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Dunno. Did you strap the LED in parallel with R6? Can't see what you did. Good, clear pic or two would help.

The Comp mod replaces nothing. It's the simple addition of a pot in series between R14/R169 and the Test Point. Just above R14/R169, you'll see the B250K COM pot in the 1st schematic.

I start by playing with my Johnson. Then, thru a MonoPrice "Stage Right" 15W 12" tube amp; an old Peavy 12" Solid Stat amp, and finally thru a Vox MV-50.

Use a single op-amp difference amplifier: Vout =R1/R2 (Vin +10) Set: R2 / R1 = 0.25

I learned in the 90's that any PCB with non-water-soluble materials in any of the components, saving DIP switches and other small electromechanical parts, can safely be cleaned with 99% isopropyl alcohol & a toothbrush then washed by hand with with soap & water, then rinsed with distilled water...

Try changing the value of R3 to 4K7 (instead of 47K). If that doesn't bring it down, change the Gain pot to a 50K with R3 still at 4K7.

When comparing the datasheets between those two converters, they appear to be a direct replacement for the older IEB0105S12 version.

Unfortunately, not at this time. The Binaura takes a 4PDT stompswitch and all of the currently available relay bypass boards are for 2PDT switches.

I sit on m'bum. Not posting a pic.

Electronically and sonically they are identical. The only difference is the physical size.

Almost 3 weeks later and I'm still getting about 30 spam emails a day on that fresh Gmail account.

If the fuse is good, I'd start with a full recap of all the electrolytics and any tantalums (didn't see any pants in the photos). As already mentioned, they tend dry out and drift in value over time. Then I'd check the power supply to see if it's getting proper DC values.If all that checks out...

I imagine it will be a few years months weeks before these are available?

Those would work nicely for the "Soft" control, but the "Tone" control needs all three leg of the trimmer.

I'd attach one leg of the trimmer to the matching pot leg location and fly the other two with small wires/jumpers; then add a touch of hot glue or Alien Tape to stabilize. Nice is not always as important as function IMO.

Love me some Tim Tam bars. I get 'em from Amazon. I wonder if anyone has ever gooped a circuit with chocolate. (?)

Currently working on one of these for my grandson. For an easier read, I merged the two page schematics into one.

I just use ⅜" inside tooth lock washers between the jack and the enclosure. They dig in nicely with no need to sand or scrape. They're cheap.

And this morning I finally get response from Win-Source; a small questionnaire for which to reply . . . . "Thank you for your interest in requesting samples from us. To help us review your request more efficiently and support you in the most suitable way, could you please share a bit more...

So here it is only 6 am on Sunday morning after registering with Win-Source.net with a brand-spanking new GMail account, and according to GMail . . . . . I now have 6 different cloud storage accounts, 2 MS Office & 8 McAfee subscriptions, 8 different streaming & 2 different phone services, and 2...