Awhile back member Adason had a near-giveaway of dual stepped attenuators like the ones shown in the picture below (these two are from Adason). Unfortunately, these two particular attenuators don't have matched values, they differ at steps 1, 3, 6, 9 and 12. also, they step backwards meaning the highest resistance occurs at the far-clockwise position, which is fine by me. Anyway!
I would like to use two matched attenuators in a Balanced Iron Pre project. If anyone who picked up an attenuator identical to either one of these from Adason has one for sale, or wants to swap with me to create a matched pair, please let me know. Thank you!
red resistor values at those steps: 2R3, 2k, 20k, 200k, 2M
brown (Dale) resistor values at those steps: 0R5, 2k5, 25k, 250k, 2M5
remaining values written on the paper
I would like to use two matched attenuators in a Balanced Iron Pre project. If anyone who picked up an attenuator identical to either one of these from Adason has one for sale, or wants to swap with me to create a matched pair, please let me know. Thank you!
red resistor values at those steps: 2R3, 2k, 20k, 200k, 2M
brown (Dale) resistor values at those steps: 0R5, 2k5, 25k, 250k, 2M5
remaining values written on the paper
Attachments
I have been really pleased with the quality of switches from Blore Edwards take a look at the PZ switch. There website is mainly PDFs but the switches are great. You will need to customise the spacer between wafers so you can for the resistors. Or talk with them they seem to have SMD PCBs that appear to already do what you want…
I don't have anything on the shelf, but I'll throw this out there...
I got bare rotary switches similar to the one you got from Adason on eBay. Those were used to make a custom build for a Marchand Crossover that uses custom resistor values (not audio taper, not linear taper). My conclusion on that project - I'll buy turnkey attenuators from now on. I went against that concept when I made a preamp with Slagle autoformer...
If you want a turnkey solution - have a look at EIZZ stepped attenuators. I've used their stepped attenuator in an IronPre build.
Not expensive enough? Goldpoint makes nice attenuators.
There is a 128 steps balanced in/out stereo volume control kit on eBay for consideration, too.
I got bare rotary switches similar to the one you got from Adason on eBay. Those were used to make a custom build for a Marchand Crossover that uses custom resistor values (not audio taper, not linear taper). My conclusion on that project - I'll buy turnkey attenuators from now on. I went against that concept when I made a preamp with Slagle autoformer...
If you want a turnkey solution - have a look at EIZZ stepped attenuators. I've used their stepped attenuator in an IronPre build.
Not expensive enough? Goldpoint makes nice attenuators.
There is a 128 steps balanced in/out stereo volume control kit on eBay for consideration, too.
I appreciate the suggestions gentlemen. Part of my aesthetic for this build is to try to find and properly repurpose discards/salvage that someone of sharp eye and practiced in the art recognized to yet be of use and value. I am inspired by ZM and his repeater transformers, pulled from old telephone exchanges, that made old CD players sing. Though I practice this art of scavenge from a much more intellectually basic starting point, to me the 'junk' pulled out of god knows what kind of control console that used resistors matched to 0.001% is far sexier than something I can buy off the shelf. I may yet give up and throw $$$ on stepped attenuators, but not yet, not yet.