I was going by the label on top that shows
50KA X 2
I this to indicate some stereo version of the RK50 but I may be completely mistaken. One can hope.
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.
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- 52 posts total
@mashif That’s a specification - 50,000 ohm input impedance, x2 for stereo (2 gang) - not a model number. If you were looking at an RK50 model you’d think "wow!" - it’s massive, shiny, beautiful and gold :) The RK50 doesn’t imply 50,000 ohms either (though that is a very common choice); it comes in a few different impedance values. |
@noromance Thanks for posting about this! I built a Waynes 2018 preamp, a DIY design from the good folks at Pass labs that I put an Alps 27K in and it is good. But you and the other contributors here have given great leads on what promises to be a significant upgrade. Thanks too to @mulveling. I don't think I can swing the RK50 but the Alps RK40 looks doable! Great stuff. |
OP has touched on a very overlooked part of preamps. An afterthought piece which is quite critical to everything. You guys are technically beyond me, but I can hang with the best when hearing the differences in quality. There are some volume pot geeks who've drilled deep into the subject. Thanks for the posting. |
- 52 posts total