[klondike98]

A bit more work on the Motorola. I got the repro battery together right up until I realized the snap clips on the top of the battery are larger than the ones we see today on 9v batteries. I'll have to look around for some. I used the file on vlad's site and then pasted the paper onto a manilla file folder. That seemed to be just about the right thickness for the box. Just be sure the image you print is the 7" x 10" that is noted on the file. That gives just the right size box.

[Image: https://www.dropbox.com/scl/fi/j7fs3kx30...bz4v&raw=1]
[Image: https://www.dropbox.com/scl/fi/cs38e4519...qxqr&raw=1]

I did wind up replacing the 160 ohm wirewound resistor with a 200 ohm wirewound 5 watt resistor. That gave just about the right voltage drop after substituting a 1N4007 diode into the circuit. The resistor does get pretty warm but the current flow seems about right 100mA with a 20v drop across the resistor. I'm getting 7.5v on pin 7 of the 3S4 tube (schematic calls for 7.9v) and 67v on the plate of 1R5 (nominal is 70v).

At this point I powered up the radio in AC power mode and was able to very faintly hear some stations but it is very weak and somewhat garbled. I did a quick check of alignment but that did not seem to be the issue so something else is going on. I will try power up with the A and B batteries rather than AC and see if that makes a difference. If not, I'll go back and recheck wiring and try some signal tracing through the radio.