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46-1226 run 122 with squeal
Jim Dutridge
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Posts: 290
Threads: 54
Joined: Mar 2007
City: Toledo State, Province, Country: OH
#4

12-21-2010, 01:52 PM
Squealing problem has been solved. Thanks to a post on this radio over on ARF, I found that the output transformer had been replaced at some point and they had reversed the primary leads. This led to the radio having positive feedback instead of negative. What actually clued us in was by grounding the bottom side of the volume control the squealing stopped. Removing the ground with the radio powered up brought the squeal back. Reversing the primary leads solved it.
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Messages In This Thread
46-1226 run 122 with squeal - by Jim Dutridge - 12-21-2010, 09:11 AM
Re: 46-1226 run 122 with squeal - by Ron Ramirez - 12-21-2010, 09:37 AM
Re: 46-1226 run 122 with squeal - by Jim Dutridge - 12-21-2010, 10:22 AM
Re: 46-1226 run 122 with squeal - by Jim Dutridge - 12-21-2010, 01:52 PM
Re: 46-1226 run 122 with squeal - by Ron Ramirez - 12-26-2010, 09:22 AM



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  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration