The Ware for October 2022 is shown below.
I think there should be ample clues in the first picture to guess the ware, but I included a couple of close-ups of the circuits because I love it when circuit boards document their functions so clearly. You can basically read the schematic directly off the traces. I also enjoy the motif of “here’s a ROM but no microprocessor” (the ROM is the ceramic-packaged 2716 in the top right of the first photo, with the label covering the UV erase window). ROM-based sequencers/FSMs and lookup tables were fairly common for this vintage, but these days most designs use ROMs exclusively to store code that is accessed by a CPU.
Based on the PCB silkscreen and front panel connectors I’d say it’s a Wavetek model 75 arbitrary waveform generator.
Kudos to jackw01. Wavetek was a good hint, but it seems to be a Model 22.
https://www.flickr.com/photos/eevblog/albums/72157632878302596
Veeerrry close. It’s not a Model 22. I had to dig up some old service manuals and compare the diagrams, but there is a subtle difference between the one shown here and the Model 22, and I’ve confirmed the difference is visible in the photos posted. It’s super-subtle. But, I will accept this as the answer if nobody else can find the difference.
Ha, you are right. Its a Model 21. The 22 has additional components labeled “Log Converter”. U22 / R35 etc. No that I know or can guess what they do :-)
That was quick :)
I had noticed some differences in the silk screening, but thought this was due to board revisions.
The hint helped a lot ;-)
… that was supposed to say “U24 / R36”
I’m wondering about what PCB fab process results in black silkscreen lettering that goes right over bare solder pads. Like the C and R where it says “CURRENT SWITCH.”