"dxAce" wrote in message
...


john wrote:

"Robert11" wrote in message
...
Hi,

Let's say I pick up a regular HF shortwave station on AM.

Should I also be able to hear this same station on USB ?

If so, what would the freq. "offset" that I should increase the tuned
freq.
to ?

Should I expect the USB freq to be clearer, or... ?

Thanks,
B.



yes you can listen to AM on USB by slope detecting
the frequency would be 1.5khz higher than the AM frequency
the audio might sound clearer as the IF filters on USB would normally
be narrower than when on AM

Should be able to zero beat right to the frequency. I think you are
confusing
the use of 'slope detection' to copy an FM signal with an AM detector.

dxAce
Michigan
USA


True slope detection can be used on FM signals not SSB

It is really Single SideBand - Suppressed Carrier

For SSB the carrier which was suppressed when transmitted has to be
re-inserted (function of a BFO), modern receivers with USB and LSB mode
selection will insert the carrier automatically.

Then with careful tuning in the USB mode on modern receivers -- it should
sound very clear.

Also one can switch to LSB and get the same result

That is the intellegence is contained in BOTH the upper and lower sideband
of an AM signal.

Try this -- go to WWV at 10MHz with receiver set to AM, then switch to USB,
then LSB
With very careful tuning, the USB and LSB and AM signal will sound nearly
the same depending on filtering.

No offset is required if you tuned "dead on" to the AM signal

CL