Re: K3s noise figure spec

Posted by ab2tc on Jul 01, 2020; 3:48pm
URL: http://elecraft.85.s1.nabble.com/K3s-noise-figure-spec-tp7662748p7662770.html

Hi,

Here is a quote of my response to the exact same question in 2017:

"Hi,

According to the ARRL review in November, 2dB! Deaf no more.

AB2TC - Knut"

That was from this thread:

https://marc.info/?l=elecraft&m=149365913804929&w=2

There was a fairly long follow up discussion that was quite informative
(e.g. the chip used is capable of much better performance in a
manufacturer's test circuit, but in a practical amplifier will do slightly
worse).

AB2TC - Knut




stengrevics wrote
> Does anyone know what the preamp 2 noise figure is on 6 meters?  I have
> not been able to find it in the owner's manual or in Fred's book.
>
> Thanks,
>
> John
> WA1EAZ



Dave Sublette-2 wrote

> Does anybody KNOW what the noise figure is for the 50MHz preamp on the
> K3s?  It isn't listed in the specifications.
>
> I need to know in order to make system noise figure calculations.  My
> feedline is going to be long (low loss, but long) and I'm trying to
> determine if I will need a preamp mounted at the antenna.
>
> Thanks,
>
> Dave, K4TO
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:

> Elecraft@.qth

>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to

> lists+1215531472858-365791@.nabble





--
Sent from: http://elecraft.365791.n2.nabble.com/
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]