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Old 26th November 2004, 01:20 AM   #1
D_GR8_1 is offline D_GR8_1  Australia
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Default 100K, 250K or 500K POT?

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)?
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Old 26th November 2004, 01:23 AM   #2
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50k or less would be better suited, but if there is no other choices, go for 100k.
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Old 26th November 2004, 02:03 AM   #3
mcs is offline mcs  Denmark
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250K and 500k types are mostly used for replacing pots in old tube equipment. 50k or 100k is more suitable for your purpose.

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Old 26th November 2004, 02:24 AM   #4
D_GR8_1 is offline D_GR8_1  Australia
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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!
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Old 26th November 2004, 02:33 AM   #5
mcs is offline mcs  Denmark
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Yes, 250k and 500k are still only for old tube circuits

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

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Old 26th November 2004, 06:46 AM   #6
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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.
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