Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

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



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
trying to identify this wire type
The red wire is rubber covered wire. The others are cotton braid over rubber often in colors or a tracer, also strand...Chas — 02:43 PM
trying to identify this wire type
Greetings Phorum members, Hope you can help me identify this type of wire in the photo I have attached.  I am not sure ...georgetownjohn — 01:53 PM
Philco 60 Squealing
All correct shields must be in place, all tubes correct no subs of any kind. Check any soldered, riveted ground conne...Chas — 01:24 PM
Philco 60 Squealing
I have recapped and replaced out of tolerance resistors and so on. Radio plays nicely on fairly strong stations. The pro...dconant — 10:55 AM
Philco 46-420 Code 121 Reception issues
Welcome Eric, I agree with Bob and far as the two main electrolytic filter capacitors did you change them yourself or w...radiorich — 11:43 PM
Philco 46-420 Code 121 Reception issues
You mentioned the Philco manual and going through the check points...just to be sure we're on the same page here's the m...klondike98 — 08:13 PM
Philco 42-1008 conversion kit
Interesting. I haven't seen that before.klondike98 — 07:02 PM
12' Philco
Yes I had looked for it on the web as well some time back and could not find it. I was glad to see it turned up in Ron'...klondike98 — 06:59 PM
Shadow Meter Bulb
Now if you had a set with a tuning light then the bulb type is important to the circuit, some sets used those prior to t...Arran — 04:58 PM
Shadow Meter Bulb
Ok. Thanks for the correction.RossH — 03:09 PM

[-]
Who's Online
There are currently 4525 online users. [Complete List]
» 1 Member(s) | 4524 Guest(s)
Avatar

>