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Hoffman Amps Forum image Author Topic: Volume and Tone Pot Ranges  (Read 1715 times)

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Offline Ghetto_Soundwave

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Volume and Tone Pot Ranges
« on: March 07, 2021, 10:23:21 pm »
I have new build going and wondering if I can use a few pots I have on hand.


7K Linear for mid controller in a TMB stack?
250K Audio for volume and master volume?
« Last Edit: March 08, 2021, 12:53:06 pm by Ghetto_Soundwave »

Offline d95err

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Re: Volume and Tone Pot Ranges
« Reply #1 on: March 08, 2021, 12:38:08 am »
Can’t tell without knowing what circuit you’re building.
« Last Edit: March 08, 2021, 01:10:24 am by d95err »

Offline Ghetto_Soundwave

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Re: Volume and Tone Pot Ranges
« Reply #2 on: March 08, 2021, 01:18:24 am »
Tubenit's SoLow Watt  twin triode preamp version. No send/return.
https://el34world.com/Forum/index.php?topic=13438.0
« Last Edit: March 08, 2021, 01:21:25 am by Ghetto_Soundwave »

Offline d95err

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Re: Volume and Tone Pot Ranges
« Reply #3 on: March 08, 2021, 05:13:19 am »
If I’m looking at the right scematic, the mid pot is 50k, so 7k is way too small.

You could use a 250k volume pot. The original is 500k, so if you want a similar frequency response, you’d need to double the coupling and bright cap values and halve the 470k resistor to ground (220k is close enough). Or you could just use the 250k pot and see what it sounds like.

The master volume is a dual (stereo) pot. If you only have a single pot, it won’t work of course.

Hope that helps!

Offline Ghetto_Soundwave

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Re: Volume and Tone Pot Ranges
« Reply #4 on: March 08, 2021, 01:12:06 pm »
Thanks 95. That does help.

 


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