[Elecraft] Sideband reversal

Mon Jan 28 17:09:58 2002

On 1/28/02 11:43 AM, Steve Lawrence at [email protected] wrote:

>Wow!  You've answered one of lifes mysterious questions I've always 
>wondered about:  why LSB below 20, USB above?  Somehow, I'm not surprised 
>at the outcome.  

Yes, it had to do with 9 MHz IFs and the inversion problem. 9 MHz was 
also convienient for a 5 MHz VFO covering both 80m and 20m.

Other services that use SSB almost universially use USB.

>It's sort of like the question:  Why are calculator 
>keypads (specifically the numbers) arranged bottom to top and telephones 
>arranged top to bottom?  (I'm still looking for the answer to this one.... 
>but like the USB/LSB convention its probably some stupid early technical 
>problem that's no longer an issue either.)

Different human factors people....

Bill Coleman, AA4LR, PP-ASEL        Mail: [email protected]
Quote: "Not within a thousand years will man ever fly!"
            -- Wilbur Wright, 1901