BREADBOARD POWER SUPPLY

     One of two identical units needed for the ARRL rig in "Building an Amateur Radiotelephone Transmitter" and a nice example of later breadboard construction.  Mine follows the original as closely as I could manage, with the addition of a fuse and front-panel switch.

     Still dangerous, despite a smear of white paint on the neutral side of the AC plug so you can get it in the socket right way round and a ground terminal connected to the shells of the transformer and choke to hook to station ground.  Making it child- and pet-safe can be done but you'd need some ingenuity, especially if maintaining a period look is a goal.

     This one checked out at over 500V with a capacitor-input filter -- those 630 Volt Solen Fast filter condensers suddenly don't seem all that extravagant!  I changed to choke-input (look closely and you can tell) and the output is still too high for the application: the transformer dates to before Hammond changing to a tapped 115-125VAC primary and the HV secondary was high-ish to start with.  So it'll have to be replaced by the next step down.  Good thing I hadn't built both of them.

     Too bad I'd already bought two transformers.  Hey, extras for the next project -- might even be big enough for the Harvey-Wells Bandmaster power supply that needs built.