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Philco 604 Bias Cell
#3

Well, this lends credence to the guy who posted to just replace it with a 6 meg resistor, (this one is 4 meg) except I would have to come up with those two big, honking resistors in the power line to bias the cathode. I kind of tried to work it out and my head started to hurt trying to figure out where the filter chokes and filter caps would have to be connected in the 604 to accommodate these. At first glance, it looks like a pretty major rewiring job. I might try to figure out a way to just stick in a 600v silicone diode and a couple of resistors to get - 1 volt or so. Fired it up today and briefly picked up some short wave spanish, but no broadcast. Put in a better 75 and a better 43 and now I got nothing. Then I remembered I forgot to recap the RF unit. Took the cover off. Holy Crap!! No idea how I am going to get those replaced. Can't even get a soldering iron at 2 of them. Doesn't look good. I'm going to go up to the house, get a shot of scotch and rustle up some supper.


Messages In This Thread
Philco 604 Bias Cell - by mboessen - 03-28-2018, 02:37 PM
RE: Philco 604 Bias Cell - by morzh - 03-28-2018, 04:02 PM
RE: Philco 604 Bias Cell - by mboessen - 03-28-2018, 07:28 PM
RE: Philco 604 Bias Cell - by PhilcoPhan1936 - 03-29-2018, 03:16 AM
RE: Philco 604 Bias Cell - by Arran - 03-29-2018, 04:12 AM
RE: Philco 604 Bias Cell - by David - 03-29-2018, 07:24 AM
RE: Philco 604 Bias Cell - by Radioroslyn - 03-29-2018, 07:44 AM
RE: Philco 604 Bias Cell - by mboessen - 03-29-2018, 08:24 AM
RE: Philco 604 Bias Cell - by 462ron - 03-29-2018, 09:12 AM
RE: Philco 604 Bias Cell - by morzh - 03-29-2018, 09:47 AM
RE: Philco 604 Bias Cell - by mboessen - 03-29-2018, 09:57 AM
RE: Philco 604 Bias Cell - by mboessen - 03-29-2018, 10:00 AM
RE: Philco 604 Bias Cell - by 462ron - 03-29-2018, 12:34 PM
RE: Philco 604 Bias Cell - by mboessen - 03-29-2018, 02:06 PM
RE: Philco 604 Bias Cell - by mboessen - 03-29-2018, 08:31 PM
RE: Philco 604 Bias Cell - by mboessen - 03-29-2018, 08:39 PM
RE: Philco 604 Bias Cell - by Radioroslyn - 03-29-2018, 09:14 PM
RE: Philco 604 Bias Cell - by 462ron - 03-29-2018, 09:30 PM
RE: Philco 604 Bias Cell - by Radioroslyn - 03-29-2018, 10:04 PM
RE: Philco 604 Bias Cell - by mboessen - 03-30-2018, 07:49 AM
RE: Philco 604 Bias Cell - by 462ron - 03-30-2018, 09:07 AM
RE: Philco 604 Bias Cell - by Radioroslyn - 03-30-2018, 11:22 AM
RE: Philco 604 Bias Cell - by mboessen - 03-30-2018, 06:41 PM
RE: Philco 604 Bias Cell - by Arran - 03-31-2018, 01:20 AM
RE: Philco 604 Bias Cell - by mboessen - 03-31-2018, 09:32 AM



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