Capacitor C2 TW Liverpool

[leeuwa]

I'm new here, and I'm starting to build my first TW Liverpool for my son. I followed as lead to construct the amp the TW Liverpool schema from Ken Fisher, and the Liverpull layout schema from Ceriatone.
I followed the schema from KF through the Ceriatone layout, and noticed a different at capacitor C2. KF schema C2=50pF, Ceriatone layout C2=500pF. Question: what is the best to use for C2 50pF or 500pF? Or does it not matter?

[M Fowler]

The Liverpool shares the same circuity as the Express and the Express is showing a 500pf cap for C2 so I am sure it should be 500pf.

Mark

[tubedogsmith]

Liverpool used a 50pf treble cap. although a cool sound is the 500pf treble cap and a .002uf mid cap.

[leeuwa]

OK, thanks. I'm going to use a 500pF for C2.

[PCollen]

The Liverpool shares the same circuity as the Express and the Express is showing a 500pf cap for C2 so I am sure it should be 500pf.

Mark

Although I never owned/built one, I always figured that 50pf T-cap on the L-pool schematic was an error.

[JamesHealey]

The original value of Liverpools was 47pf never 500. This is Nick's own value on his kit

[Zippy]

The original value of Liverpools was 47pf never 500. This is Nick's own value on his kit

We'll have to see if he is watching this discussion and corrects that.

[M Fowler]

Well I have been reading for the past three years that the Express and Liverpool are identical except for the obvious power section now I am told they are not? That must have been meant to read the layout is the same components may vary. Readers beware.

No big deal as I used Ron's layout when I build my Liverpool so I probably did use the 47pf in that position.

Mark

[PCollen]

Well I have been reading for the past three years that the Express and Liverpool are identical except for the obvious power section now I am told they are not? That must have been meant to read the layout is the same components may vary. Readers beware.

No big deal as I used Ron's layout when I build my Liverpool so I probably did use the 47pf in that position.

Mark

50pF gives a very deep mid-range scoop to the tone stack profile similar to a stock BF Fender, while 500p results in a profile similar to the Express.

[funkmeblue]

the liverpool also uses a 250k for the bass and the express 1 meg

[paulster]

Yep, the tone stacks are different between Express and Liverpool.

[JamesHealey]

Also the rc filter of 2n2/68k is peaking at about 1k which is higher than an express, so the mid range that is lost in the 50pF tone stack cap is regained here I believe to some extent. Different amps in more than power tube choice and OT.