Looks to me more like a spare tubes rack, not a "plug board" of tubes other than the fact that you plug them into the board. Imagine the wiring you'd have to have underneath if there was actual plugboard logic. Plugboards are for plug wires not tubes. It is very rare though. b
On Sat, Aug 15, 2026 at 10:51 AM DonResor via cctalk <[email protected]> wrote: > > Interesting but not anywhere near worth the asking price, I think. > > > > A lot of rust and who knows what else. > > > > Rare! Retro IBM 604 Calculator Plugboard, Pluggable Units, Vacuum Tubes - > Parts > > > > https://www.ebay.com/itm/128026803244 > > > > > > Donald R. Resor Jr. T. W. & T. C. Svc. Co. > > http://hammondorganservice.com > > Hammond USA warranty service > > "Most people don't have a sense of humor. They think they do, but they > don't." --Jonathan Winters > > > > >
