04-22-2023, 09:16 PM
The bench power supply may not have the amps to start the vibrator. The wiring too/from must be at least #10 to the radio. Best to use a fully charged battery and the heavy wires suggested.
The buffer condenser must be replaced with a buffer rated condenser or a condenser with published dv/dt ratings. If changing to solid state the buffer value may have to be varied to prevent the SS vibe from burning out. An oscilloscope can determine the optimum values of buffer condenser. The main "B" filter condensers must also be replaced, leaking condensers will place a substantial load on the vibrator.
There is a circuit floating around for constructing a vibrator contact rejuvenator from a socket, two 120/60 watt lamps. The circuit exercises the vibrator via its contacts under a light bulb load. if either bulb does not light and vibrator does not hum it is bad.
GL
Chas
The buffer condenser must be replaced with a buffer rated condenser or a condenser with published dv/dt ratings. If changing to solid state the buffer value may have to be varied to prevent the SS vibe from burning out. An oscilloscope can determine the optimum values of buffer condenser. The main "B" filter condensers must also be replaced, leaking condensers will place a substantial load on the vibrator.
There is a circuit floating around for constructing a vibrator contact rejuvenator from a socket, two 120/60 watt lamps. The circuit exercises the vibrator via its contacts under a light bulb load. if either bulb does not light and vibrator does not hum it is bad.
GL
Chas
Pliny the younger
“nihil novum nihil varium nihil quod non semel spectasse sufficiat”
