Yes - that´s it, exactly. And part of KSYN3 stiffener u/g ( http://www.elecraft.com/manual/ELECRAFT%20KSYN3%20Stiffener%20Mod%20Rev%20D.pdf) is only the first - R10 replacement (56k SMD resistor is listed in the set of parts for this u/g). So - for K3 S/N less or around 3922 - maybe the second one ( http://www.elecraft.com/K3/mods/KSYN3%20DDS%20Gain%20Modification.pdf) is better to be done in the same time I think (you need separate 51Ohm resistor ready for it to place accros R20). As I want to order stiffener u/g for my #727 I will be prepared to perform both together.
73! L. -dst- K3/100 #727 2010/6/23 Paul Christensen <w...@arrl.net> > The first KSYN3 stability change affects R10 with its value moving from 82K > to 56K. In the second change, R20 is changed to 25-ohms. In both cases, a > new resistor can be bridged across the older resistor to establish the new > component value. > > Paul, W9AC > > ----- Original Message ----- > From: "Alexandr Kobranov" <kobra...@amoscz.cz> > To: "Bill W4ZV" <btipp...@alum.mit.edu> > Cc: <elecraft@mailman.qth.net> > Sent: Wednesday, June 23, 2010 1:49 PM > Subject: Re: [Elecraft] K3SYN3 with and without stiffener (was: shielding) > > > 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. > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
