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Technical Topics => Equipment => Topic started by: Telegrapher on April 05, 2019, 2104 UTC

Title: Need help with dynamotor
Post by: Telegrapher on April 05, 2019, 2104 UTC
Hello, I have a dynamotor thats isnít running smooth like it used to be. I donít know how to remove it from the cabinet. Iíve tried every screw on the outside of the panel but something is keeping it unable to pull out of the radio. If someone knows how to remove it or tips for repairing it let me know.

Hereís an overview below:

https://imgur.com/gallery/HneuwdG

Kind regards, Telegrapher

Title: Re: Need help with dynamotor
Post by: Josh on April 05, 2019, 2238 UTC

Zoinks! You've taken a wrong turn.

Let's split up, gang. If you're looking for an image, it's probably been deleted or may not have existed at all.

If you are looking for groovy images, visit our gallery!
Title: Re: Need help with dynamotor
Post by: Telegrapher on April 05, 2019, 2300 UTC
The images donít really show any kind of usefulness. The thing is when I my the radio on itís left the motor starts running again. Then slowly turning it back to its main position the motor starts to stop slowly. Now itís running with a lot of spark noise in the rf spectrum. Kinda like the same sound of putting 2 wires to each other ( - and + ) to create sparks which sound the same as the entire motor sounds at the moment for nearly two hours of operation. Maybe this old radio has seen its last days. Probably ending in the trash.
Title: Re: Need help with dynamotor
Post by: radiogaga on April 05, 2019, 2309 UTC
Looks like it is bolted from bottom.
https://www.instructables.com/id/reviving-a-WW2-dynamotor-how-tube-radios-went-mob/

rgg
Title: Re: Need help with dynamotor
Post by: Josh on April 05, 2019, 2321 UTC
or mebbe one of these;
https://www.youtube.com/watch?v=3kxQAG3kQAA
Title: Re: Need help with dynamotor
Post by: Telegrapher on April 15, 2019, 1355 UTC
Its a old BC-348 receiver from Russia. Iíve unplugged the whole thing and itís now in the corner of my shack till I find out when to repeat it. I probably bring it back to the guy I bought it from as he makes and collects old surplus radios since the end of the war. So I hand it over to him as he has all the knowledge of it. Once Iíve seen how he dismantled the radio then I can save it in my memory and do it by myself next time. The dynamotor needs to be cleaned with fresh grease after about 1000 hours of use. This thing has been silent for ages. Anyway itís a nice lesson for me to learn about old radios. I hope I can do the work all on my own in the future when I am full of knowledge about circuitry and beyond. But for now I just need some practical viewing to see how itís done. :)