Classic Rotary Phones Forum

Telephone Identification, Repair & Restoration => Telephone Component Identification => Transmitters, Cups, Arms & Faceplates => Topic started by: countryman on February 20, 2021, 11:07:03 AM

Title: Early transistorized transmitters
Post by: countryman on February 20, 2021, 11:07:03 AM
In a lot of "stuff" I received about a dozen really old transmitter capsules made by Krone (Berlin, Germany) lately. I never knew these were made that early. They are dated '72, '73 and mostly '77.
With my obsession for transmitters I am quite happy with the find :-)
They look just like carbon capsules but are heavier. Only after they worked very well I started researching what they are - definitely electronic because they are nonconductive below ~2 Volt (from the passage through 3 silicone elements, 2 diodes and a transistor).
Krone capsules weren't widely used and later transistor types were manufactured by other companies.
Here's a link to a German forum (https://www.wasser.de/telefon-alt/forum/index.pl?job=thema&tnr=100000000006247&seite=1&begriff=&tin=&kategorie=) with wiring diagrams. Any other transmitter fetishists  ;D?
Title: Re: Early transistorized transmitters
Post by: RB on February 20, 2021, 01:34:30 PM
Not a fetish, but i do like good sound.
I have a couple mis matched " i assume" transmitters in a couple old phones I have.
The over all volume in the other phone is low in most connections. ???
And in a couple cases, quite low, or non existent. >:(
I would like to find solutions for these phones because, well, I just hate crappy sound lol.
If those things are German, I can't imagine them soundin bad ;)
Title: Re: Early transistorized transmitters
Post by: dsk on December 28, 2021, 09:51:14 AM
Looks like I have found a seller that may be of interest for you???  https://www.ooh-ya.com/suchen_index.html?keywords=Transistor-Sprechkapsel&submit= (https://www.ooh-ya.com/suchen_index.html?keywords=Transistor-Sprechkapsel&submit=)
I have tried to write about my transistorized transmitter capsules here: http://www.classicrotaryphones.com/forum/index.php?topic=23321.msg233918#msg233918 (http://www.classicrotaryphones.com/forum/index.php?topic=23321.msg233918#msg233918)