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.jpgSet
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
