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Lafayette Dyna-com 23 schematic
- Thread starter satellit
- Start date
Here's the schematic for the Lafayette Dyna-Com 23. If you need more info just let me know... Dan
Can't remember if that's the one with plastic screws holding down the two audio-power transistors. We adopted the habit of putting a 1N4001 rectifier diode in parallel with the thermistor "TH" in the schematic. The cathode of the diode goes to ground. Found that this prevents the audio transistors from overheating and melting the plastic screws. The transistor pulls away from the heat sink and thermal runaway follows immediately. Another good reason to make sure you have the right size fuse on these old radios.
73
73
thank you for posting.
Are there more pages of the schematics ? I don't see the synthesizer portion ?
Sincerely
P
dan:
sorry, senioritis struck again. I was thinking of a more modern radio syn, I forgot that a long time ago, radios used banks of crystals to mix pairs of xtals to synthesize the 23 channels. https://www.cbcintl.com/XTALS/AM 16965-9545-1000.pdf
Thank you
sorry, senioritis struck again. I was thinking of a more modern radio syn, I forgot that a long time ago, radios used banks of crystals to mix pairs of xtals to synthesize the 23 channels. https://www.cbcintl.com/XTALS/AM 16965-9545-1000.pdf
Thank you