Philco 41-601 - hum but no radio sound

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Philco 41-601 - hum but no radio sound

BrackenMan
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Posts: 11
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Joined: Nov 2022
City: Poulsbo State, Province, Country: WA

#14

09-01-2023, 08:34 PM

Okay, not sure where the reply went last night, we'll do it again.

As shown in the last reply, I'm testing with a modulated 100kHz signal. I'm seeing the IF, the original signal, and the local oscillator. What I'm not hearing is any output from the detector.

The test signal being sent to the loop is shown in cyan. The output from the mixer (pin 2) is shown in yellow. The input to the detector (pin 5) is shown in magenta. I'm not sure what the periodic bursts from the mixer are - their frequency is about 300Hz.

Looked for AVC: DC at pin 5 of the detector is -0.47V, at pin 6 is -0.82V. Haven't tried the 3V battery thing yet.

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Philco 41-601 - hum but no radio sound - by BrackenMan - 08-23-2023, 02:46 PM

RE: Philco 41-601 - hum but no radio sound - by morzh - 08-23-2023, 04:03 PM

RE: Philco 41-601 - hum but no radio sound - by MrFixr55 - 08-23-2023, 06:16 PM

RE: Philco 41-601 - hum but no radio sound - by BrackenMan - 08-24-2023, 01:21 PM

RE: Philco 41-601 - hum but no radio sound - by BrackenMan - 08-27-2023, 03:18 AM

RE: Philco 41-601 - hum but no radio sound - by Radioroslyn - 08-27-2023, 02:04 PM

RE: Philco 41-601 - hum but no radio sound - by MrFixr55 - 08-27-2023, 10:15 PM

RE: Philco 41-601 - hum but no radio sound - by Radioroslyn - 08-28-2023, 12:57 PM

RE: Philco 41-601 - hum but no radio sound - by MrFixr55 - 08-28-2023, 06:08 PM

RE: Philco 41-601 - hum but no radio sound - by MrFixr55 - 08-28-2023, 07:34 PM

RE: Philco 41-601 - hum but no radio sound - by MrFixr55 - 08-28-2023, 08:04 PM

RE: Philco 41-601 - hum but no radio sound - by BrackenMan - 08-29-2023, 03:37 AM

RE: Philco 41-601 - hum but no radio sound - by BrackenMan - 09-01-2023, 08:19 PM

RE: Philco 41-601 - hum but no radio sound - by BrackenMan - 09-01-2023, 08:34 PM

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