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fada ra
5/1/2006 6:31:32 PMhoward brammell
The Fada model RA vintage 1939. The diagram of the 12E speaker shows an output Trmsfr on the right side, and what looks like a choke on the left side. has been hot and needs to be replaced The diagram is blurred, and unable to determine part number, or the value. any ideas?
5/1/2006 7:37:09 PMNorm Leal
Hi Howard

If the speaker field has been hot it was caused by something drawing too much current. Unless it's open shouldn't need a replacement. Replace filter caps and look for anything else drawing too much current.

The output transformer needs to match push-pull 47 tubes. Only replace it if open. Universal output transformers are available which have taps to match your speaker.

Norm


:The Fada model RA vintage 1939. The diagram of the 12E speaker shows an output Trmsfr on the right side, and what looks like a choke on the left side. has been hot and needs to be replaced The diagram is blurred, and unable to determine part number, or the value. any ideas?

5/2/2006 12:22:46 AMhoward brammell
:Hi Howard
:
: If the speaker field has been hot it was caused by something drawing too much current. Unless it's open shouldn't need a replacement. Replace filter caps and look for anything else drawing too much current.
:
: The output transformer needs to match push-pull 47 tubes. Only replace it if open. Universal output transformers are available which have taps to match your speaker.
:
:Norm
:
:
::The Fada model RA vintage 1939. The diagram of the 12E speaker shows an output Trmsfr on the right side, and what looks like a choke on the left side. has been hot and needs to be replaced The diagram is blurred, and unable to determine part number, or the value. any ideas?
5/2/2006 4:07:03 PMThomas Dermody
Definitely check all capacitors in that radio. None of them should have any leakage. Leakage in the millions of ohms is acceptable for electrolytics. Any trace of leakage at all in other capacitors is unacceptable. If your meter's needle swings up at all, it must fall back to EXACTLY where it started. If it lingers above infinity by even the thickness of a hair, the capacitor is faulty. You will notice this when you disconnect the meter's leads from the capacitor. If the needle falls further, replace the capacitor. DO NOT confuse leakage through your fingers with actual capacitor leakage. DO NOT touch both meter leads at the same time, and be sure to not touch the radio's chassis or other wires or parts, as this can throw off readings, too.

Thomas



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