Re: [Elecraft] [KAT1] 1N34 Diode replacement
I don't know if we're talking about the same diode. The broken diode is not in the bridge used to measure fwd/rfl power. I'm talking about D3, connecting the output of the buffer op-amp U2A to the RFDET/DATA pin on P2. I don't know what it's for (what is RFDET/DATA ? I don't have the K1 schematics right here). I suppose I'll use a low-drop schottky, like 1N5711, thanks to everyone for the advice 73, matthias HB9EGM Tom Hammond wrote: Matthias: The 1N34 diode on my KAT has its glass broken. With what kind of diode can I replace it? What kind of characteristics does it need? In most instances a 1N5711 will be an acceptable replacement. But REPLACE BOTH diodes, not just the broken one. Important to have similar diodes on each side of the bridge. 73, Tom Hammond N0SS ___ 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
Re: [Elecraft] [KAT1] 1N34 Diode replacement
kratchkov wrote: The 1N34 diode on my KAT has its glass broken. With what kind of diode can I replace it? What kind of characteristics does it need? The best replacement is probably one ordered from Elecraft. They should only charge letter post shipping for something like that. However, it is a germanium point contact diode. (Schottky signal diodes are almost as good, and I believe that is what is actually used in some of the more recent Elecraft designs.) -- David Woolley The Elecraft list is a forum for the discussion of topics related to Elecraft products and more general topics related ham radio List Guidelines http://www.elecraft.com/elecraft_list_guidelines.htm ___ 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
Re: [Elecraft] [KAT1] 1N34 Diode replacement
Great! I just found a OA95, so I replaced the diode. Thanks for all the advice, wish you nice QSOs, 73 Matthias HB9EGM Tim Heasman wrote: Hi Matthias, My little books has the following: aa118 aa134 aa144, oa85 oa91 oa95, or in618. It is 75V 5mA and germanium I think. 73 tim gm4lmh - Original Message - From: kratchkov [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Tuesday, October 21, 2008 5:49 PM Subject: [Elecraft] [KAT1] 1N34 Diode replacement Hello group, The 1N34 diode on my KAT has its glass broken. With what kind of diode can I replace it? What kind of characteristics does it need? 73 Matthias hb9egm ___ 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
