Hi David,
Go to Rob's talk and make a video for the rest of us to enjoy and
learn. Have someone else drive while you sit in the back seat doing
the assembly ; o )
I chose to attend the Boulder Amateur Radio Club (BARC) meeting.
Couldn't get a chauffeur so had to postpone the assembly, probably until
this weekend.
Following the basic club meeting and discussion, Rob's presentation and
the interleaved Q&A took about two hours and was an evening well spent.
BARC is in the process of setting up new clubhouse facilities at the
Boulder County Airport, where this meeting took place. Unfortunately no
taping was done. However, much of the content was merged from the Dayton
presentations that Rob makes available on his web site:
http://www.sherweng.com/
Regarding receiver performance, Rob emphasized the importance of good
narrow-spaced dynamic range, correct AGC behavior in the presence of
impulse noise, and low local oscillator phase noise. Good narrow-spaced
dynamic range is particularly important for CW contesters, less so for
phone operators. The K3 is the first rig he has tested that exceeds 100
dB for close-in (2 kHz) spacing dynamic range.
In addition, Rob spent some time talking about the sad state of transmit
IMD in virtually all modern transmitters, except perhaps those that
provide Class A operation. Splatter on SSB transmissions, especially
with solid state PAs, is usually due to aggressive use of ALC to control
power. And key clicks on CW transmissions usually result from ALC and
rise/fall time issues.
Gus Hansen
KB0YH
K2 S/N 3302
K3 S/N 441
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