Gerhardt,
Yes, I too would believe D36 is broken - it is quite fragile and will crack
if the leads are bent too close to the glass body - HANDLE WITH CARE.
You can temporarily substitute a 1N4007 diode until you can obtain a
replacement (the 1N4007 was used in the D36 location until the keying
waveshape change was implemented). You can likely find a 1N4007 easier than
the proper PIN diode.
With the 1N4007 in D36, your keying waveshape may not be exactly correct (it
will be close enough), and it should get you through the testing of your K2.
73,
Don W3FPR
Life is what happens when you are making other plans
- Original Message -
At TP2 on transmit I get a nice signal on my oscilloscope, abt 0.005 Vrms
But behind TP2 the signal vanishes. All measurements are way too low, if
present at all. At U10 Pin 4 there's only a short Jump to 5V and immediately
back to 0 on keying. No HF detectable.
I unsoldered the Diode D36 and checked for resistance. Infinite in both
directions. Does this mean what I think? This D is broken?
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
http://mailman.qth.net/mailman/listinfo/elecraft
You must subscribe to post.
Subscriber Info (Addr. Change, Unsub etc):
http://mailman.qth.net/subscribers.htm
Elecraft page: http://www.elecraft.com
