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650 PM Speaker Replacement
RodB
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Posts: 990
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Joined: Feb 2015
City: Roseville, MN
#1

02-07-2015, 04:43 PM
Hello, another newbie with my first post. I'm restoring a Philco 650 and would like advice on replacing the speaker with a PM speaker. The original cone is trash. I think I can replace the field coil with a 1.2k 10 watt resistor since the field is not the power supply choke. The field coil measures 1175 ohms. I also would swap the audio output transformer for a 14k center tapped primary/8 or 4 ohm secondary for the PM speaker. Are there any other changes I should consider?

Rod
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Messages In This Thread
650 PM Speaker Replacement - by RodB - 02-07-2015, 04:43 PM
RE: 650 PM Speaker Replacement - by klondike98 - 02-07-2015, 04:56 PM
RE: 650 PM Speaker Replacement - by RodB - 02-07-2015, 05:08 PM
RE: 650 PM Speaker Replacement - by RodB - 03-07-2015, 05:39 PM
RE: 650 PM Speaker Replacement - by Ron Ramirez - 03-07-2015, 06:32 PM



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