Hi John I've been looking at this circuit for some time. I have a number of J310s, but no U310s. Do you know whether they are the same animal, just in different casings? 73, Bob N6WG
----- Original Message ----- From: "John Klewer" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Wednesday, July 30, 2008 10:56 AM Subject: [Elecraft] Re: K3 6m pre-amp > Note that I installed this preamplifier in the RX IN/OUT path on the K3 > rear panel > > > > > > To enhance the 6 meter performance of my K3 I built the U310 > > preamplifier as described on N6CA's website: > > > > http://www.ham-radio.com/n6ca/50MHz/50appnotes/U310.html > > > > Tuned up on an HP8970A noise figure meter it gives 11.2 dB gain and > > NF=1.3 dB. > > > > The receiver's performance on weak signals was significantly improved. > > I already had the parts but cost should not exceed $30.00 to duplicate > > this preamp....hard to beat. > > > > I have not done measurements on the radio/preamp combination to > > determine any negative effect on the receiver performance but the K3, > > which always performed well in the presence of strong signals, > > continues to do so. > > > > > > John, N6AX > > > > K3 #567 > > > _______________________________________________ > 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
