I decided to try a 470K ohm in that tremolo circuit to see how it sounds. Will hopefully post video later.
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Thanks. I do see that you reversed it on the second build so I'll go with that.
I decided to try a 470K ohm in that tremolo circuit to see how it sounds. Will hopefully post video later.
470K will be fine. 220K will give you a ton of intensity but you can always turn the knob down :)
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I just bought a few of the astron 'clones' yellows and reds @ .02 to test in a Champ against SoZo yellows/blues, Mallorie's 150's and Orange drops 715 and 415(?) the OD caps Tubenit uses...
Willabe, when you test those caps I would really like to know what you think of the results. Which kind do you like best?