OT a little, but UTC has been making transformers since Tesla was a pup, and made a very large line of generic replacement items for basic repair work back when electronics glowed in the dark and 'computers' were folks who did low-level math grunt-work for insurance companies and big engineering firms. Having a 5v tap means 5 volt filament recitifier tubes.. 5U4, 5Y3s maybe... 850 V tap is undoubtedly center-tapped [is there a picture of the label? Most UTC replacement devices had schematics on the side...] Sounds maybe it's a replacement unit for one of the bigger tube TV sets needed a pretty high initial DC level (B+) to drive the Horizontal amps and HV section. Could also be a replacement for a Ham Transmitter from the same era. $103??? Well, if you needed it, and nothing else would fit... I guess so. That was a lot of money back then. I'm too lazy to look up UTC and the part number on the web to see if any reference data has been archived. Cheerz John

Upon the date 12:18 AM 10/28/01 -0400, Glen Goodwin said something like: Without digging through several boxes up in the library for my 1950's/60's UTC Company catalogs, I will say this is for an early 50's television - a large screen black & white or one of the early color sets. I could check if you'd like me to. I feel it is obvious this is the case based on my considerable experience with early TV's. My assumptions on the secondary lineup is as follows: 5V @ 6A for two 5U4G full wave rectifiers; 6.3V @ 4A for the damper tube heater and the CRT heater (meant to be isolated and held at a higher positive level to prevent heater-to-cathode breakdown because the cathodes would be at maybe +250 volts DC or so), 6.3V @ 8A for the rest of the tube heaters, 850V @ 430MA, 1050V @ 400 MA. for the B+ voltages. Methinks the two high voltage secondaries are a single center tapped winding with a choice of two tapped levels - depending upon the original requirements. This is apparently a replacement transformer meant to fit several different chassis. Well, if I had, for example, a 1954 RCA color TV with a bad power transformer and this was a replacement, I think I would fork over that much. Probably not more, but maybe that much. In this example I gave, the RCA CTC-1 chassis was the first color set mass produced in the States in 1954 and this USD103.50 would be worth it to me if I knew I could get a working set. HTH, -Chris -- -- Christian Fandt, Electronic/Electrical Historian Jamestown, NY USA cfandt(a)netsync.net Member of Antique Wireless Association URL: http://www.antiquewireless.org/