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Philco 604 Bias Cell
Radioroslyn
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Posts: 7,296
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City: Roslyn Pa
#17

03-29-2018, 10:14 PM
< the series resistor in the filament circuit gets really hot, like unpleasant to put my finger on the back side of the chassis.  Is this normal?
Yes it's dissipating about 17wts of energy (55v @.3A). That is about the same as two 50L6's.

<  Is it possible I have the wrong lamp?
To be honest I don't remember (I have a 604 but it's been a while since I've had a look at it.) Chuck had a list of the Philco p# vs standard bulb but his site lately has been just a mere shadow of what it was.There are 3.3v @ 150ma bulbs mostly used in post war RCA sets.


GL
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry
(This post was last modified: 03-29-2018, 10:17 PM by Radioroslyn.)
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Messages In This Thread
Philco 604 Bias Cell - by mboessen - 03-28-2018, 03:37 PM
RE: Philco 604 Bias Cell - by morzh - 03-28-2018, 05:02 PM
RE: Philco 604 Bias Cell - by mboessen - 03-28-2018, 08:28 PM
RE: Philco 604 Bias Cell - by PhilcoPhan1936 - 03-29-2018, 04:16 AM
RE: Philco 604 Bias Cell - by Arran - 03-29-2018, 05:12 AM
RE: Philco 604 Bias Cell - by David - 03-29-2018, 08:24 AM
RE: Philco 604 Bias Cell - by Radioroslyn - 03-29-2018, 08:44 AM
RE: Philco 604 Bias Cell - by mboessen - 03-29-2018, 09:24 AM
RE: Philco 604 Bias Cell - by 462ron - 03-29-2018, 10:12 AM
RE: Philco 604 Bias Cell - by morzh - 03-29-2018, 10:47 AM
RE: Philco 604 Bias Cell - by mboessen - 03-29-2018, 10:57 AM
RE: Philco 604 Bias Cell - by mboessen - 03-29-2018, 11:00 AM
RE: Philco 604 Bias Cell - by 462ron - 03-29-2018, 01:34 PM
RE: Philco 604 Bias Cell - by mboessen - 03-29-2018, 03:06 PM
RE: Philco 604 Bias Cell - by mboessen - 03-29-2018, 09:31 PM
RE: Philco 604 Bias Cell - by mboessen - 03-29-2018, 09:39 PM
RE: Philco 604 Bias Cell - by Radioroslyn - 03-29-2018, 10:14 PM
RE: Philco 604 Bias Cell - by 462ron - 03-29-2018, 10:30 PM
RE: Philco 604 Bias Cell - by Radioroslyn - 03-29-2018, 11:04 PM
RE: Philco 604 Bias Cell - by mboessen - 03-30-2018, 08:49 AM
RE: Philco 604 Bias Cell - by 462ron - 03-30-2018, 10:07 AM
RE: Philco 604 Bias Cell - by Radioroslyn - 03-30-2018, 12:22 PM
RE: Philco 604 Bias Cell - by mboessen - 03-30-2018, 07:41 PM
RE: Philco 604 Bias Cell - by Arran - 03-31-2018, 02:20 AM
RE: Philco 604 Bias Cell - by mboessen - 03-31-2018, 10:32 AM



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