[Elecraft] K3 cleanest signal possible

[Fred Townsend]

Wayne all I can say is wow! I knew the K3 was good but I had no idea it was
that much better. Let's hope the other manufactures adopt the most sincere
form of flattery... they copy the K3. After all that benefits all listeners.


My question relates to Matt's use of a battery booster. In theory this
allows the K3 to use maximum feedback and therefore have an even cleaner
signal. However my experience with battery boosters, not necessarily the one
Matt uses, is they are dirty in terms of electrical noise. The lower the
input voltage the dirtier they get. What is the K3s sensitivity to power
input noise. In short is the battery booster concept a net gain in terms of
spectral purity?

73
Fred, AE6QL

-----Original Message-----
From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Wayne
Burdick
Sent: Monday, January 19, 2015 9:22 AM
To: Kjeld Holm
Cc: elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3 cleanest signal possible

Hi Kel,

The K3/100's phase noise and ALC artifacts are so low at all power levels
that you shouldn't need to finesse this. I would select power level based on
what you want to get out of the amp.

See W9YC's study of transmit phase noise and keying bandwidth of various
transceivers:

    http://audiosystemsgroup.com/TXNoise.pdf

73,
Wayne
N6KR