[ARC5] 28 volt transformer question ?

[Hubert Miller]

-----Original Message-----
From: Kenneth G. Gordon <kgordon2006 at frontier.com> 
Sent: Tuesday, September 8, 2020 2:51 PM
To: Hubert Miller <Kargo_cult at msn.com>; arc5 at mailman.qth.net; MICHAEL ST ANGELO <mstangelo at comcast.net>
Subject: Re: [ARC5] 28 volt transformer question ?

I got an ARC-1 from MARS back in the day. It had no dynamotor, but there was room on the dyno shelf for a power transformer.

It needed 24 VDC for the filaments and tuning motor. I wound enough extra #12 wire on the outermost winding, which just happened to be the 6.3 V filament winding, to get the necessary voltage and current. It just barely fit.

The transformer was from a console TV set and the 6.3 V winding was good for at least 10 amps.

Anyway, it worked.

I subsequently found that MOST small power transformers I ran across had the primary winding next to the core, and all secondaries were further out on the core.

As I remember it, the HV winding was next to the primary, and all other secondaries were further "out". I suspect there was some technical reason for this, but have not pursued this.

Ken W7EKB