Gary thanks - this pulsing is Im pretty sure a data sig - It resides
on 134.1 Khz and has a fade pattern, but so do local sources so Im
still not sure. Ill check during the heat of the day -
Ive lashed up the mini whip and the concierge here at the hotel
managed to find me a short length of 30mm diam white pipe - ok I dont
have the end caps but tape covers the open end and the bottom is open
to the air here. Its being hosted on one of those 20 bucks 8m long
fishing poles.
First impressions are - good, real good. No Imod (but there arent any
big MW stations here) and a lot better than my bottom loaded wire -
getting the cap up high really has improved the s/n - I again
decoupled the incoming thin coax to the frame and that knocked off the
crud. I guess I have the device about ten feet above the roof.
The only difference to the original design is a slightly longer (cap)
aerial, added another few cms there, and the inter-stage coupling
increased to 680pF from 560pF, only because thats what they have and
not to improve the LF side
I can hear JJY on 40, weakly at the moment, and 60Khz, Loran is S9+,
mfsk on 54Khz (s9) background night-time sits at around S5 with
tstorm peaks to 9+10 - this is with the R75 with no pre amps on - a
lot of drive, but not overly so - but it looks good, and Ill drag this
round as my aerial of choice in the future - Ok ill have to add them
end caps to keep the water out, but that can wait for a day.
Build time was 1.5 hours from the first attempt at cutting the single
sided board with a hacksaw!
My thanks to PA0RDT - Ill monitor DCF39 overnight and the EU 136Khz
window but I think we are still a little disturbed (radio wise)
Laurence G4DMA in 9V1
------------------------------------------------------------------------
From: [email protected]
To: [email protected]
Date: Wed, 9 Aug 2006 09:55:20 +0100
Subject: LF: RE: Tstorms in Singapore (no surprise there)
Hi Laurence,
I have looked at my freq lists & there are 2 Datatrak frequencies
shown nearby at 133.20KHz in UK & 133.24KHz in Argentina, having
listened to the UK one it seems to have a sort of pulsing warble.
Pleased you managed to get the mini-whip parts, I think it is so
good I am mainly using it instead og the G3LNP loop beacauce its
not as restricted on frequency coverage & so small.
73
Gary - G4WGT
-----Original Message-----
*From:* [email protected]
[mailto:[email protected]]*On Behalf Of *Laurence
KL1X
*Sent:* 09 August 2006 03:42
*To:* [email protected]; [email protected]
*Subject:* LF: Tstorms in Singapore (no surprise there)
Its Singapore's national day (41 years on 9th Aug) and we have had
natural fireworks here as well as man made, so I took the
lightning aiming point off the top of the hotel roof until the bad
weather passes. The vertical is some 20ft above the highest
lightning rod and I cant afford the law suit. As well as that LF
is poorer than off late and Ive lost some of my longer range ndb
markers -
Scott - I have a birdie on 133.1 Khz or so, warbles away most of
the time but I dont think its that Canadian - suspect some
controller somewhere here.
Managed to get all the bits for the PAORDT Mini-whip
here including the 2N5106's, but again I had to go to all the
components shops at the Mecca for all radio hams the Sim Lim
area .. 4 sing dollars each. J310 50 cents sing (1.5 sing to 1 usd)
73
Laurence OJ11
(we get a day off work)
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