Ge 21c3461

[bandersen]

Even better, after many months of searching and losing out on to auctions, I finally scored a remote control





I popped in a 9 v battery and was able to pick up a signal by laying a scope probe near the unit. Probing directly inside resulted in these two waveforms.

Carrier around 325 kHz


AM modulation around 400 Hz


I wasn't sure it was working correctly until I found very in depth info in Riders vol 27. Here's the schematic. Clever how they got a single transistor to oscillate both at RF and audio frequencies.

Once I get the TV set inside, I'll find out if it really works