I have a modulation XFMR that was under muddy water for 6 months. I thought it had some how floated away in the "Spring, Tx flood of 94", But I just didn't understand how it would be possible. That's another story, where was I, Oh yeh, the XFMR was found and the mud was off of it. It was let to stand in the sun for about 3 months under shed. I then measured 1000 ohms from any winding to another and to ground. I took the end caps off exposing the coil, rust and mud. Washed it out some more and decided to put it on the shelf in a un-air conditioned office that no one used, where the temp would reach 120-140 every day in the summer. I was thinking I would rewind it some day. But alas, 6 months later all the readings were infinite. To be safe it was mounted on a wooden shelf in the XMTR and has been working for the last 7-8 years. Modulator is four 813s with 2500 volts on the plates, 800 on the screens and about -100 on the grids. This modulator will pump out some PTP voltage. I was really surprised at the come back of this XFMR.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Don Lemley Sent: Saturday, September 17, 2005 11:51 PM To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; [email protected] Subject: [AMRadio] Drying out HV transformers / Chokes Hi all, Ok, I know this has been covered here before, but is there a consensus on how to get the moisture out of HV plate transformers and chokes, so they won't arc on me. And before everyone jumps in with the quick "just put it in an oven on xxx degrees for yy hours", I am working with the iron from a Broadcast transmitter, specifically, the Gates BC-1G so these things are 100, 150 lbs each, and my XYL would REALLY not like it if I tried to put them in her fancy oven. They have been sitting in an un-conditioned but dry hanger/garage for several years, so I am certain they have soaked up a good deal of moisture over that time. Thanks for any suggestions, Don - W8HRQ ______________________________________________________________ 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
