It is my belief that a lot a technical aspects of Elecraft products are being discussed 'Off Reflector' between specific interested individuals. I think that, because these discussions are not seen by the group, a lot of useful information is being missed.
I would like to see these in-depth technical discussion treated in the same manner as the "what soldering iron should I use ?" type threads. Maybe the reflector could be sub-divided ? END OF RANT ... 73 G3RXQ On Fri, 18 Mar 2005 01:26:19 +0000, Fraser Robertson wrote: > Thank you for the responses and I'm pleased to get some discussion going on > > this subject on the reflector. Phase noise has been brought up before, but > not discussed in detail. As I said I've had personal emails about this so I > know I'm not on my own here. > > I should point out that my comments were not intended to 'slag off' the K2, > and I am not 'obsessed by numbers'. I don't expect the K2 to have lab grade > performance, nor to outperform high price rigs. My sole reason for looking > into this (believe me I've got better things to do) is due to complaints > about my signal on air. These have been from respected and technically > competent amateurs. I can go into detail if required. > > Several months ago I had some exchanges with Gary and Eric, and sent them > some analyser plots. More recently I've done comparisons at 300Hz from > carrier using a HP8640B as a reference, and I soon should be in a position > to produce more detailed plots of the close in phase noise. > > Although the comparisons I've made clearly show the K2 is inferior to the > MP, 870 and a home brew rig in this respect as stated, the phase noise > performance to me seems adequate, however, that doesn't explain the comments > I've received on air. I get very similar results with two K2's, one built > by me and another by GU3MBS, who is a very experienced K2 builder. Both > have all the latest mods. At other times I've received good reports, > possibly from less critical operators? I want to get to the bottom of this > so that I can confidently use my K2 for QRO contesting. The rig has many > fine attributes and I take my hat off to Wayne and Eric for their excellent > design and production engineering. > > By the way I've moved the K2 as far as practical from hum sources (>2') and > even tried enclosing it in a mu-metal shield, so I'm pretty confident that > magnetic modulation isn't the culprit. > > 73 Fraser G4BJM > > _________________________________________________________________ > It's fast, it's easy and it's free. Get MSN Messenger today! > http://www.msn.co.uk/messenger > > _______________________________________________ > 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
