Philco 41-601 - hum but no radio sound

Register

Guest Join Us

Hello Guest,

Please feel free to join us!
There are many more parts of the Phorum that only members can see.

Thread Rating:

0 Vote(s) - 0 Average
1
2
3
4
5

Linear Mode

Philco 41-601 - hum but no radio sound

BrackenMan
Junior Member

Posts: 11
Threads: 3
Joined: Nov 2022
City: Poulsbo State, Province, Country: WA

#14

09-01-2023, 07:34 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.

Attached Files Image(s)

09-01-2023, 07:25 PM

Find

« Next Oldest | Next Newest »

Messages In This Thread

Philco 41-601 - hum but no radio sound - by BrackenMan - 08-23-2023, 01:46 PM

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

RE: Philco 41-601 - hum but no radio sound - by MrFixr55 - 08-23-2023, 05:16 PM

RE: Philco 41-601 - hum but no radio sound - by BrackenMan - 08-24-2023, 12:21 PM

RE: Philco 41-601 - hum but no radio sound - by BrackenMan - 08-27-2023, 02:18 AM

RE: Philco 41-601 - hum but no radio sound - by Radioroslyn - 08-27-2023, 01:04 PM

RE: Philco 41-601 - hum but no radio sound - by MrFixr55 - 08-27-2023, 09:15 PM

RE: Philco 41-601 - hum but no radio sound - by Radioroslyn - 08-28-2023, 11:57 AM

RE: Philco 41-601 - hum but no radio sound - by MrFixr55 - 08-28-2023, 05:08 PM

RE: Philco 41-601 - hum but no radio sound - by MrFixr55 - 08-28-2023, 06:34 PM

RE: Philco 41-601 - hum but no radio sound - by MrFixr55 - 08-28-2023, 07:04 PM

RE: Philco 41-601 - hum but no radio sound - by BrackenMan - 08-29-2023, 02:37 AM

RE: Philco 41-601 - hum but no radio sound - by BrackenMan - 09-01-2023, 07:19 PM

RE: Philco 41-601 - hum but no radio sound - by BrackenMan - 09-01-2023, 07:34 PM

View a Printable Version

Users browsing this thread: 2 Guest(s)