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c- c+ on old battery radios
#5

Um, Your pictures are so revealing Icon_rolleyes

Missing knobs, no cabinet, missing battery nuts both on your power supply and on the radio.

The power supply looks like an early Gary Schneider model, good unit... Not many around...

That said where are your tubes and some good advice:

Check the DC resistanc of the intestage audio transformers, Freshmans are "notoriously" open...

Any connection to power must always follow a protocol to keep from blowing out the filaments of the radio.

Never try to cheat with clip leads, these often will not pass the filament current and may short at the clip, that could be a disaster...

Always connect the filament first and preset the power supply filament voltage. For '01as set for 6-6.6 volts do not get fooled because the tubes are 5 volts. The rheostats drop the voltage and provide bias as well as regulation o  tube emission (volume).

Then look at the "B" voltages, be very careful in setting these up and always have the tubes out until the connections have been checked and voltages confirmed.


You can fabricate you own battery cable. choose at least #16 to #14 for the filament circuit. The other wires can be 20 ga. All voltage drop for the "A" circuit should be in the rheostats not the wiring...

GL

Chas

Pliny the younger
“nihil novum nihil varium nihil quod non semel spectasse sufficiat”


Messages In This Thread
c- c+ on old battery radios - by corey12 - 11-06-2019, 10:00 PM
RE: c- c+ on old battery radios - by mikethedruid - 11-07-2019, 12:46 PM
RE: c- c+ on old battery radios - by Chas - 11-07-2019, 03:40 PM
RE: c- c+ on old battery radios - by corey12 - 11-07-2019, 04:10 PM
RE: c- c+ on old battery radios - by Chas - 11-07-2019, 06:59 PM
RE: c- c+ on old battery radios - by corey12 - 11-07-2019, 08:36 PM
RE: c- c+ on old battery radios - by Chas - 11-07-2019, 09:38 PM
RE: c- c+ on old battery radios - by corey12 - 11-08-2019, 09:23 PM



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