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 Post subject: Unused transformer secondary ... bucking transformer?
PostPosted: Jan Thu 11, 2018 1:32 am 
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Joined: Jan Thu 24, 2013 11:50 pm
Posts: 2714
Location: Bristol, Rhode Island
Hi all,

I'm wondering how feasible it would be to use half of the 25v winding shown here as a bucking transfomer, to bring the incoming AC down 12 volts or so?


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 Post subject: Re: Unused transformer secondary ... bucking transformer?
PostPosted: Jan Thu 11, 2018 2:48 am 
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Joined: Nov Mon 02, 2009 7:01 am
Posts: 2441
Location: Lincoln City, OR
Greetings to Diverted and the Forum:

It might be possible, however.... the heater current for a 25Z6 is .3 amperes. This is probably what the wire used to wind this particular secondary is sized for. Three-tenths of an amp at 120 volts is only 36 watts. If your radio is rated at more than that, it will draw more than .3 amps.... and likely over-temp that filament winding.

Regards,

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Jim T.
KB6GM


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 Post subject: Re: Unused transformer secondary ... bucking transformer?
PostPosted: Jan Thu 11, 2018 5:05 am 
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Joined: Jun Fri 19, 2009 6:34 pm
Posts: 7415
Location: Long Island
Not clear what you intend to do here. How are you going to get half of the 25-volt winding? It's not tapped according to the schematic.

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"Hell, there are no rules here--we're trying to accomplish something!"

Thomas A. Edison


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