Ladies and Gents....
I repaired an RS-20A recently. The balancing resistors from the pass transistors had burned up because someone put a 15 amp fuse on the primary side with a load more that 16 to 20 amp on the 13.8 volt side. Not ever done this before, I made sure the 723 was set at 13.8 volts and then used a 12 volt light as a load. She regulated quite well. But now, the regulation voltage has increase to 15.5 volts. This happened over a 24 hour period. This does not seem right to me...and I wonder what some of you thing about this. Lee - K0WA In our day and age it seems that Common Sense is in short supply. If you don't have any Common Sense - get some Common Sense and use it. If you can't find any Common Sense, ask for help from somebody who has some Common Sense. Is Common Sense divine? _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
Lee
Was the rise to 15.5 with or without a load? How much load were you using? 73 John WA8KNE ETC USN retired On 8/26/07, Lee Buller <[hidden email]> wrote: > Ladies and Gents.... > > I repaired an RS-20A recently. The balancing resistors from the pass transistors had burned up because someone put a 15 amp fuse on the primary side with a load more that 16 to 20 amp on the 13.8 volt side. > > Not ever done this before, I made sure the 723 was set at 13.8 volts and then used a 12 volt light as a load. She regulated quite well. > > But now, the regulation voltage has increase to 15.5 volts. This happened over a 24 hour period. This does not seem right to me...and I wonder what some of you thing about this. > > > Lee - K0WA > > > > In our day and age it seems that Common Sense is in short supply. If you don't have any Common Sense - get some Common Sense and use it. If you can't find any Common Sense, ask for help from somebody who has some Common Sense. Is Common Sense divine? > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
Free forum by Nabble | Edit this page |