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Antique Radio Technical Forum
Zenith 5S56 Voltage on Chassis

Posted by Thomas Dermody on 11/26/2005 00:15

To find a short between the 110 volt primary and the high voltage secondary, simply connect your meter between any point on the two (one lead to one coil at any point, and the other lead to the other coil at any point). If you find any continuity what-so-ever, then this is your problem. You must disconnect any line cord condensers that go to the chassis, however, or any leakage present within them may give you the false notion that you have leakage within the transformer.

If the transformer functions normally, otherwise, you may simply treat the set as an AC-DC set, and try not to ground the chassis. Insert a .01 MFD condenser between the antenna and the radio. You can also disassemble the transformer and check for shorts in the wiring, though the trouble may actually be in the windings. If trouble is in the windings, then try not to leave the set on unattended. It is not likely to blow up, but if things are deteriorating, then it is best to be cautious. Still, if the transformer is functioning normally, otherwise, I don't see the need for replacing it yet. Transformers are expensive. If you do disassemble the transformer for a wiring examination, be careful, as the wiring may be fragile. If it is, either be ready with some heat shrink, or avoid disassemble. Heat shrink might not be such a bad idea, though, if the wiring is deteriorating. It may actually save trouble that might otherwise happen in the future (internal shorts).

Thomas



Zenith 5S56 Voltage on Chassis 
Will Hodges 11/24/2005 23:22 
TonyC 11/24/2005 23:58 
TonyC 11/25/2005 07:54 
TonyC 11/25/2005 08:05 
Will Hodges 11/25/2005 22:52 
Will Hodges 11/25/2005 22:53 
will Hodges 11/25/2005 23:00 
Will Hodges 11/25/2005 23:24 
Thomas Dermody 11/26/2005 00:15 
Thomas Dermody 11/26/2005 00:20 
TonyC 11/26/2005 13:23 
TonyC 11/26/2005 14:17 
Will Hodges 11/26/2005 15:30 
Thomas Dermody 11/26/2005 22:53 
Will Hodges 11/26/2005 23:47 
Billy Richardson 11/27/2005 09:37 
TonyC 11/27/2005 10:58 
Thomas Dermody 11/27/2005 14:35 
Will Hodges 11/27/2005 17:25 
TonyC 11/27/2005 18:17 
Will Hodges 11/27/2005 22:53 
Will Hodges 11/27/2005 23:04 
Thomas Dermody 11/28/2005 00:16 
Billy Richardson 11/28/2005 11:09 
Thomas Dermody 11/28/2005 12:06 
TonyC 11/28/2005 10:19 
Rick Skowronek 11/28/2005 20:07 
Thomas Dermody 11/28/2005 21:57 
Donnie Land 11/30/2005 21:39 

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