engrssc wrote:larason2 wrote: darlington transistor boards and at least one LARGE power supply to drive the Sam’s.
Based on the current draw the combined SAM's. As well appropriate large enough gauge wiring.
Rgds,
Ed
And fuses. Make sure you use fuses!
The console I'm still converting has 180 drawknobs and coupler tabs, and is powered by two Astron RS-50 power supplies wired in parallel for a total peak output of 100 amps DC. I don't know who built the console, it was either Schantz or Bunn-Minnick, but someone in their infinite wisdom wired everything up to those two power supplies with not a single fuse anywhere in the entire console. And the supply wires to the magnets are extremely close to the signaling wires.
Worse, the only thing protecting the console was an old 60 amp fusible switch in the blower room, which fed a set of #12.wires that went to the console.
It's really a miracle that this setup worked for almost 60 years. A short circuit in either the ac or dc side of the console would likely have had catastrophic results.