Hi I usually just scratch on the metal case of Q22 (the collector) with a screwdriver while holding it touching the metal shaft. This causes a random popping that the noise blanker handles nicely. You can switch the blanker on an off and here a big difference. If you want to build a pulse generator there are several circuits based on a LM555 that are easy to build. I think Radio Shack still sells 555's. Do a Googal search for National Semiconductor and down load the 555 data sheet. There should be several circuits listed
Don Brown ----- Original Message ----- From: "Karsten Eppert(DK4AS)" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Tuesday, February 07, 2006 11:51 AM Subject: [Elecraft] Wanted: circuit diagram > Hi folks, > > can anybody help me with a circuit diagram for a simple pulse-generator > which I can use as test-generator in order to test the function of the > KNB2? I figure 2 transistors will do, but can´t recall the rest. > 73 > Karsten > DK4AS > _______________________________________________ > Elecraft mailing list > Post to: [email protected] > 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: [email protected] 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
