Posted by
Ron D'Eau Claire-2 on
Jun 18, 2004; 1:41am
URL: http://elecraft.85.s1.nabble.com/K1-on-USB-CW-tp367868p367883.html
True, Leigh... But you'll still have an upper or lower sideband after adding
or subtracting the L.O.. I got tripped up in that one myself until someone
pointed it out to me.
I haven't taken the time to dig around in the old QST archives, but in the
early days of SSB (around 1950) there was *no* 40 meter phone band. Forty
was 300 kc/s of CW and no broadcasters (Heaven with a key!!).
I'm sort of curious to see if someone built an SSB exciter that tuned 5.0 to
5.3 MHz and mixed it with a 9 MHz oscillator to put a signal into either the
70 or 20 meter "phone" bands. Now that would produce USB on one band and LSB
on the other that might have started the "convention".
If not, it'd be interesting if someone could figure out just when the
convention of using USB above 40 meters started.
Ron AC7AC
-----Original Message-----
Leigh wrote:
As I read it, the USB signal was generated at 455Kc and then mixed up to
9Mc, thus giving a USB 9Mc signal. The VFO was then in thr 4.0-5.3Mc
range. And that was added or subtracted...
_______________________________________________
Elecraft mailing list
Post to:
[hidden email]
http://mailman.qth.net/mailman/listinfo/elecraftYou must subscribe to post.
Subscriber Info (Addr. Change, Unsub etc):
http://mailman.qth.net/subscribers.htmElecraft page:
http://www.elecraft.com