Sverre, Thank you for the information. While I do not necessarily like the behavior, it is comforting to know that it is simply an attribute of the design and not a problem with my particularly K2.
Thanks, Michael N9BDF -----Original Message----- From: Sverre Holm [mailto:[EMAIL PROTECTED] Sent: Monday, July 12, 2004 7:54 AM To: Linden, Mike (BRC-Hes); elecraft@mailman.qth.net Subject: RE: [Elecraft] K2: VFO clicks/pops in the presence of strong signals > I hear clicks/pops (about > S-5/6) when the VFO transitions the following boundaries: > > 7015.79/80 (click/pop getting very weak here) 7020.79/80 7025.79/80 > 7030.79/80 7035.79/80 Such clicks about every 5 kHz is normal and is part of the construction of the PLL/VFO-system of the K2. Let me see if I can explain it. The reference oscillator of the PLL is based on a 12 and something MHz crystal, with a variable division ratio following it. However, these steps would be way too course, and therefore the crystal is pulled by varicaps over about 5 kHz between every change of division ratio. The pops you hear is when you are the end of the pulling range, and the divisor changes and the varicap voltage goes to the other end of the pulling range. -- 73, Sverre ------------------ Sverre Holm, LA3ZA www.qsl.net/la3za _______________________________________________ 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
