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Post by glennnik on Sept 20, 2022 13:41:32 GMT
The pop sound still lives on. The good thing is I have the problem narrowed down to the "Trip Mechanism" solenoid and it's voltage. All of the mute circuit ( m,ma.mb ) leaf switches are all adjusted and mute circuit works, the mute circuit comes in after the trip solenoid get energized. I've manually brought in the mute circuit at record end seconds before the solenoid get's power and all is great. I've also manually trip the mechanism at the end of the record and all is good. I'm starting to wonder that maybe the solenoid coil insulation is broken down and that 30 volts is getting into the ground network that 30v is only a quick shot and no fuses are blowing. Yes I did disconnect one of the wires going to the solenoid at the coil so that means it's all clean going thru it's switches, yes to changing the 5879 tube. Thanks.
glenn
clearwater fla.
USA
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Post by armandh on Sept 25, 2022 15:41:52 GMT
if all else fails those jukes before the console era [transistor amps] where the relay mute was introduced, can add that feature
the end of record switch signal through a diode closes the mute relay.
the end of record switch signal from before the diode goes through a normally open contact on the mute relay to operate the reject
the mute contact goes directly to the mute relay to hold it mute but not back feed the trip due to the diode.
can also be done with two relays
the end of record signal pulls in a reject relay a normally open contact of the reject relay pulls in the mute relay
normally open contacts on both in series activate the reject and the mute switch holds the mute relay while the end of record signal opens
the reject relay opens thus one of the series contacts let the solenoid release
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Post by armandh on Sept 25, 2022 15:45:37 GMT
be sure that the kick back rectifier across the reject solenoid is good if all else fails those jukes before the console era [transistor amps where the relay mute was introduced] can add that feature the end of record switch signal through a diode closes the mute relay. the end of record switch signal from before the diode goes through a normally open contact on the mute relay to operate the reject the mute contact goes directly to the mute relay to hold it mute but not back feed the trip due to the diode. can also be done with two relays the end of record signal pulls in a reject relay a normally open contact of the reject relay pulls in the mute relay normally open contacts on both in series activate the reject and the mute switch holds the mute relay while the end of record signal opens the reject relay opens thus one of the series contacts let the solenoid release |
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Post by glennnik on Oct 1, 2022 23:41:50 GMT
Thanks so much to be able to send me off in a direction to see about getting rid of this pop.
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