That 'thudding' is the transformer going "Ugh" during the first half-cycle
(or full-cycle) of AC which it's trying to charge the completely DIScharged
electrolytic in the supply.
My Astrons all do that was well.
73,
Tom N0SS
At 11:31 AM 12/16/04, you wrote:
I use a Pyramid power supply. PS35G to be exact. Sometimes when I turn
it on it makes a thudding sound. But it works fine and it doesnt do it
all the time. I am not the original owner and Ive had it for a couple
years so I know its getting pretty old by now. Wondering what would make
that noise. Kinda sounds like someone hit a metal box with a mallet best
I can describe it.
WT5Y
_______________________________________________
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
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: Elecraft@mailman.qth.net
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
