Thanks Stefan - it will be a couple of weeks to get to full power as these trees cant stand the weight of the cables.... :-( I need to grow something quick!
Id say, from my limited experiences its actually easier path at 137 - maybe easier isnt the word to be used but my 477/505 openings that have been very long haul were fleeting and often not repeatable whereas, as a known example XDW experimental made it from Oklahoma to ZL for quite a few nights/months in a row on 137 on a lot of land path...and so far Ive not seen a signal from AK to VK or ZL on 477/505 though I dont think they have been whizzing the electrical meter as much. But I need to take more notice of their Thursday evening test signals they shove out.
Looking at the results of a few years of reception it appears that 137 has been "better" but Its very difficult to match as its "apples to pears" in reality with different s/n and antennae patterns etc.
Even though I was a radio op (I wouldnt call myself an officer!) at sea/coast station and used 500 a lot I still feel like a novice :-) this land stuff gets in the way pretty quickly, and we are pretty sure intervening mountain ranges mid path such as those near me and North China/India /Tibet do rough up the wave fronts at times....I know they do at VLF...
Laurence KL1X Wasilla Alaska
"you can see Russia from my back door"
Date: Wed, 12 Sep 2012 01:02:11 +0200
From:
[email protected]To:
[email protected];
[email protected]Subject: Re: LF: WE2XPQ 137.7752, DCF39 appears
Laurence,
Let me forward that to Edgar in Tasmania who may have a look at your
signals. He also catched me out of the noise. Your path would be
http://no.nonsense.ee/qthmap/?qth=BP51IP&from=QE37PD
Not a short distance but almost completely over sea water and the
common dark times are higher than for me.
Do you have an imagination how much easier it is to be copied in AK on
477, compared to 137?
73, Stefan/DK7FC
Am 12.09.2012 00:53, schrieb Laurence KL7UK:
Markus - good news is that Im just about finished
testing the HP3336B sig gen locked to the 10MHZ GPS ref, which will
directly drive the Decca at 137.XXX signal freq. The PSU and hopefully
the tuner are continuously rated but Ill probably choke it back to
400-500W RF to save the complaining squirrels.
Im hoping this will be good enough for a long term overnight "go" when
I finish the loop antennae, though this wont happen now till the first
week in Oct. There is no path to Europe as such at the moment - well
its really dodgy but the path to VK and ZL would be pretty good at the
moment given past signal receptions from ZL6QH et al.
Given past openings to Europe during the deepest part of Winter (Dec
and Jan) Pre dawn Eu say 0400Z was the best with Peter
LDO/DF6NM/G3AQC/DK7FC but Stefan managed to get to Alaska at around
1600Z too. I cant recall receiving any ham signals on 137/500 before
December - but SM6BHZ may have made it over the pole earlier on 500 on
WSPR in Nov. Im getting built around so the s/n is getting marginally
worse - but thankfully to the North is just a lake.
Laurence KL1 X WE2XPQ
From:
[email protected]
To:
[email protected]
CC:
[email protected]
Date: Sun, 2 Sep 2012 18:15:18 +0200
Subject: Re: LF: WE2XPQ 137.7752, DCF39 appears
Laurence,
I'd be interested to see whether XPQ could be
detected in a microHz spectrogram here, either on Chris' grabber
in Bucharest
or mine in Nuernberg. Can you give your exact
frequency, and could you transmit a stable uninterrupted carrier for a
couple of hours? We've been seeing narrow traces from US East coast
stations before, but I wonder how much effect transpolar Doppler could
have.
Is DCF-39 really as strong as 25 dB in 100
Hz, ie. 45 dB/Hz, or would that be in 0.1 Hz? What are the best hours?
Best 73,
Markus (DF6NM)
Sent: Sunday, September 02, 2012 4:21 AM
Subject: LF: DCF39 appears
Nice to see DCF39 appearing on QRSS this evening over
the Pole. Ive not seen it since Spring here in Alaska. About 25dB noise
in 100Hz (ish units). Not dark yet either,
Laurence KL1X WE2XPQ Wasilla AK
Sent: Sunday, September 02, 2012 2:17 AM
Subject: LF: XPQ
Further testing on 137.7752 ish carrier only ongoing -
still in shakedown mode but sweeps of individual 400w Modules show the
same resonance and output parameters from 2005 :-)
http://kl7uk.com/XPQ2.jpg
Set up in garage.
Laurence We2xpq KL1X Wasilla Alaska
Sent: Thursday, August 30, 2012 6:34 PM
Subject: LF: WE2XPQ 137.7752
A little bit of Nostalgia - WE2XPQ Wasilla Alaska is very
intermittently testing on 137.7752 DFCW various speeds and the odd bit
of QRSS - Power will be up to 2W ERP but is to be confirmed.
Periods of operations, modes and powers will vary as Im trying to
remember all the ins and outs of why I installed 'X" relay to do a "Y"
function as its been 7 years or so.
Transmitter for the moment is the Decca 5501, drivers are FT817 h/b
transverter, Loop with around 100m circumference at 50ft or so and
phase meter. The Birch trees bend a lot more than the OKie
Cottonwoods so not sure how much detuning will happen as thing become
more slack or as the trees become snow laden -
Laurence We2xpq KL1X Wasilla Palmer Alaska BP51IP
