Posted by
Ron D'Eau Claire-2 on
Jun 18, 2004; 4:43am
URL: http://elecraft.85.s1.nabble.com/K1-on-USB-CW-tp367868p367891.html
About the 60 meter 'band', remember that it is NOT an "Amateur Band". We
have *no* channelized Amateur Bands (at least in the USA). The ARRL was
unable to shoehorn in an Amateur Band at 60 meters in spite of a pretty good
case for having one there in order to ensure more reliable emergency net
communications - especially in hurricane country. Since they couldn't get an
Amateur Band assigned to us, they secured us permission to *share* a series
of channels assigned to commercial services on a secondary, non-interference
basis. As you pointed out, commercial SSB is invariably USB. That makes
sense in a channelized environment because you can put the channels closer
together and there's no need to switch the BFO to swap sidebands.
That sounds right about the SSB Jr. I barely remember it and never had one.
I do recall some schemes that created SSB at 455 kHz (455 kc/s back then)
and that led to a problem with image suppression if it was heterodyned
directly to frequencies as high as 14 MHz. It was easy to transmit a
substantial amount of signal at the "image" frequency only 900 kc/s away
from the carrier. So a lot of rigs were built for the lower frequencies and
used a transmit mixer for the higher bands.
Ron AC7AC
-----Original Message-----
From:
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[mailto:
[hidden email]] On Behalf Of Sandy W5TVW
Sent: Thursday, June 17, 2004 6:55 PM
To:
[hidden email];
[hidden email]
Cc:
[hidden email]
Subject: Re: [Elecraft] Re: K1 on USB CW
It goes back to the original "SSB Jr." which was ultimately the basis for
the FIRST real commercially built SSB transmitter, the Central Electronics
10A...Didn't they state that on the 60 meter channels? (USB only?) ...I
supposed ARRL has too many irons in the fire now with the "rehashing" of the
amateur classes/privileges and BPL to worry about 60 meter mode expansion?
73,
Sandy W5TVW
----- Original Message -----
F
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