[ARC5] 28 volt transformer question ?

[Hubert Miller]

In the early 1960s I had a 'paper route' and one of my customers worked at the Army radio receiving station in the town, Lynnwood Washington.
In his small house he had his ham radio setup, which he showed me. I think the receiver was a Super Pro. The transmitter was an ART-13. He told
me about the 28 volt power it required and how many amps, and I asked how he got that, as high current low voltage supplies very uncommon in
those times. He told me he had wound the transformer himself, and I was astonished. Who ever heard of someone winding their own power
transformer?
This was in the days of "party line telephones" in Lynnwood, and when his ART-13 was on the air, his conversation was one of the ones on the phone.
-Hue Miller

On Behalf Of J Mcvey via ARC5
Sent: Tuesday, September 8, 2020 12:38 PM
To: arc5 at mailman.qth.net; Robert Eleazer <releazer at earthlink.net>
Subject: Re: [ARC5] 28 volt transformer question ?

It's very true that the "junk" available in the  60's wasn't very conducive to running a 28V rig.
I remember that nothing that I could find in the dump would come close to the voltage and current requirements to fire up a dynamotor.  I suppose modifying a couple of beefy battery chargers might have worked, but you didn't find any of those in the dump!
You need a serious supply to start a ARC-5 transmitter dynamotor while running all the other stuff!

I have an old industrial 40 amp SMPS I needed to add a bank of caps to  in order to keep it from going into OC shutdown when keying the transmitter while the whole setup was running.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/arc5/attachments/20200908/7442158c/attachment.html>