Need help with a transformer

Started by Govmnt_Lacky, March 09, 2012, 12:02:08 PM

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Govmnt_Lacky

I have a transformer installed in an old Sears 8 track deck and was wondering if there is any merit to pulling it out for use. Here is the info:

Part number: 2009996-16

Output wire colors: red (2), red w/ yellow stripe, green, yellow, brown

Any help is appreciated. I have googled multiple times with no results.
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teemuk

There's merit if you have, or think you have, some use for it.

Of course it would help to find out some specs about the transformer, e.g. measure turns ratio, guesstimate maximum current output etc.

petemoore

#2
   See GEO for more in depth  explanations [power supplies for effects] including how to find the DC voltage to expect after a FWR [or other] does the AC/DC conversion.
   Having an application for the transformer that 'matches' is the trick'.
  Use a dinky 2vAC [transformers don't 'do' DC] transformer to connect to a winding, this way if there's a big ratio conversion and you connect to the small side, the multiplied voltage of the 'big side' [multiplied to some high voltage] won't be as dangerous. Measure a winding from the other side.
  Use notepad to draw the windings and mark the voltages of one, then the next etc. until the transformer is 'charted'.
   The voltage input ___: compares to the voltage output :____ [input would be 2vac, output you measure..fill in the blanks to get the voltage conversion ratio which looks like 2vac:10vac [if you measure 10vac on the secondary] a 1:5 conversion ratio.
  If you put 120vac into a 1:5 ratio transformer, the output would be 600vac...starting with a small voltage helps keep any HV windings from being super HV after the conversion...since your'e testing transformers to find the conversion, small voltage is strongly recommended, the windings have a way of finding other things to connect to also, use wire caps insulate the bare winding-lead ends not under test.
  It probably supplied the audio signal processing [chips at 'low or low-ish voltage] and maybe the motor [sorta high current]...perhaps the motor could come with and find something to do...?
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PRR

If it is still in-place, follow the leads through the rectifiers to the big caps. Read the voltage on the cap. That's what you are going to get.

Do this outdoors-- old caps may boil and burst, stinky.

Lot of leads. Some may supply only AC load, primarily a pilot light. Read the AC at the pilot light and work-out the DC.
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