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Philco Battery pack 41-8007
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03-13-2008, 10:10 AM
Hi Ron,
If I'm reading the schematic right,the 900 ohm resistor in question is placed in parallel with -9vdc section(via the on/off switch) when the radio is in operation-quite a load on that battery!The AC pwr supply I'm building is actually on the radio chassis itself and is intended to eliminate all the batteries.I plan on using a voltage divider off the center tap of the B+ supply to chassis ground to develop the the negative bias voltages for the audio stages.What I need to know is this 900 ohm resistor necessary with this configuration?
73 de Bill
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Messages In This Thread
Philco Battery pack 41-8007 - by Guest - 03-11-2008, 10:35 AM
[No subject] - by Ron Ramirez - 03-12-2008, 06:51 PM
Philco 41-8007 - by Guest - 03-13-2008, 10:10 AM
[No subject] - by batterymaker - 03-14-2008, 10:02 AM
[No subject] - by batterymaker - 03-14-2008, 10:06 AM



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