I've decided to build Steve Dove's 5 band EQ that was published in Studio Sound back in 1981 (Part Nine, Equalizers 3). But, I cant find a source for the potentiometers, dual, antilog, 10K, 22K, 47K and 220K. Schematic attached.
The usual suspects, like Digikey and Mouser, don't have. Any suggestions?
Thanks in advance,
Mike
The usual suspects, like Digikey and Mouser, don't have. Any suggestions?
Thanks in advance,
Mike
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I recall that BI/TT electronics had some, but they might only be available from Mouser in 50k resistance.
Other (non-stupid) options are Omeg (https://www.omeg.co.uk/).
You can try State Electronics to see if they have anything suitable in stock, and you might be able to buy a small quantity at reasonable price. Don't count on it though - last time I contacted them the cheapest option was to buy 250 pots at a cost of $9,000. Not very friendly for a dude in his basement.
Edit: A few more.
http://www.audiomaintenance.com/
https://capi-gear.com/catalog/
https://www.studioelectronics.biz/sunshop/
Good luck. This is probably the most difficult part to find if you're building an EQ.
Other (non-stupid) options are Omeg (https://www.omeg.co.uk/).
You can try State Electronics to see if they have anything suitable in stock, and you might be able to buy a small quantity at reasonable price. Don't count on it though - last time I contacted them the cheapest option was to buy 250 pots at a cost of $9,000. Not very friendly for a dude in his basement.
Edit: A few more.
http://www.audiomaintenance.com/
https://capi-gear.com/catalog/
https://www.studioelectronics.biz/sunshop/
Good luck. This is probably the most difficult part to find if you're building an EQ.
Many thanks for this @H713!
www.audiomaintenance.com had all hard to find potentiometers.
Will try to squeeze in 2 channels in one U 19" rack, or is that too tight?
I can share the PCB design here, If there's interest? Or are there similar projects already here that makes this uninteresting?
Regards,
Mike
Glad you found them, and for a reasonable price 🙂
If not, I would have suggested using easy to find straight Log ones, and reverse the scale on the front panel, easy thing on a DIY unit.
If not, I would have suggested using easy to find straight Log ones, and reverse the scale on the front panel, easy thing on a DIY unit.
Another solution is to put the frequency scale on the knob, not on the panel. The scale looks right since it goes clockwise; I think I saw that on a function generator.