Same here, I have a 6/6 Yagi stack on 10 and get more or less the same reaction.
A built in preamp for 6 and 10m would have been super. As soon as I get some time I will make one. /SM2EKM -------------------------- On 2012-10-26 18:02, Dave Hachadorian wrote: > I have 6 elements on 10, and the K3 s-meter rests at S-0. When I > turn the K3's preamp off, I can barely hear a change in antenna > noise. > > Do you have a good choke at the Hex Beam feed point? If not, > maybe noise on the outside of your coax is going onto the > antenna. > > > Dave Hachadorian, K6LL > Yuma, Arizona > > > > > > -----Original Message----- > From: Dale Boresz > Sent: Friday, October 26, 2012 3:00 AM > To: [email protected] > Subject: Re: [Elecraft] K3-PR10 > > Fred, > > You must have an enviably quiet QTH (or a very poor antenna) if > you find > that the K3 can benefit from a preamp on 10m. I work a lot of > weak > signal CW on 10m with a simple Hex Beam up about 45 feet. Even > with the > Hex Beam's low gain, I can see the noise floor drop by about 9 > dBm when > I disconnect the antenna from the K3 with the antenna pointed to > the > quietest part of the sky in the early morning hours when the band > is > clearly not open. These measurements were taken using both the P3 > and > the K3's built-in AFV amd dBV measurement functionality. > > Based upon the above measurements, the band noise is already one > and a > half S-Units above the receiver's noise floor, so it seems to me > that in > terms of improving the signal to noise ratio, a preamp would be > of > little value. > > What am I missing here? (perhaps a quieter location ;-) ) > > 73, Dale > WA8SRA > > > > On 10/26/2012 4:51 AM, Fred Smith wrote: >> Tim >> >> I can address this a little comparing my FTDX-5000MP and my >> K3's the k3's >> receivers are not up to the level of the Yaesu 5000 on the high >> bands. But >> quite the other way around on the low bands in IMHO but 6/10m >> really needs a >> good preamp for sure. >> >> 73, >> Fred/N0AZZ > > ______________________________________________________________ > 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 > ______________________________________________________________ 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
