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audio woes on the 38-5
Ron Ramirez
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Posts: 13,776
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Joined: Sep 2005
City: Ferdinand State, Province, Country: Indiana
#7

01-27-2018, 12:12 AM
In this radio the 6J5 is used as a dual diode - the plate and cathode make up one of the diodes, and the grid and cathode is the other diode. One is used as the set's 2nd detector, the other for AVC. It is normal for the 6J5 plate to read 0 volts (or an extremely low voltage of 1 volt or less, likely less).

Also, a 6J5 has no screen grid, just a control grid. Again, in this application, the voltage will be zero, or very low.

Edit: As for the electrolytics...(64A) and (66) should read a negative voltage to ground (chassis). Ditto the positive lead of (64).
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Ron Ramirez
Ferdinand IN
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Messages In This Thread
audio woes on the 38-5 - by NostalgiaRadioTime - 01-24-2018, 11:30 PM
RE: audio woes on the 38-5 - by morzh - 01-24-2018, 11:56 PM
RE: audio woes on the 38-5 - by Radioroslyn - 01-26-2018, 01:15 PM
RE: audio woes on the 38-5 - by morzh - 01-26-2018, 02:41 PM
RE: audio woes on the 38-5 - by Ron Ramirez - 01-27-2018, 12:12 AM
RE: audio woes on the 38-5 - by Radioroslyn - 01-27-2018, 12:49 AM
RE: audio woes on the 38-5 - by morzh - 01-28-2018, 10:53 AM
RE: audio woes on the 38-5 - by Steve Chambers - 01-28-2018, 11:14 AM



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