5E3 with trem and 4x 6V6's ?

[randalp3000]

I picked up a Swart awhile back and currently really digging the Tweed deluxe sound but would like a little more balls.

Thinking of building this on an express chassis I have laying around with some big ass TW iron. Also thinking about an octal preamp. Hope to leave work early to start on the schematic and punch some holes.

[randalp3000]

Here's what I have so far. Working on the trem circuit.

Please share your comments

[randalp3000]

Here's the trem circuit.

Not sure what OP trans I want to use. I have on hand a MC AC30, A470, or a tweed baseman. I think all are 4K primary. I'm leaning toward the tweed baseman but not sure if it can handle the current.

[cbass]

What is that trem circuit from? Might have a hard time getting the oscillator to start with them .05 caps . your not gonna get much depth on q cathode biased circuit . a pre amp wiggler may be better. I don't think you can do it with one triode though

[Stevem]

Your reuse of the letters A, B and what not for the grounds and the power supply nodes is strange to me, but its your build?

I would up that 25uf output stage cathode bypass cap to at least 100 uf, but let your ears be the judge once you get it up and running and thru the speakers you will be using.

If its a original tweed Bassman OT then that should be inter leaved and would be my pick if that tweed nature is what your after, other wise the AC30 OT should work out fine!

[billyz]

Maybe look at the 5e9a tremolux circuit. The tremolo is very nice and modulates the pi.

[randalp3000]

Thanks for the reply's

trem circuit is a copy of and old gibson amp that I kinda like. I think I did it to an old 5e3 build long ago and it worked well enough.

the baseman OP trans is actually a Hammond replacement. Not sure if it will handle all the current of 4 cathode biased 6V6's. https://www.cedist.com/sites/default/fi ... t1750m.pdf

I will check out the tremoluxe again also. Trying to keep it simple.

This is going to be a VERY ugly build. The chassis is not too great and has tons of holes in it.

[Stevem]

That output transfomer is rated for 50 watts RMS so it be fine with the drive current load of 4 tubes!

[randalp3000]

wow, nobody called me out on the upside down V1B I'll fix it tonight.

going to go home early and redo it with a parallel octal preamp and a 5e9a trem circuit adding a 3rd triode.

thanks again

[randalp3000]

This is it thus far with no trem. Fired right up with no issues. 374v on the plates drawing around 37mA each 6v6 with a single 120R cathode cap.

Sounds like it should, gain comes on really fast and starts to break up around 2. I was worried about the low gain of the 6SL7 but it gets loud and breaks up pretty early. I would like a bit less gain.

Going to try a Princeton trem circuit soon.

[randalp3000]

Princeton trem not working very well, might switch it to the gibson circuit

[dorrisant]

Just wondering if you ever got this thing sorted out?
I am beginning to build a 4 x 6v6 5E3 and I have been doing some research...
Bruce from mission amps suggested separate cathode 225R resistors for the push pull pairs. Don't know if that would make a big difference or not.

[10thTx]

Here is an idea for your consideration. It was an idea I had some time back and I have not built one.

Perhaps using a mosfet in the vibrato would get you enough oooomph to make the vibrato work on the four 6V6 5E3?

With respect, 10thtx

[David Root]

I built a 5E3x2 a few years ago in a Weber '57 Twin chassis & cabinet. Sold it a few months ago, was arguably the best sounding amp I have built.

Was actually a Rowe DeArmond R15 x 2 without the trem.

Used a BF Bassman PT with a 40V 25W zener on the PT CT to ground to cut the voltage. Two 5Y3 in parallel and the 4 6V6 wired as pairs, each pair to is own cathode resistor/cap. Mercury Mag 4x6V6 4K OT.

[dorrisant]

Nice!