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Reasons to be happy - it's sunny & no
monsoon.
Dave,
Very interesting, tks for your precision
observations.
Well spotted - but not c/heating. Yes, there
is quite a temp-swing in shack, also PA heatsink is VFO.
Do you have a high noise-level?
Surprised you didn't spot Mike who is usually
stronger than me.
Pleased to be braking the E-W
iron-curtain.
73, Rog
----- Original Message -----
Sent: Monday, July 23, 2007 9:43 PM
Subject: LF: [ 500]; Two GW's Testing...
Rog,
LF.
I've
got a complete set of Argo grabs of the GW3UEP beacon covering the last 24 hrs.
(34 MBs worth...too big to e-mail!)
1 The
beacon is visible at this QTH for the complete 24h period, using Argo 3 sec/dot
setting
2 Daytime levels seem weak but fairly constant,
presumably ground-wave only propagation. Never strong enough to actually detect
by ear.
3 The transition to night-time
propagation commences as a series of fades with about a 5 - 10 minute
cycle, starting at around 2200 utc
4
Signals then increase up to workable CW levels, maintaining good copy with
slight QSB from 0030 until 0330utc
5
Signals fall to daytime levels fairly abruptly at around 0400 utc, and I think
Rog's central heating kicks in around then, as the frequency goes for a little
walk LF before settling down close to the 501.500 kHz
nominal.
So,
the best time to work to work GW - SE England seems to be between 0030 and 0330
utc, when presumably skywave propagation is the dominant mechanism....no
surprises there, I guess. At this distance, it's probably a single E-region hop.
By contrast, the longer path to GM4SLV is probably 3 hops or
more.
It
will be interesting to see if the daytime signal levels hold up when Middle
England has dried out a bit!
If
Mike GW4HXO is in beacon mode over the next few days, I'll try and look for him.
Nothing seen so far.
73,
Dave G3WCB IO91RM
Dave/Dave/Gary/Mike,
Many thanks for your mails & reports, just
collected - had an early night after hard labour on Sunday.
Mike/HXO, you're still the GLD of Wales - I'm
just warming up the trees here!
FYI, since March have been QRP [6W from mini-Tx,
via external LPF with 1dB insertion-loss, so 4.75W via 100m 1/2" buried coax
to remote ATU].
Last Thursday I routed the PA dc feed from
12V to the 22V pre-regulator supply & mini-tx now running happily with 20W
o/p, after adding 15kuF smoothing.
Then I removed the external -1dB LPF
& still no sign of M/wave harmonics off-site; so +6dB overall
increase. I_ant now ~0.6A.
Tx is still running on ~501.5.
Tks for tests.
73, Rog.
Dave/WCB; FB on ur Mk1 - this one is mimosa
yellow, currently SORN, hope to MOT it soon.
----- Original Message -----
Sent: Sunday, July 22, 2007 10:16 PM
Subject: LF: [ 500]; Two GW's Testing...
Hi
Rog, LF
Screengrab of GW3UEP at 2107 utc. Just strong enough
to be audible in peaks of QSB. Lots of static this evening, but I think you
signal is definitely stronger.
Still looking for GW4HXO...
BTW,
I've got a Mk1, Conifer green with a yellow nose, swing-axles and
all...
73,
Dave G3WCB IO91RM
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