Author Topic: Spin Off of 2015 list (5E9-A) Im gonna build the 5G9 instead (Read 46796 times)

lego4040 · « **Reply #150 on:** January 28, 2015, 09:43:41 pm »

So many different ways to build just one amp. I will order chassis tomorrow, Mercury PT I ordered earlier today. I need to remember again who made the narrow tweed pro cab that also gave the 12" baffle option. That's for tomorrow's deed, maybe a speaker too. I can walk up to Rudys guitar shop too, they a are a tone tubby dealer. Maybe I can demo some speakers

lego4040 · « **Reply #151 on:** January 29, 2015, 08:27:07 pm »

I updated that BOM I've started and my PT from Mercury should be in by Wednesday. I gotta order my Chassis tonight, Damn a.d.d. Sidetracks me

tubeswell · « **Reply #152 on:** January 29, 2015, 08:47:24 pm »

Quote from: lego4040 on January 29, 2015, 08:27:07 pm

... Damn a.d.d. Sidetracks me

Occupational hazard

lego4040 · « **Reply #153 on:** January 30, 2015, 11:09:56 am »

Im ready to order the cabinet and my question is this; The narrow tweed pro comes with a 1x15, should I stay with that size or ask cabinet maker to make the sutout 1x12???? opinions

Willabe · « **Reply #154 on:** January 30, 2015, 11:32:11 am »

It came with a 12". Good 15" for guitar are harder and more $$ then 12" speakers. Plus some/a lot of the 15" are rated for much higher wattage.

If you like/want some speaker breakup you need a lower wattage speaker.

Brad

lego4040 · « **Reply #155 on:** February 02, 2015, 07:21:18 am »

So the WGS Speaker I have is a 12" 8ohm 2007 vintage series. From the reviews I've read these were at the beginning of WGS and they got really good reviews. I'm gonna reach out on their forum and see if I can get specs for it. I might have saved myself some dough. It's a beast and I believe it was 50-75 watts. Might be a bit much

lego4040 · « **Reply #156 on:** February 02, 2015, 04:48:08 pm »

Chassis is on its way, I choose the Mojotone 5E5A and will get correct faceplate when the time comes

lego4040 · « **Reply #157 on:** February 04, 2015, 08:26:30 am »

Mojo still hasn't sent chassis, grrrrrr. So I have a question on grounding for this amp, my intenstions are to follow the rule of thumb here and just go with the Doug's grounding paths

Willabe · « **Reply #158 on:** February 04, 2015, 10:11:36 am »

Doug's grounding works very well. A lot of guys have used it in a lot of builds and were/are very pleased with it.

Brad

lego4040 · « **Reply #159 on:** February 04, 2015, 11:26:32 am »

lego4040 · « **Reply #160 on:** February 04, 2015, 06:20:27 pm »

HOT IRON

Willabe · « **Reply #161 on:** February 05, 2015, 01:58:00 am »

Ooooooohhhhh!!!!! Nice!!!!!!!!

Brad

clyde · « **Reply #162 on:** February 05, 2015, 08:38:29 am »

Nice iron. Would you happen to have the specs for the PT Lego? Thanks.

lego4040 · « **Reply #163 on:** February 05, 2015, 09:07:40 am »

This is what Patrick emailed me for specs. Here ya go Willibe, from Patrick at Mercury
Hi Lionel,

Happy to hear that!

The 6.3 is rated at 5 amps
The 5V at 3 amps

clyde · « **Reply #164 on:** February 05, 2015, 06:36:00 pm »

You're going with the 5U4G as well? I'm thinking when I do mine I'll use a 5V4, possibly going with 300-0-300.

Willabe · « **Reply #165 on:** February 05, 2015, 06:48:27 pm »

Why would they give the 6.3v heater wind 5A's when a tweed Tremolux only needs 0.9A's for 3x12 _ _ 7 + 0.9A's for the 2x6V6's = 1.8A's?

5A - 1.8A = 3.2A extra heater current. That's almost double (3.6A) extra then what's needed.

And a Fender clone PT with that much more heater current, I think would have to have more B+ wind current also to handle the extra power load of bigger/more power tubes.

For a tweed Bassman, 2x6L6 set with 3x12 _ _ 7's only needs; 6L6=0.9A each, so, 2x0.9A = 1.8A, and 1.8A + 0.9A for 3x12 _ _ 7 = 2.7A

For a tweed Twin, 4x6L6 set with 3x12 _ _ 7's only needs; needs; 6L6x4, 4x0.9A = 3.6A, and 3.6A + 0.9 for 3x12 _ _ 7 = 4.5A.

That's either not what the spec really is, ie, he quoted it wrong, or it's for a different amp model.

I've bought iron from them before and probable will again, if needed, but at their web site they have no specs for current, like it's a big secret what any vintage amp model would need and that nobody can crack the code.

Brad

lego4040 · « **Reply #166 on:** February 05, 2015, 06:59:47 pm »

it's like the KFC recipe or some special sauce

lego4040 · « **Reply #167 on:** February 05, 2015, 07:02:42 pm »

USPS notifications say my chassis will be here Saturday

lego4040 · « **Reply #168 on:** February 07, 2015, 04:38:01 pm »

Chassis came today. Will see if Mercury drops right in later. To many beers last night

lego4040 · « **Reply #169 on:** February 09, 2015, 04:22:36 pm »

PT dropped right in(only it wasn't through holes) quick mod and I have a nice bracket holding it real tight. My concern is the way the windings are, if Install OT the way shown the windings are the same direction. When I put choke next to them it looks way to small but this is what specs show

VMS · « **Reply #170 on:** February 09, 2015, 05:02:25 pm »

Hi,

here is a link to a original 5g9. Looks like the choke is between PT and OT and also the OT winding is turned sideways:

http://vintageamps.com/plexiboard/viewtopic.php?f=8&t=105685#p1023278

Willabe · « **Reply #171 on:** February 09, 2015, 05:56:11 pm »

Quote from: lego4040 on February 09, 2015, 04:22:36 pm

My concern is the way the windings are, if Install OT the way shown the windings are the same direction.

That's a lay down PT, it's lams are on a different plane than the OT and choke. It won't be a problem.

And your OT coil and choke coil are on different planes, plus the choke is shielded.

Brad

lego4040 · « **Reply #172 on:** February 09, 2015, 06:42:16 pm »

Whew. thanks for the link, I've seen William Yates video quite a few times. Thanks Will

lego4040 · « **Reply #173 on:** February 10, 2015, 07:30:29 pm »

Willabe · « **Reply #174 on:** February 10, 2015, 08:37:59 pm »

Looking great!

Brad

lego4040 · « **Reply #175 on:** February 11, 2015, 04:02:55 pm »

I started putting in pots and jacks and noticed my first error. I need to use smaller standoffs and maybe I'll shift it back and over slightly

lego4040 · « **Reply #176 on:** February 16, 2015, 04:13:44 pm »

I got the iron going today

lego4040 · « **Reply #177 on:** February 18, 2015, 01:28:22 pm »

Hey Willibe check this out http://www.rareelectricguitar.com/Rory-Gallagher-Stratocaster-sale_794.html

lego4040 · « **Reply #178 on:** February 19, 2015, 07:57:26 pm »

I got the heaters, 1st 12Ax7, mains wired up, also or speaker out. I'm gonna use a 8&16ohm out. I kept main caps inside and still had room to spare.

Willabe · « **Reply #179 on:** February 19, 2015, 08:20:11 pm »

Quote from: lego4040 on February 18, 2015, 01:28:22 pm

Hey Willibe check this out http://www.rareelectricguitar.com/Rory-Gallagher-Stratocaster-sale_794.html

Thanks!

lego4040 · « **Reply #180 on:** February 19, 2015, 09:06:41 pm »

Will you still interested in the varistor?

Willabe · « **Reply #181 on:** February 19, 2015, 09:26:32 pm »

Yes, I'll PM you.

Brad

lego4040 · « **Reply #182 on:** February 19, 2015, 10:08:51 pm »

K, I've been in lala land and busy w work. The

Willabe · « **Reply #183 on:** February 19, 2015, 10:13:45 pm »

Me too.

Brad

lego4040 · « **Reply #184 on:** February 20, 2015, 10:59:11 am »

If I wanted to keep the tremolo on and not use the foot switch I just put that wire from the 1M to ground instead of tip. I think that's how I did it on Sluckey's A/C 15. What I might do is use the hole that is slated for old ground switch for the foot switch and use the two holes on back for dual speaker outs. One for 8 ohm the other 16 ohm

sluckey · « **Reply #185 on:** February 20, 2015, 11:26:07 am »

Quote

If I wanted to keep the tremolo on and not use the foot switch I just put that wire from the 1M to ground instead of tip. I think that's how I did it on Sluckey's A/C 15.

No. Don't confuse the AC15 and the 5E9A. They are different. The AC15 has to have a ground from the FS to ENABLE the trem. The 5E9A has to have a ground from the FS to KILL the tremolo.

The trem will work on this amp even if the FS is unplugged.

Ed_Chambley · « **Reply #186 on:** February 20, 2015, 01:09:00 pm »

Lego, just wanted to say very nice work. I hope you really enjoy that amp because with your build style it is going to be around for a while. Great blues amp, but ain't everything blues?

lego4040 · « **Reply #187 on:** February 20, 2015, 01:11:23 pm »

gotcha, also on the schematic/layout has pin 2/1/8 together. I know pin 2 is for heater, pin 1 isnt anything on the tube and pin 8 is cathode. Where should I tie the two pin 8's?? I was thinking those would just ground to chassis

sluckey · « **Reply #188 on:** February 20, 2015, 02:13:01 pm »

Quote

Where should I tie the two pin 8's?? I was thinking those would just ground to chassis

Connect them both to chassis using the same bolt that the PT center taps connect to.

lego4040 · « **Reply #189 on:** February 20, 2015, 02:15:06 pm »

That's what I was thinkng, just needed to check. I have a printout of the grounding guide from here

lego4040 · « **Reply #190 on:** February 22, 2015, 12:45:31 pm »

My tubes have arrived

Willabe · « **Reply #191 on:** February 22, 2015, 01:04:07 pm »

Nice.

Brad

lego4040 · « **Reply #192 on:** February 25, 2015, 11:52:36 am »

Question, I'm using the two Jack holes on bottom of chassis for 8 and 16 ohm seperate jacks. One hole is supposed to be where the tremolo footswich goes. I want to put that in the hole on front that would be for ground switch(since nobody uses a ground switch anymore) will I have noise issues running it over there? This amp is close to firing up after a number of x's going over it

sluckey · « **Reply #193 on:** February 25, 2015, 11:59:01 am »

Quote

will I have noise issues running it over there?

I doubt it. But it's just one wire. Just put it there and see.

lego4040 · « **Reply #194 on:** February 25, 2015, 06:22:16 pm »

That ground hole is way to big for the Jack. I might not even wire it now

sluckey · « **Reply #195 on:** February 25, 2015, 06:31:34 pm »

Shoulder washers...

http://hoffmanamps.com/MyStore/perlshop.cgi?action=template&thispage=MiscHardware&ORDER_ID=143278228

lego4040 · « **Reply #196 on:** February 25, 2015, 06:52:40 pm »

Ah yes, I see them. If I do use that then I need to wire ground since those washers insulate Jack from chassis. I will think about this. If I get a faceplate made I might just cover that up and put Jack in back still. Thanks for that tip

lego4040 · « **Reply #197 on:** February 26, 2015, 04:35:46 pm »

I fired up the amp after I did the poor mans variac test. I did not use power resistor, I used speaker and the bright channel was clean and clear but had a tic. When I shut off tremolo it went away. Normal channel was lower in volume too. Now here are my #'s, there is something way wrong here. I have fluctuations in V's, you'll see them w arrow in between. I have 10.31v on the rectifir heaters(wtf) and my B+ is less then my vac? Now the amp played clean and tremolo works but has noise.

lego4040 · « **Reply #198 on:** February 26, 2015, 04:42:34 pm »

If you look at my reply 179 and look at picture I have the two mains in parallel grounded to PT CT bolt. I grounded the other two mains by the buss bar on pots by 100ohm heater wires which is next to speed/depth pot, ground error? I have that pot buss bar grounded to the chassis way to the right by the inputs

Willabe · « **Reply #199 on:** February 26, 2015, 06:51:11 pm »

Pin 5 should have a negative ( - ) DCV on it for -bias.

Get that fixed 1st!

Take the power and pre tubes OUT and test for -bias DCV on both pin 5's of 6V6's. If you have a bias tap, then take the rectifier tube out too. If adjustable -bias, test with tubes OUT for min and max -DCV.

You might be drawing WAY to much current through the 6V6's and that's dropping the rectifier B+. Don't turn the amp on again until you take the 6V6's out and verify a -bias dcv on both pin's 5 of 6V6's.

Your also dropping screen dcv on 1 6v6 and not the other, might be the -bias.

V3 is the LFO tube, it's doing what it's supposed to do, oscillate.

What rectifier tube are you using? You posted 5A4GB?

Measure the rectifier tube pins 2 and 8, 1 pin at a time, + to a pin, - to ground. What do you get?

Brad

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Author Topic: Spin Off of 2015 list (5E9-A) Im gonna build the 5G9 instead (Read 46796 times)