[ARC5] 28 volt transformer question ?

[Hubert Miller]

Wow. That deserved a medal for ingenuity.
-Hue

>Subject: Re: [ARC5] 28 volt transformer question ?

I needed a hefty 12 volt supply to power the Wireless 19 set acquired from my uncle. I had a miniscule budget based on mowing lawns. I removed a power transformer from a TV set. Fortunately the secondaries were the outside winding so I carefully cut them out with a hack saw and wound a new secondary with 12 gauge magnet wire and fed a bridge rectifier built with 4 heavy duty Poly Paks diodes. I hooked up a huge capacitor bank. It barely started the dynamotor and regulation was poor so I used the supply to charge a car battery through a series diode to run the dynamotor. 

The toughest part was winding the magnet wire around the core. I calculated the number of turns needed and added extra and scraped the insulation off to add taps for fine voltage adjustment. 

Mike N2NS