My BC-610 plate transformer (open frame) is available free to pick up from Roundrock, Texas...
I once rebuilt a Globe King 500 RF plate transformer, and made the secondary winding w/o a ct, to save wire, and use a bridge rectifier. I did a really good job with it, and vacuum impregnated it, baked it, and all that. Problem was however that when I went to reinstall the E & I laminations, I only got about 95% of them dudes back on before I ran out of room. The core had shrunk on the mandrel when I rewound it. The consequence? The primary when excited with 120 vac was saturating (pulled 10 amps unloaded), and was only OK at 105 vac and below. Turned into a door stop, and then landfill. sigh. So Gary, if you rewind your 610 plate transformer, I have a suggestion. Whatever the turns ratio is, maintain that, BUT increase the number of primary turns at least 5% to avoid the problem that I had with core saturation at normal 2005 line voltage. Jim -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of GBrown Sent: Monday, September 19, 2005 5:07 PM To: Discussion of AM Radio Subject: Re: [AMRadio] Drying out HV transformers / Chokes Read it closely, "MY PLANS ARE TO REWIND IT". Thats about as plane as it gets. Regards, Gary...WZ1M ----- Original Message ----- From: "Geoff" <[EMAIL PROTECTED]> To: "Discussion of AM Radio" <[email protected]> Sent: Monday, September 19, 2005 5:50 PM Subject: Re: [AMRadio] Drying out HV transformers / Chokes > GBrown wrote: > > >Speaking of HV trannys for the BC-610. I have one with a shorted secondary. > >My plans are to rewind this hunk of iron and turn the primary into a dual > >voltage, 115/230. This tranny is from the "E" model. Would I have anyone out > >there that mite be interested? Also, the transformer has those big beautiful > >cast endbells. > > > > interested... in....? > > rewinding it? > Buying it? > rewinding and retapping it for dual primaries? > > ya gotta talk a bit clearer than that, to communicate ;-) > > -- > 73 = Best Regards, > -Geoff/W5OMR > > > > > ______________________________________________________________ > AMRadio mailing list > Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:[email protected] > AMfone Website: http://www.amfone.net > AM List Admin: Brian Sherrod/w5ami > > ______________________________________________________________ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:[email protected] AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.344 / Virus Database: 267.11.1/104 - Release Date: 9/16/2005 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.344 / Virus Database: 267.11.1/104 - Release Date: 9/16/2005
