I have a old military radio (ARC-5) that requires a power supply for its operation, normally provided by a generator. I have seen small torroid based power supplies that include a 2 transistor flip flop driver for the torroid that produces this.
I have since lost this article, and would like to know if anyone knows how to wind a torriod to produce the following voltages:

• +HV (High Voltage): Must be between 200 and 250 VDC
• LV (Low Voltage): This is a receiver's filament voltage.
• Three different filament voltages (25.2 VAC, 12.6 VAC, and 6.3 VAC) should be available for powering ARC-5 receivers.
• Thanks in advance for any help

 

Not sure but ARC-5 related in the CQ magazine can be helpful. You can search there. Here is also a command set. https://www.scribd.com/doc/225935431/Compilation-of-CQ-Articles-on-ARC-5-Command-Sets

 

Hello,

Does this page tell you more about the arc 5?
https://www.skywaves.ar88.net/homebrew/ARC-5_PS/ARC-5_PS.html

Bertus

 

Hello,

Does this page tell you more about the arc 5?
https://www.skywaves.ar88.net/homebrew/ARC-5_PS/ARC-5_PS.html

Bertus

Yes this is invaluable for hook up, but alas, it assumes that the dynamotor is installed and producing the voltages required

 

Hello,

Perhaps the following pages might interest you:
https://k6jca.blogspot.com/search/label/ARC-5 Receiver -- BC-454-B
https://k6jca.blogspot.com/2023/11/bringing-arc-5-receiver-back-to-life_28.html

Bertus

 

Been more years than I care to remember but my first novice rigs were ARC 5 units circa 1963. The finals are 1625 tubes having 12 volt filaments. The 1625 filaments were wired in series so we changed the final filaments to parallel and used 12 volts. Next, from memory Next you need about 200 maybe 250 volts for the oscillator and screen voltages but you will want about 600 maybe 650 volts for the final plates, the 1625 plate voltage. This is all for the ARC 5 transmitters. When I was a kid and young novice I was fortunate to live around endless surplus stores in NYC and could buy an ARC 5 for 5 bucks. The transmitters were great with a few modifications for ham use. You bought them for the different ham bands and as a novice back then could not use a VFO so my ARC 5 transmitters were modified for crystal control. While my ARC 5 stuff is only memories I still have an old R392 receiver. The ARC 5 transmitters were originally powered by a dynamotor on the aircraft they were used in.

I agree with Bertus in that old QST Magazines had articles on how to do the conversions including replacing the large coil used for antenna tuning. A Google of ARC 5 power supplies should bring up some data. I never worked with the ARC 5 receivers. You may find this useful.
Bringing an ARC-5 Receiver Back to Life, Part 2 (An AC Power Supply)

Ron