How to tune a Liverpool?

Express, Liverpool, Rocket, Dirty Little Monster, etc.

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jodie
Posts: 25
Joined: Thu Apr 05, 2007 7:48 am

How to tune a Liverpool?

Post by jodie »

If I want to play around with the values of the R C combination ( usually 0,002µF and 150k ) in front of V2 (which is last 1/2 ECC83 before the phase inverter) what is the best procedure?
Do R and C influence each other or do I just change C for sound and R for gain?
Thanks
Jodie
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gearhead
Posts: 928
Joined: Sun Mar 19, 2006 2:54 am
Location: Virginia (Fairfax)

Re: How to tune a Liverpool?

Post by gearhead »

That R and C are interactive. The R has a dual role; it is part of a voltage divider that determines how much oomph goes into that V2.

The R and C together are a high pass filter. Do a search on web and you'll find a high pass filter calculator. Plug in the current values and see where the cutoff freq is. If you want to increase/decrease the R for gain, you can find out what C you need to get the same high pass effect.
jodie
Posts: 25
Joined: Thu Apr 05, 2007 7:48 am

Re: How to tune a Liverpool?

Post by jodie »

Great, thanks!
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