Hi Jim,
Unless I missed something, neither my email nor Thom Lacosta's made any claim
about how the sideband selection was made and whether the sum or difference of
which way it was hetrodyned would cause a sideband flip. The 10B and 20A had
toggle switches for sideband selection. For operation on 75 and 20 meters you
added or substracted 5-5.5 MHz and THEN flipped the sideband switch to the
correct setting. When moving from 75 to 20 meters you had to flip the sideband
switch and if you forgot you would be on the wrong sideband.
This thread has already been beat to death. My comments were more in the line
of "QRP operation" is not new and that the Central Electronics rigs also worked
very well on CW and had a pretty note. If you recall chirps and key clicks
were often present in those days (50's & 60"s).
73 Allen
----- Original Message -----
From: [EMAIL PROTECTED]
To: [EMAIL PROTECTED] ; [EMAIL PROTECTED]
Cc: [email protected]
Sent: Saturday, June 19, 2004 9:06 AM
Subject: Re: [Elecraft] K1 on USB CW
In a message dated 6/19/04 7:55:57 AM Eastern Daylight Time, [EMAIL
PROTECTED] writes:
What's really amazing is that there are so many folks who NEVER were around
then, who NEVER operated SSB at the beginning and NEVER had the very common
Central Electronics 10 or 20 rigs that can tell all of us who were there
that
it's impossible to operate the way that we did.
I don't see anybody claiming that.
I guess I am getting senile....it must have been impossible that many times
I forgot to "flip the sideband switch" when moving off of 75 meters and
being on
the wrong sideband.
It's possible that you forgot to swap sidebands.
I do recall, however, having lots of fun working to have the most carrier
suppression I could get, and the most stabile VFO....and then setting up
round
tables on 75 where some of us were on LSB and the others were on USB on the
same frequency....
No doubt!
What is being claimed is simply this:
If you generate SSB (either sideband) at 9 MHz
and mix it with a 5-5.5 MHz VFO
you will get the same sideband on either the sum (20 meters) or difference
(75 meters) mixing product.
It's not a function of the rig used,
or the time period,
or whether it's phasing or filter.
The math proves it.
73 de Jim, N2EY
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