True... that applies to the K3 preamp as well so it can still be a net gain.
And if the feed line is 50' of 1 5/8 Heliax then it hardly matters. Sent from my iPhone > On Jan 25, 2017, at 5:54 PM, Ken Arck <[email protected]> wrote: > > Well, I don't want this to devolve into an OT issue but it is well > established that any feedline loss ahead of the receiver adds to the total > noise figure of the system. (outside influences such as sky temperature, > local noise sources, etc notwithstanding) > > So if you place a preamp with a NF of .5 dB at the "rig end" of a feedline > run that exhibits 3 dB of loss at the frequency involved, you now have an > effective noise figure of 3.5 dB ahead of your receiver. Placing the preamp > at the antenna has an obvious advantage of reducing that NF by 3 dB. > > Period > > Ken > > > At 04:45 PM 1/25/2017, Jim Brown wrote: >> That depends on settings within the email reflector and also on settings >> within your email program. And it also depends on whether you are paying >> attention when you compose your email. When an email reflector defaults to >> "reply to both," I try to remember to delete the email to the sender and >> respond only to the reflector. In my email program (Thunderbird) it's easy >> to see what's going on in the address section of the email. >> >> 73, Jim K9YC >> >>> On Wed,1/25/2017 4:21 PM, Nate Bargmann wrote: >>> I thought of something later. When you reply to the list does your >>> email client also send a private message to the person you're replying >>> to? If so, that would explain why you're getting the message as your >>> client is sending two messages. I presume the response message is to >>> enable a white list from real people to the recipient. >> >> ______________________________________________________________ >> 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 >> Message delivered to [email protected] > > ------------------------------------------------------------------------------ > President and CTO - Arcom Communications > Makers of repeater controllers and accessories. > http://www.arcomcontrollers.com/ > Authorized Dealers for Kenwood and Telewave and > we offer complete repeater packages! > AH6LE/R - IRLP Node 3000 > http://www.irlp.net > "We don't just make 'em. We use 'em!" > > ______________________________________________________________ > 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 > Message delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected]
