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Transistorized transmitters ID and suitable use.

Started by dsk, December 30, 2019, 10:22:05 PM

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countryman

Thanks for the pics! I printed front and back side to a full A4 page. I then copied the conductor paths to clear plastic, turned it around and added the components. Quite crude but it becomes clear that the circuit uses the normal bridge rectifier and a 2 stage transistor amplifier. Possibly the amplification is just too big and leads to distortion.

dsk

I have found a source for transistor transmitters, don't know the company. They have more than this, but this brown capsule is the best local battery phone capsule I ever have tested.
https://www.ofmapteka.com/mikrofonkapsel-sprechkapsel-f%E3%BCr-w38-w48-feldtelefon-fm-bundeswehr-no3-p-60191.htm

Here are lots of others, regular and transistorized:
https://www.ofmapteka.com/advanced_search_result.htm?main_page=advanced_search_result&search_in_description=1&zenid=e3lptgaa0jkin0co1vusnnbq77&inc_subcat=1&keyword=sprechkapsel


countryman

I'm afraid that looks like a fake shop, better do not make payments in advance.
-no real imprint on the page, legit German website are required to state a findable address
-weird wording on the website, it pretends to be a German business but the language style is not authentic
-there is a Paypal symbol but in fact only credit card payments are accepted.


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dsk

Thank you!
Those links are nice to have!