100K, 250K or 500K POT?

[D_GR8_1]

Hi,

I am looking to purchase some ALPS pots from e-bay and the guy is selling three types, 100K, 250K, 500K.

Which one will be most suitable for a Gainclone design (using either LM3886 or LM4780)?

 

[Peter Daniel]

50k or less would be better suited, but if there is no other choices, go for 100k.

 

[mcs]

250K and 500k types are mostly used for replacing pots in old tube equipment. 50k or 100k is more suitable for your purpose.

Best regards,

Mikkel C. Simonsen

 

[D_GR8_1]

I am planning to use an OPA627 based buffer in my setup, so does the POT value really matter when using a buffer?

The POT will be located before the buffer!

 

[mcs]

Yes, 250k and 500k are still only for old tube circuits 🙂

For new tube circuits you would use 50-100k also.

Best regards,

Mikkel C. Simonsen

 

[peranders]

As Peter said 50 k or even lower. I would have take 10 kohms if it had fit. Less resistance, less noise and sometimes less offset shifts.