[GreenKeys] 120vdc at 4-5 amps?

Tue May 1 21:19:19 EDT 2018

Couple ideas:
1.  Start out with the isolation transformer idea, find out what the final DC output is when rectified & filtered, cut into the transformer & take off some turns.  
2.  Make the above power supply but feed it with a variac instead of cutting up the isolation transformer.

 Wayne
WB4OGM

-----Original Message-----
From: ken Schwieker <ksweek at mindspring.com>
To: GreenKeys <GreenKeys at mailman.qth.net>
Sent: Tue, May 1, 2018 6:25 pm
Subject: Re: [GreenKeys] 120vdc at 4-5 amps?

If you use an isolation transformer you will end up with considerablymore than 120 volts dc after rectifying and filtering. One possiblesolution is to get a variac, remove all the center hardware
and wind enough turns of insulated wire for the secondary to produce theneeded voltage.
Ken S 

At 11:13 AM 5/1/2018, you wrote:

No, I don't need to run 100loops at once. I have several pieces of gear with 120vdc motors and itwould be nice not to have to plug/unplug them one at a time on my 1Asupply.
Any suggestions about where to find a suitable transformer? -Â Diodes and caps are no problem. I'll keep an eye out at the Daytonhamfest.

Nick England K4NYW
www.navy-radio.com

Virus-free. www.avg.com		

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