Hello K2ers! I just written an email to Henning regarding his results and told him, that should be a great gesture if he can add a note to his site where is clearly written, that something was wrong with measured K2 or XV144. I hope he will do it.
73's Adi ----- Original Message ----- From: "Dick Harms PA2DW" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]>; "'S55M'" <[EMAIL PROTECTED]>; "'Ken G3WCS'" <[EMAIL PROTECTED]>; <Elecraft@mailman.qth.net> Sent: Sunday, April 10, 2005 6:15 PM Subject: RE: [Elecraft] Elecraft XV144 and XV50 - TX Noise and birdie > Hi all, > > If the K2 has positive IIP3 specifications on 28 MHz which I think it has > (though the measurements I have seen were all conducted on 14 MHz...), then > it is hard to believe the measurements of DF9IC are reflecting the true > situation. > The XV144 uses a TUF-1H which is a 17 dBm mixer, the frontend is made up of > devices with positive IIP3 specs, so -26,4 dBm is really impossible! > I suppose something went wrong in these measurements and that can happen, we > are humans after all. But I hope DF9IC will redo that test! > > The only thing that I am convinced of, is that the phase-noise of the K2 can > be improved and that it will bring significant improvement. I totally agree > with Robert S53WW on that one. Of course, -124 dBc at 10 kHz is not bad but > it must be possible to improve it to the level of the Ten Tec OMNI VI+ (-138 > dBc/Hz at 10 kHZ).... > Another point of improvement may be the bandfilters in the 28 MHz section. > They are the same types that are used on the lower bands and their in-band > and out-band selectivity on 28 is a point of concern. > > Best 73, Dick PA2DW > > K2 #3892 plus DEM 28-144 ECK transvertor to 2m (never measured yet hi!) > _______________________________________________ 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
