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Old 24th January 2013, 09:01 PM   #1
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Default Power transformer question

I have a transformer that is 740 v ct
And has two separate secondaries that are 7V.
Can someone explain how these would be used?
Thank you in advance.
I will post a sketch.
Johnny K
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Old 24th January 2013, 09:04 PM   #2
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Click the image to open in full size.
Here is my sketch
Thank you, Johnny K.
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Old 24th January 2013, 09:05 PM   #3
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They are probably 6.3 volt windings. The voltage will be a bit high if the windings are not loaded.
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Old 24th January 2013, 09:18 PM   #4
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Thank you Frank.
I am going thru a plethora of iron and seeing what's what.
I am getting pressure to make room by my better half.
Thanks again!!
Johnny K
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Old 24th January 2013, 09:23 PM   #5
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Okay, so to take my question another step further......
Can you think point me in a direction for a preamp that I could use this on?
Or should I use the search button? Hehe
Thank you.
Johnny K
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Old 25th January 2013, 02:52 AM   #6
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I'm sorry for such a "broad" question.
I was in a self imposed rush for no reason. It must be the ADD !
I will sketch something up and hopefully will get a critic on a design.
I have built a few "Frankenstein" preamps- but always based on someone else's design.
Want to build something from the ground up with the iron and tubes I have. Unfortunately I have no output transformers. - so another preamp.....
Thanks
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Old 25th January 2013, 02:59 AM   #7
AJT is offline AJT  Philippines
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looks like you have a big traffo there, a preamp with power amp can be built with that...
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Old 25th January 2013, 03:11 AM   #8
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No OPTs'?......Keep looking! If your burn't out on pre-amps consider an amp itself. Perhaps you can swap iron with someone.??
Does the TX in question have any ampere ratings????
If indeed it is a "monster"....you have wide-open possibilities!!!

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Old 25th January 2013, 04:42 AM   #9
DUG is offline DUG  Canada
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Direct drive ESL

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Old 25th January 2013, 05:59 AM   #10
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Click the image to open in full size.
It probably came out of a piece of test equipt. Not sure but seems to be quality.i would like to use it.
I would love to find someone interested in a trade so I could get some OPT's
I haven't brought it up but I have quiet a few tubes I could trade. But anyway.
Thanks fr everyone's input.
I find it unbelievable the amount of help that is available on this forum.
You guys can really make me feel lazy sometimes! Haha
Thanks, Johnny
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