Comments on: Stancor Amplifiers and Full Transformer Data c.1937

By: Jesse Menefee

Jesse Menefee — Tue, 27 Dec 2011 20:20:30 +0000

I am in search for a copy of UNIVERSAL RECTIFIER TRANSFORMERS (Bulletin

#518-R, Dated 15 July 1972).
RT-201 – 202 – 204 – 206 – 208 – 2012 – 400 – 401 – 402 – 408 and 4012. I have
used the R-201 & 202 on my model railroad layout. During the move from California to here they for some reason came up lose. If you can help with the above reference list plus where I can acquire them, please let me know. Thank you, Jesse

By: Doug Williams

Doug Williams — Sun, 20 Nov 2011 19:24:58 +0000

Good catalog, kinda like the Thordarson manuals of the era, some of the early UTC too.

By: Roger Russton

Roger Russton — Sat, 29 Oct 2011 04:07:23 +0000

I was fortunate in that I had a lot of old transformers to experiment with WITHOUT having data on them so I had to learn to figure out what they were by testing. That was invaluable experience.

Generally, with a sine wave generator and a DMM you can figure out 99% of transformers as to intended function and the necessary specs. Power throughput is generally a matter of weight, then you test for temperature rise to see if it’s what you need in terms of capacity.

But it’s a lot of fun to read the manuals too-as long as you understand they were trying to sell transformers! Ed Romney in his “Fixing Up Nice Old Radios” has some very useful catalog excerpts and comments. He is dead and I believe his widow is as well, now. I hope someone reprints his books.