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Clutz 15th April 2006 12:11 AM

Various transformers
 
Hi all,

I've come across a number of transformers, but I have limited information.

I've got two 110 to 550/600 volt transformers made by Flexi-core and a VA rating of 150. They were previously used in an elevator, and were manufactured in 1969.

I've also got a number of other transformers, including one big one by Hammond - but I'm not sure what it's purpose is (it only has two leads).

I also have another transformer by RCA VICTOR RENFREW. It's unclear to me what the configuration of this transformer is, but it has it's primary listed as 225V 60Hz and 150 VA, type
5286.

And I have another that is a small hammond transformer, also difficult to identify. If anyone has any suggestion as to how I could go about identifying them, I would appreciate it.

planet10 15th April 2006 03:28 AM

Re: Various transformers
 
Quote:

Originally posted by Clutz
I've got two 110 to 550/600 volt transformers made by Flexi-core and a VA rating of 150. They were previously used in an elevator, and were manufactured in 1969.
Choke loaded would give ~500 V @ 300 mA, lots of room to burn some V and enuff current for a nice power amp.

dave

ocool_15 15th April 2006 04:34 AM

on transformers you can measure the wires(with no power applied) to find which ones are connected together. Useful if you have multiple secondaries. To get a idea of the output voltages you can start with a lower voltage Ac transformer into the primary and measure the voltage out.


example
120Vac transformer primary unknown output voltage.
24Vac input into primary and gives ~5Vac on output

from the 24/5= 4.8 ratio
120vac/4.8 ratio gives a ~25vac secondary.

By using a transformer before the one under test you get to work with safer voltages and your also isolated from main power:)

Clutz 16th April 2006 03:06 AM

Thanks a lot for the help. I'll try to measure these. I don't think I'll need all of them, I've enver built a tube amp before - so I think jumping to a 600 volt one would be a bit risky. I was hoping that one of them would be a 110 to 220.

DigitalJunkie 16th April 2006 03:48 AM

The Hammond with only 2 leads is probably a choke. ;)


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