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40-201 oscillator not working.
#16

Tom
We know the heptode works from when you substituted the signal generator in place of the oscillator and a station came in. So I was trying to determine if the triode was conducting, and it is. It should be drawing a couple milliamps. Have you tried another tube? These are loctal tubes; have the tube pins been cleaned? If they are black or dark grey, clean them with 0000 steel wool and then alcohol. I believe the choke coil in the plate circuit was a work around to start the oscillator. It's hard to say at this point but keep it handy. I'm running out of ideas. When this happens I usually start poking around with a wooden or plastic stick to see if something is loose mostly around the tube socket.


Messages In This Thread
40-201 oscillator not working. - by Tomie - 04-30-2020, 04:15 PM
RE: 40-201 oscillator not working. - by Tomie - 05-11-2020, 11:19 AM
RE: 40-201 oscillator not working. - by Tomie - 05-12-2020, 01:32 PM
RE: 40-201 oscillator not working. - by Tomie - 05-12-2020, 01:38 PM
RE: 40-201 oscillator not working. - by Tomie - 05-16-2020, 11:35 AM
RE: 40-201 oscillator not working. - by RodB - 05-16-2020, 12:33 PM
RE: 40-201 oscillator not working. - by Tomie - 05-16-2020, 02:26 PM
RE: 40-201 oscillator not working. - by RodB - 05-16-2020, 05:17 PM
RE: 40-201 oscillator not working. - by Tomie - 05-16-2020, 06:08 PM
RE: 40-201 oscillator not working. - by RodB - 05-16-2020, 07:02 PM
RE: 40-201 oscillator not working. - by Tomie - 05-17-2020, 12:57 PM
RE: 40-201 oscillator not working. - by RodB - 05-17-2020, 06:03 PM
RE: 40-201 oscillator not working. - by Tomie - 05-18-2020, 12:13 PM
RE: 40-201 oscillator not working. - by Tomie - 05-18-2020, 01:15 PM
RE: 40-201 oscillator not working. - by Tomie - 05-18-2020, 06:09 PM
RE: 40-201 oscillator not working. - by RodB - 05-18-2020, 08:43 PM
RE: 40-201 oscillator not working. - by Tomie - 05-19-2020, 01:54 PM
RE: 40-201 oscillator not working. - by RodB - 05-19-2020, 04:56 PM
RE: 40-201 oscillator not working. - by Tomie - 05-21-2020, 07:03 PM
RE: 40-201 oscillator not working. - by RodB - 05-21-2020, 10:03 PM



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