[Lowfer] 13 MHz HiFERs?

[n8tl]

On 13-01-10 12:41 AM, JD wrote:
>>>> I know that HiFers are limited in ERP by Part 15...but, are we also
>>>> limited as to TX Mode??? Is QRSS the only game in town???
> Nope, and nope.  The field strength is one limit (peak, not average carrier
> level), and confining emissions to the band is another; but so far as mode,
> anything that meets those two requirements is fine from a regulatory
> standpoint.
>
> As a practical matter, QRSS3 is an especially good fit between the
> simultaneous needs for a slow mode to enable weak signal decoding, yet one
> which is fast enough to fit most or all of an identifier between fades when
> the ionosphere is less than stable.
>
> The nature of QSB at 22 meters is such that, statistically, you may have a
> few seconds out of every 3-10 minutes where conventional CW will be loud
> enough to copy by ear...but you may have to sit and listen for a long time
> before it does, and depending on the path, it may last for just the duration
> of a few letters.
>
> As you lengthen the dot length beyond 3 seconds, on the other hand,
> individual elements of each character can get broken up by fading.  Some
> guys have tried QRSS6 and longer, but I've always had a hard time
> deciphering the results because of the gaps.  I found myself asking, "Was
> that a dash, or a couple of dots?"  The same problem applies to DFCW of FSK
> CW as well.
>
> There is one much slower mode that _does_ work at 22 meters, though.  Garry
> Hess' modified slash code is compatible with QRSS3, but can be integrated
> over longer time frames very effectively.  In that mode, it's not the
> duration which determines whether an element is a dot or a dash, but the
> slope of the ramp.  The eye is very efficient at sorting out the slope of
> ramp waveforms, even if part of the ramp is missing.
>
> There's a post of mine on the Message Board a couple of weeks back that
> illustrates that mode, although admittedly it was on a day when Garry's
> signals were the strongest on the band.  I have made captures on other days
> when they were the weakest signals, however, and the extra-slow ramps
> remained a lot clearer than the QRSS3 when both were at the edge of
> visibility.
>
> John
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John:

Thanks for the update.....when I made the post, I was thinking 
specifically of WSPR.  I thought that maybe this mode might have a chance.

I just moved into a condo, and, CFR's apply here.  I am putting a covert 
delta loop into the attic  at 22 feet for 22-10 meters. I thought maybe 
I would
try WSPR as well as QRSS3.  When spring arrives, I'll put a stealth 
vertical outside.

Take care my friend, 73's

Tom N8TL