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Hoffman Amps Forum image Author Topic: remove tonestack from 2204 circuit  (Read 2085 times)

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Offline joesatch

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remove tonestack from 2204 circuit
« on: November 12, 2022, 09:20:35 pm »
i know there is a method where you remove the ground from the middle pot but i want to delete the entire tonestack. I'm running all the tone controls on 10 constantly so i would like to delete the tonestack. How would i get the signal from the cathode follower to the MV pot? 

Offline sluckey

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Re: remove tonestack from 2204 circuit
« Reply #1 on: November 12, 2022, 10:03:23 pm »
One coupling cap directly between cathode and MV pot.
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline d95err

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Re: remove tonestack from 2204 circuit
« Reply #2 on: November 13, 2022, 01:58:15 am »
All knobs on 10 will not be the same frequency response as deleting the tonestack though. You will get a different sound.

To run everything always on 10, you could replace the pots with fixed resistors of the same value as the pots.

Offline joesatch

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Re: remove tonestack from 2204 circuit
« Reply #3 on: November 13, 2022, 09:31:58 am »
All knobs on 10 will not be the same frequency response as deleting the tonestack though. You will get a different sound.

To run everything always on 10, you could replace the pots with fixed resistors of the same value as the pots.

if the controls went to 11 i would have them there so i will delete the tonestack completely. I'll yank the slope resistor and replace the 470pf off the cathode follower with a 22nf running directly to the MV

Offline Jennings

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Re: remove tonestack from 2204 circuit
« Reply #4 on: November 13, 2022, 12:12:27 pm »
I’d be interested to know what the result sounds like 👍

 


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