wrote in message
ups.com...
Hi

Does anyone know where I can source a good quality rotary switch (2
pole and 20 ways) to make a stepped attenuator??

I've looked at previous posts reccommending Blore Edwards but I can't
seem to find them on the web....maybe they're not trading anymore??
Farnell and RS gave me no joy.

I've got a home made amp and I'm currently using a conductive plastic
pot but I'd like to hear the difference in going to a stepped
attenuator.

**You'll certainly hear a difference, alright. 20 steps is utterly
inadequate to resolve the differences in level required for a decent system.
Try 100+ steps and you'll be getting somewhere. To do that, I'd suggest a
relay/resistor matrix is the way to go. The most recent example I've worked
on was in a Conrad Johnson preamp. It was pretty impressive. At least as
good as an Alps 'Blue Velvet' pot. Without the latter's (slightly) superior
ability for fine volume adjustments.

20 steps, you have to be joking!


--
Trevor Wilson
www.rageaudio.com.au



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