Beginning my Liverpool build!

[Ledvedder5150]

The input is supposed to be sensitive up to the edge of unstable on these amps, according to what I could read here. Therefore, the hum may well be a minor problem when the build will be finished, or you'll be forced to tame the input and risk loosing that "trick".

How about you keep mounting the amp but being prepared to move the OT latter on, so not much trouble so far?

Great project, by the way!

That's what I'm planning. I'm leaving the OT wires long enough to be able to move it, if necessary. Thanks!

[Reeltarded]

Work looks great! I worry that the waterfall of hiss in your amp is going to include the screaming sound represented by the cosmic microwave background though.

LOTS of gain over there. Reeeeee. (like twitter in an amp)

[ChopSauce]

Experience is something one can't acquire but by himself...

Note that I never tried it myself but I'm confident enough that no grid stopper on the first triode is a fair challenge

[MeanMrMustard]

Thinking about buying one of those Modulus shazeez for my ‘Pool. Currently have the amp built in one of the Watts Tube Audio boxes. I’m guessing the iron you’ve got has a field unlike that of the typical style Pacifics and it has made the typical layout unusable. Always lots of white noise in these amps gained out but I have very very low hum with the traditional layout. Thanks to Miles’ raving about the Chante amp and the Thorn demo I got back into mine and have identical results. The only Wreck I really love. Got a used Celestion Redback and have been enjoying it with that for a couple days.

[guitarmike2107]

Looking good Ledvedder5150, Don't move the OT, it is totally fine there and does not affect the pre-amp valves and it does not pick up hum from the PT. It also leaves space for a choke to be fitted if you want to try that later on too.

Take your time and keep things tidy, especially around the pre amp valve sockets as that is the most important for keeping it stable.

[Ledvedder5150]

I've been reading some things about using a 68k instead of 150k. I'm doing this. But there's also references to a 2n2 cap and possibly removing it? Can anyone shed information on this one?

[MeanMrMustard]

I've been reading some things about using a 68k instead of 150k. I'm doing this. But there's also references to a 2n2 cap and possibly removing it? Can anyone shed information on this one?

I’d go with 68k/.0022uf. Mine’s a little different with tube rectifier, choke and 6SL7 for V2 but those values got me what I want out of it. Reference the Pete Thorn demo.

[Ledvedder5150]

I've been reading some things about using a 68k instead of 150k. I'm doing this. But there's also references to a 2n2 cap and possibly removing it? Can anyone shed information on this one?

I’d go with 68k/.0022uf. Mine’s a little different with tube rectifier, choke and 6SL7 for V2 but those values got me what I want out of it. Reference the Pete Thorn demo.

Yeah, the Pete Thorn video is the tone I'd like to get. I don't think he mentions much detail about the circuit.

Also, tell me about the 6SL7. How does it differ from a 12ax7?

[ViperDoc]

Also, tell me about the 6SL7. How does it differ from a 12ax7?

https://frank.pocnet.net/sheets/049/6/6SL7GT.pdf
https://www.jj-electronic.com/images/st ... 7/6sl7.pdf

[martin manning]

6SL7 has a bit less gain, more current. If the bases were the same, you could swap one for the other in the same circuit and the main difference would be a couple of dB less gain for the 6SL7.

[Reeltarded]

Chante is no 2n2 and 68k.

[Ledvedder5150]

Chante is no 2n2 and 68k.

You're talking about R7 and C8? So Chante goes straight from v1b to v2a without the 2n2? Just a 68k to ground?

[Colossal]

Chante is no 2n2 and 68k.

You're talking about R7 and C8? So Chante goes straight from v1b to v2a without the 2n2? Just a 68k to ground?

He means the paralleled, added 2n2. Chante is just 2n2 and 68k, not 2n2 || 2n2 and 68k. The added ceramic 2n2 was a later mod that KF did to Liverpools.

Glen Kuykendall posted this letter many years ago:

Liverpool Letter.jpg

[MeanMrMustard]

The Dan Boul clip with Express Ingrid sounds badass with the added .0022 but I didn’t like it when I added it to some builds years ago. As a LP guy pretty much exclusively I tend to prefer things a bit leaner much of the time and in that spot it doesn’t take much more to start to be the detriment to articulation.

[Ledvedder5150]

Thanks for clarifying that! What about the 820r into v2? Anyone tried that?