[kbmuri]

Thanks refill

I stand corrected on the BR-1. There may be some gray areas. The Beltron restorer was originally produced by Appleway electronics, then for a long time was owned by Edtron Instruments, inc, and then by Conway Manufacturing, inc (and then by Conway Engineering, inc). I believe by the time Conway was manufacturing it, they stopped supporting the BR-1 and removed it from all their documentation. My 8080 is a Conway version. There's no reference to a BR-1 in the setup manual or the adapter spec manual.

I have a Conway document called "Beltron System Universal Adapter". It lists pinouts for:

BR-2
BR-3
BR-4
BR-5B
BR-6
BR-8
BR-9
BR-10
BR-12
BR-14
BR-15
BR-17
BR-19
BR-21
BR-23
BR-25
BR-26
BR-28
BR-29
BR-30
BR-31
BR-32
BR-33
BR-34
BR-35
BR-36
BR-37
BR-38
BR-39
BR-40
BR-41
BR-42
BR-43
BR-44
BR-45
BR-46
BR-47
BR-P1
BR-P2
BR-P3
BR-P4
BR-P5
BR-P7
BR-P8
BR-P9
BR-P10
BR-P11
BR-P12
BR-P14

A page for "BR-1" is conspicuously missing. It's not clear what the BR-P** variations are for, but the BR-P1 is for a B/W crt. I can only assume that by the middle 1980's there was no market to support restoring any more 21AXP22's.

I'm pretty confident in my octal-to-crt pinout for the BR-3 (10BP4-ish socket) as written above. The BR-2 pinout, maybe take with a grain of salt.

refill, if you would be wiling to write up a pinout for your BR-1 adaptor, it would really be helpful. If the 8080A is a better restorer, I would like to start using mine instead of my 2972, which means another recap, and then making some adaptors myself. I would likely just make several of them from old Octal tube bases and eliminate the intermediate AMP plugs altogether. A point-to-point scope of a known original adaptor seems critical at this juncture. Hope you can help us out...