Has anyone ever heard of Rechargeable Transmitter Elements in a 302 ??

[Dan/Panther]

Rechargeable elements in 302 phone ? I didn't want to dispute the claim, as I wasn't sure.
D/P

http://tinyurl.com/9np3h66

[LarryInMichigan]

The early F1 elements that I have do have a threaded part on the back with dimples on the sides and could presumably be unscrewed.  I have two in front of me now, one dated 2/37 and the other from 39.  I haven't tried to dismantle any.  I would most likely destroy them if I tried.

Larry

[K1WI]

Dan/Panther
   Almost all ( but not all) of the early F1 transmitters I have are the screw on type .Years ago I did replace the carbon in one that was water damaged , and it worked great.   I do have one later unit dated 4-42 with a screw off cover , it is very odd as it is not flat backed like most of the F1 with screw off covers , and is stenciled F2. This transmitter was in a solid , not lighteight F1*, Ivory handset that also has black contact springs. Anyone have a clue what this handset was used for ?

   As always , thanks to all on this forum     I've learned so much here.


    K1WI           Andy F

[Phonesrfun]

I don't think the screw-on terminals were for field replacement of the carbon.  I believe it was just the best practice at the time for manufacture.  For us experimental-types, it isa bonus.

[rdelius]

F-2 local battery sets such as field telephones or magneto exchanges

[K1WI]

Bill thanks for the info on the F2 transmitter unit, Always wondered its purpose.  Strange that it was in that odd F1 ivory handset. Found it in a C.O. unused in unmarked box. I have two F2 units  but this one has a screw off back and the F1 marking has a line through it and restenciled F2.

[K1WI]

   Phonesrfun ,
   I agree  , it's hard to imagine a repair tech replacing the carbon on a subscribers kitchen table.  Just the original design later changed for ease of manufacture , and cost , to the crimp on back.
   But I do remember little manila packets marked with a KS or ED/AD number in the parts cabinets in Central Offices many years ago that had a clear envelope of carbon granules used for repairing transmitters and microphone units.  I do remember the "old timers" referring to it as "coal" .

   K1WI   Andy F