Information on Kenyon plate transformer

[wb3eii]

 One of my Craigslist finds is a plate transformer.
 Made by Kenyon Transformer, It is a "Type S 13342".
 It has dual primaries, 120-240, and the output is 1400-0-1400.
 This weighs somewhere around #150, seems to be in good shape.
 I am currently using it to drive my 4-1000a amp,  when I drive it hard, I can hear the transformer sing.(is this an issue)?
 Does anyone have an old Kenyon catalog?
 I am curious what the amperage ratings are.
 73 AB3HT

[KE6DF]

I think the S series Kenyon transformers were custom designs for OEM customers.

I have never found anyone with a catalog for them, and doubt one exists.

You might go the T series catalog (from the Web) and compare it to one of those of similar size and weight.

That should give you an idea of the current rating.

Dave

[Opcom]

Singing my not mean anything. A rule of thumb is to load it until the AC voltage drops to 90% if the unloaded value, that is about the current rating.

What circuit are you using for the rectifier?

[KA2DZT]

Five digit part numbers are specials.  They're not regular catalog models.  Just guessing, 2800V CT at 150Lbs, it's probably close to an amp current rating, maybe more.

Fred

[wb3eii]

"What circuit are you using for the rectifier? "
 Full wave ,center tap, capacitor filter.
 Cap bank is a bit large, 14 cans in a row,(7 on each side of center) 450volt electrolytic, 2400 mf each.
 Bleeder resistors are 3 units each of 5watt 100k ohm ceramic, parallel connected across each cap.(42 resistors total)
 73, AB3HT

[Opcom]

Do you mean A or B or something else? I am confused by having a cap bank on each side of CT and having a FW CT setup.

anyway, 'talking' may be due to the cap input filter. The peak secondary currents could be large maybe 5A.

[wb3eii]

Diagram "A" is the setup.
 I had worried that the  2400mf caps would be a problem, but I had a few hundred of them, sold most at hamfests over the years, used what I had left.
 Amp runs fine, no issues in the 2 years I have had it.
Most of the time,I can not make the iron sing, as I drive it only to about 1200 watts output.
 73, AB3HT

[The Slab Bacon]

Be wary of running that transformer with a doubler or bridge setup. Running the center tap that high above ground could cause an insulation breakdown failure.

I learned this the hard way and fried a couple of nice plate transformers.    

Figure "B" is really the prefered way to run those old transformers unless you know that they were specifically rated for FWB use.