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Detective Edd : Can you help with this one?
10/29/2008 7:02:31 PMTonyJ
Edd:

Very impressed how you deciphered that RCA print. Maybe this one will be easier. I have a Crosley 58TK with a single IF can and on the primary side the mica cap feeds back ultimately through the tube instead of being directly in parallel with the primary coil. Any idea on why they did this? Thanks!

10/29/2008 7:03:24 PMTonyJ
Oops - print is here:
http://www.nostalgiaair.org/PagesByModel/494/M0003494.pdf


:Edd:
:
:Very impressed how you deciphered that RCA print. Maybe this one will be easier. I have a Crosley 58TK with a single IF can and on the primary side the mica cap feeds back ultimately through the tube instead of being directly in parallel with the primary coil. Any idea on why they did this? Thanks!

10/29/2008 7:51:02 PMLewis Linson
:Edd:
:
:Very impressed how you deciphered that RCA print. Maybe this one will be easier. I have a Crosley 58TK with a single IF can and on the primary side the mica cap feeds back ultimately through the tube instead of being directly in parallel with the primary coil. Any idea on why they did this? Thanks!


I would say : to save money.
Lewis

10/29/2008 11:08:12 PMTonyJ
::Edd:
::
::Very impressed how you deciphered that RCA print. Maybe this one will be easier. I have a Crosley 58TK with a single IF can and on the primary side the mica cap feeds back ultimately through the tube instead of being directly in parallel with the primary coil. Any idea on why they did this? Thanks!
:
:
:I would say : to save money.
:Lewis

One can vs. two = manufacturing savings I agree lol. I was curious more about the way the primary was wired. On the set I had, the IF can had the silver mica migration and someone suggested to measure the coil inductance to determine the cap value to give resonance at 455kHz. Problem is, it appears that there must be extra capacitance introduced by the way the primary side is wired also.



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