Modified 38-12 to what purpose?

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Modified 38-12 to what purpose?

Tom45acp
Junior Member

Posts: 26
Threads: 9
Joined: Dec 2019
City: Shinnston State, Province, Country: WV

#1

04-10-2022, 08:26 PM

I'm working on a 38-12 that has two modifications, one of which I don't understand.

Visit http://www.nostalgiaair.org/Resources/236/M0013236.htm for the schematics.

The modification I'm seeing is coming off the center terminal of the volume control. It consists of a 50pF mica in parallel with a 400kohm resistor which then connects to the .01 mfd cap that is shown on the schematic. After changing the filter caps and removing the modification in power supply, I turned the radio on. It works about as well as you would expect for leaky caps and many way out of tolerance resistors. I tuned in a station and listened to it then bypassed the modification. As far as I could tell, there was no difference between the two.

Does anyone have an idea as to what this modification as supposed to do?

Sometimes I wonder whether the world is being run by smart people who are putting us on or by imbeciles who really mean it.

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Modified 38-12 to what purpose? - by Tom45acp - 04-10-2022, 08:26 PM

RE: Modified 38-12 to what purpose? - by Mondial - 04-10-2022, 08:57 PM

Tom45acp - by Tom45acp - 04-11-2022, 07:04 AM

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