Author Topic: AB763 Deluxe Lite build. (Read 24665 times)

Papa Jim · « **on:** April 05, 2019, 09:50:41 am »

Someone gave me PT, OT, and Choke out of a Fender DRRI amp so I think I am going to build one of these. I have a lot of the other parts on hand also. I want to make sure before starting that the schematic and layout on this link is the latest, or if there is any other info that would be beneficial before starting this build. I'm pretty sure it would be but just double checking for my own sanity. http://sluckeyamps.com/misc/AB763_Deluxe_Lite.pdf

Papa Jim · « **Reply #1 on:** April 05, 2019, 09:58:25 am »

Doe's a parts list exist. If not I'm assuming all the carbon comp's are 1/4 W and the Films are 1W ?

sluckey · « **Reply #2 on:** April 05, 2019, 10:23:16 am »

All resistors are 1/2 watt unless specified on the schematic. I recommend metal film for all 1/2 watters and 3 watt metal oxide for all others. It's a small parts count so make your own parts list. That's a good way to get familiar with the amp. I'm not aware of any problems with these drawings. There are several discussions about this amp. Search for "deluxe lite" on this forum.

I NEVER BUILT THIS AMP! Several others have.

ElusiveMoose22 · « **Reply #3 on:** April 05, 2019, 11:15:36 am »

Very cool, I bet this turns out great! You may already be aware but Rob Robinette has a very similar amp concept with schematics and lots of data on his website as well. He also has a wealth of information on classic AB763 circuits in general, definitely worth a read through if haven't done already. https://robrobinette.com/RR763_BLACKVIBE.htm

Good luck and let us know how it goes!

dude · « **Reply #4 on:** April 05, 2019, 11:23:54 am »

I built the amp, plays fantastic as drawn, sounds great, no problems.
One of my favorite amps.
Only change I made was to lower cathode caps to 4.7uf and 10uf, preamp, most Fenders IMO, are a little too bassy with 25uf's.

al

Papa Jim · « **Reply #5 on:** April 05, 2019, 12:36:58 pm »

Thanks to all. I will keep ya all posted.

jasonvilla · « **Reply #6 on:** April 05, 2019, 02:25:44 pm »

I've also built this amp. It's a cool build! I reduced power to the preamp a bit for more gain and installed a master volume. The master volume really isn't that helpful in this amp... but I put it in place of the voltage divider before the PI. Have fun!

Papa Jim · « **Reply #7 on:** April 05, 2019, 04:16:58 pm »

Why are there 2 different build options for the PS Filter cap board? One has a note that it is for a deluxe reverb so I assume the other simulates a plain deluxe model. This amp has no reverb though so which to use and is there a tone difference. Doe's it matter which one I select?

sluckey · « **Reply #8 on:** April 05, 2019, 04:29:45 pm »

The one on top is for the Deluxe AB763 6V6 based amp ***ONLY***. The one on bottom is for all the 6L6 based AB763 amps. They are different. Look at some AB763 schematics.

Papa Jim · « **Reply #9 on:** April 05, 2019, 04:38:47 pm »

Ok. Perfect I will be using 6V6's and I have a 40/20/20/20 can cap I wanted to use. Thanks.

sluckey · « **Reply #10 on:** April 05, 2019, 05:37:49 pm »

That can will make for a nice neat and compact power supply. All the resistors could mount directly to the can.

Papa Jim · « **Reply #11 on:** April 05, 2019, 05:40:15 pm »

Sure does! Excellent idea. Thanks.

Papa Jim · « **Reply #12 on:** April 06, 2019, 08:01:37 am »

Can't seem to find a color code anywhere.
I think the red's are B+ with red/yellow the C.T.
red/blue 38vac

green's are filament.

yellow's 5vac

possibly{ red (hot) white(neutral) }

Willabe · « **Reply #13 on:** April 06, 2019, 08:40:26 am »

Find a schematic for a Fender DRRI, see what colors they show.

Then test those colors/pairs for continuity/resistance, to each other and not to any other wires.

Papa Jim · « **Reply #14 on:** April 06, 2019, 08:45:05 am »

ah ha. Got it. I would have sworn the colors weren't on the schematic but they were. Geez what a beginner

Papa Jim · « **Reply #15 on:** April 06, 2019, 08:50:42 am »

Everything is cool.

Papa Jim · « **Reply #16 on:** April 06, 2019, 11:19:34 am »

Do you think my tone would suffer any if I used SS Rectifier with Sag resistor possibly or not? I've never had a tube rectifier to compare tone.

sluckey · « **Reply #17 on:** April 06, 2019, 11:29:00 am »

Just build it with a socket wired for a 5Y3, or 5AR4. Then also buy a plug-in SS rectifier (with or without sag resistor) from Weber. Now you can have both and you will be the expert that can answer that question next week when it pops up again.

Papa Jim · « **Reply #18 on:** April 06, 2019, 11:33:02 am »

Never knew of such a SS rectifier that fits a tube socket. I will have to add a 5y3 to that list also in order to compare.

Papa Jim · « **Reply #19 on:** April 07, 2019, 01:27:27 pm »

Due to pre-existing holes in this chassis I am re-purposing before I drill screw holes I would like to do it like this but. Is this orientation ok, or is there any other locations that would be better. I can rotate any of them if need be.

davidwpack · « **Reply #20 on:** April 07, 2019, 01:33:23 pm »

That's about how I placed them for my last build. I had no problems. Maybe slightly further apart.

sluckey · « **Reply #21 on:** April 07, 2019, 01:41:59 pm »

You may want to make a cardboard template to represent your circuit board. Might help figure out positions so nothing interferes with anything else.

Papa Jim · « **Reply #22 on:** April 07, 2019, 02:05:14 pm »

Clearance's will be fine Sluckey, but actually my choke orientation would be ideal if this is ok. I know they say 90 degrees though but I am not sure exactly how they determine that or if that applies to the choke too. Is this pic ok with the choke like this? Any way I rotate it in the same plane seems like would be ok in relation to, since the laminates are vertical and not horizontal like the PT.

sluckey · « **Reply #23 on:** April 07, 2019, 03:05:44 pm »

Probably fine. Let's see the whole chassis.

Papa Jim · « **Reply #24 on:** April 07, 2019, 05:25:02 pm »

Here some pics. The intent is for a re-purpose of chassis and most parts build because I am cheap.

All the extra chassis holes will be plugged with steel pop in plugs, and faceplate made to cover the extra pot holes. Only gotta get a one more 6v6 and it's socket so the bang for my buck will be extremely high for this amp build. Gonna save a lot of space doing the filter cap with the resistors soldered right on it's terminals like you suggested Sluckey. Also just going with 2 diodes in the ps instead of tube for now.

sluckey · « **Reply #25 on:** April 07, 2019, 06:20:34 pm »

Quote

Also just going with 2 diodes in the ps instead of tube for now.

I highly recommend using four diodes, two on each side.

Papa Jim · « **Reply #26 on:** April 07, 2019, 06:29:03 pm »

Your talkin 4 total but not a 4 diode bridge because I have a center tap aren't you?
If so series for some reason or parallel for if one blows? Or something else.

shooter · « **Reply #27 on:** April 07, 2019, 06:32:41 pm »

like this;

Papa Jim · « **Reply #28 on:** April 07, 2019, 06:53:08 pm »

ok gotcha shooter and just read valve wizard why. Thanks guys

Papa Jim · « **Reply #29 on:** April 11, 2019, 07:48:56 pm »

Hey Sluckey gonna get a start on this baby tomorrow with the parts I had on hand. Ordered the remainder of parts today.

sluckey · « **Reply #30 on:** April 29, 2019, 07:16:39 pm »

Any progress? Forward or backward?

Papa Jim · « **Reply #31 on:** April 29, 2019, 07:26:03 pm »

A little bit. Got the trannies and sockets mounted. Some things came up to delay me, but just this week back to normal and wife will be gone all next week. Lot's of time to get a handle on it. I feel like tomorrow I will get back to it on a steady basis Sluckey. Got my parts all gathered up also. Gotta take some progress pics also.

Papa Jim · « **Reply #32 on:** April 30, 2019, 12:29:58 pm »

Progress today. Ready to load up the turret board.

Papa Jim · « **Reply #33 on:** May 03, 2019, 05:55:18 pm »

Off and running on the turret bd. that I re-purposed by removing all the turrets and filling the old holes with epoxy and sanding smooth. Also has turrets removed from a different build. Ignore the 5 watt - 1500R cathode resistor. I couldn't come up with one smaller in my spares. It's all good though. Not going for beauty but functionality and tone only.

Papa Jim · « **Reply #34 on:** May 04, 2019, 01:29:24 pm »

I found one. Doe's this look better sized for R5 guy's.

Papa Jim · « **Reply #35 on:** May 05, 2019, 09:06:55 am »

Got some more done.

sluckey · « **Reply #36 on:** May 05, 2019, 09:57:52 am »

There's gonna be lots of sensitive signal wires crossing over/around that cap can. The first cap in that can will have lots of strong 120Hz ripple (maybe even up to 10V). Could be a noisy/hummy problem. I would have put that cap can down in the power supply area, maybe even mounting it on the side wall over the PT.

Papa Jim · « **Reply #37 on:** May 05, 2019, 10:30:50 am »

I can do that. The layout from the ax84 4-4-0 that this chassis once was used for had it there for some strange reason.

Papa Jim · « **Reply #38 on:** May 05, 2019, 12:12:41 pm »

Slucky either 1,2,3 or 4 I can make work it. Even the outside of chassis if I choose to keep the whole length out I have enough room in the cabinet it is going in. Are these good places to start with.

sluckey · « **Reply #39 on:** May 05, 2019, 12:36:19 pm »

Quote from: Papa Jim on May 05, 2019, 12:12:41 pm

Slucky either 1,2,3 or 4 I can make work it. Even the outside of chassis if I choose to keep the whole length out I have enough room in the cabinet it is going in. Are these good places to start with.

I prefer 7.

It's OK to mount these cans inside the chassis if desired. Don't have to carve a big hole.

I looked at that 4-4-0 amp. It's a very small amp. They usually don't make as much B+ noise as a real amp. Even so, I don't think the ax84 crew put much thought into the location of that can.

Papa Jim · « **Reply #40 on:** May 05, 2019, 01:12:36 pm »

Ok cool. Gonna do it inside on the back wall beside the ac inlet probably.

dude · « **Reply #41 on:** May 05, 2019, 01:49:18 pm »

You'll be happy with Sluckey's Deluxe lite, I'd put in a M/V, I think his layout or schematic shows one. Helps to get a little more distortion at a lower volume, I used a pre-PI master, that's what Sluckey's schematic shows, if I remember correctly.

al

Papa Jim · « **Reply #42 on:** May 05, 2019, 01:54:20 pm »

Quote from: dude on May 05, 2019, 01:49:18 pm

You'll be happy with Sluckey's Deluxe lite, I'd put in a M/V, I think his layout or schematic shows one. Helps to get a little more distortion at a lower volume, I used a pre-PI master, that's what Sluckey's schematic shows, if I remember correctly.
al

not one on the layout or schematic. Gonna build it as is first to hear it then if I want I have a london power mv I can always add later. Gotta hear it stock before I mod it so I know if any mods mess it up. I doubt if I need one because I mostly play fairly clean. That's why I chose this one.

stratavox · « **Reply #43 on:** May 06, 2019, 08:32:49 pm »

I built mine with a SR power supply and cap setup, used a single 100 watt Celestion 12", and never looked back. This amp LOVES pedals, I added a variable negative feedbck which adds a nice low end bump at lower volumes...really nice in a small stage footprint.....

Papa Jim · « **Reply #44 on:** May 06, 2019, 08:38:30 pm »

I plan on using a I believe is a 35w 12" Celestion Greenback because it is already in the cabinet this amp is going in. Hoping that it works out.

Papa Jim · « **Reply #45 on:** May 07, 2019, 01:00:04 pm »

Added some labels, cap can, virtual ground, and filament wiring to the schematic for my own use. Can you all take a look at it for mistakes before I start wiring it.

sluckey · « **Reply #46 on:** May 07, 2019, 02:40:42 pm »

Quote from: Papa Jim on May 07, 2019, 01:00:04 pm

Added some labels, cap can, virtual ground, and filament wiring to the schematic for my own use. Can you all take a look at it for mistakes before I start wiring it.

Sure. Bring it over this afternoon anytime after 5. Pick up a 12 pack of Ice House. Stop in Atlanta and pick up Ed too. He's a hoot!

Or you could just post some pics!

Papa Jim · « **Reply #47 on:** May 07, 2019, 03:28:55 pm »

Whoops. My head is in my......well you know where.

sluckey · « **Reply #48 on:** May 07, 2019, 07:58:13 pm »

Did you purposely omit one of the bias caps?

Papa Jim · « **Reply #49 on:** May 07, 2019, 08:13:43 pm »

Yep. You gotta problem with that.

The can only has 4 caps in it. jj 40/20/20/20
Or are you talking about my crazy nomenclature of C12/C13 for a single cap.

I really think there's 5 20uF. caps inside that thang.

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Author Topic: AB763 Deluxe Lite build. (Read 24665 times)