I am not sure - aren´t there 2 modifications of KSYN3 module - one for avoiding PLL problems in higher temperature (by changing R from 89k to 50k) and the second one for curinng "chirp" problem by increasing of the gain of some transistor by replacement of some other resistor? I suppose only the first one is a part of KSYN3 stiffener u/g. Or am I wrong? (Just to make clear which one is curing temperature stability, which one "chirp" problem and stiffener for avoiding "microphonic" effects.) 73! L.exa, ok1dst K3/100 #727
P.S.: Hope to see some of you in Friedrichshafen this week! 2010/6/23 Bill W4ZV <[email protected]> > > > Sverre Holm (LA3ZA) wrote: > > > > Thanks for comments - OK it's a stiffener, not a shield. > > > > Looks like I should put the stiffened KSYN3 in the primary position then, > > eliminating the possibility for transmitting a chirpy signal when > > monitoring the transmission on the internal loudspeaker. With time I can > > perhaps upgrade the second synthesizer with a stiffener. > > > > Both the DDS Gain Mod (for chirp) and the Stiffener Mod primarily affect > the > transmitted signal, so both mods should be installed in the Main VCO. For > KRX3 users, Elecraft recommends making mods to both VCO boards in case > those > boards should accidentally be swapped in the future. If you take care to > mark the modified board, IMO it should not be necessary to modify the other > one. > > 73, Bill > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/K3SYN3-with-and-without-shielding-tp5213399p5214089.html > Sent from the [K3] mailing list archive at Nabble.com. > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
