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I replaced the volume pot on my tube preamplifier.

Replaced the two mono Alps pots in phono preamp with Tocos (Tokyo Cosmos), RV24 units. I heard good things about these pots on other forums. Fair bit of work getting them to fit into the Croft 25R. I had to loosen the tube boards and drill out the mounting holes for the larger threads. The pots were only $26 for both inc tax and shipping. Huge improvement in speed, clarity, solidity, and transparency. I'm blown away. 

noromance
noromance's avatar
noromance OP
10,474 posts
 

@erik_squires  No. There’s not enough room to fit a discrete unit. The TACOS are carbon wipers whereas the Alps were plastic film. And, truth be told, I’m somewhat frugle in wringing out the best bang for the buck. 

erik_squires
17,543 posts
 

Ah, interesting.  I wasn't sure I thought someone made a discrete mini pot with surface mounted resistors.  Glad your experiment worked out!

noromance's avatar
noromance OP
10,474 posts
 

@erik_squires  Like these?
DACT audio attenuators
DACT Shop
CT2 Stepped Audio Attenuators - DACT

Interesting that these probably would fit but I’m not sure how well SMD resistors sound, and I wasn’t gonna take a $300 tryout! If I was building my own phono amp (some day!), I’d use a switched unit with bulk foils.

erik_squires
17,543 posts
 

No reason to keep experimenting. :)  I was just curious what you liked so much better than the famed Alps. :)

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