LF,
Thank you for the enthusing activity yesterday, all the reports here on
the reflector and lots of people in CW and QRSS/DFCW. I haven't
expected so much activity :-)
TNX to PA0A and DF6NM for the CW QSOs. TNX to ES5AM, IK1HSS and F4DTL
for the QRSS-3 contacts!
Some infos about yesterday:
The wind was very strong and so i used just the 100m vertical
(which has a stronger braid) instead of the 300m vertical. Due to some
raindrops on the coil the resonance was pulled down a bit so it wasn't
possible to tune the system for optimal efficiency. Thus, my signal
was at least 13 dB weaker than expected :-( Anyway it was OK as it
seems... The overall losses in the system have been about 35 Ohm.
Unfortunately the LF /p system isn't optimised yet. It's a high effort
to arrange all the cables, plugs, adapters, boxes... There was a
problem with the logic signal for DFCW, so i had to do it in QRSS. But
CW was not affected by that and it was most satifying to do these 2
QSOs out of the car on the hill in the storm and the clear sky :-)
The K2 with its internal GW4ALG LF/30m converter seems to be overloaded
when using the TX antenna, even when using a 43 dB attenuator. Thus i
have missed some CW calls it seems, sorry! I will work on a better RX!
Later i changed to the IC706MK2G (and its 250 Hz CW filter), that
worked best when using the TX antenna (50 Ohm) and a 14 dB attenuator.
When using a lower attenuation, it gets overloaded. But when using 14
dB attenuation, the AF level is very poor and since the TRX is located
under the car seat, listening to the CW signals was difficult. A simple
headphone would have been a good idea but i have forgotton. That's how
it is on /p, a little more difficult than beeing at home... Thanks to
Guido/DF9PW who brought me an important part that i have forgotten at
home!!
My homemade RX is not optimised yet but worked better than the K2 and
worse than the 706, so it was a good test! Later it was easily possible
to work ES5AM and IK1HSS at O copy, see captures. BTW the 706 seems to
have a good frequency stability, suitable for QRSS60/120, even when
opening/closing the car door several times. During the QSOs to IK1HSS
and F4DTL the kite and its braid was wet (so heavy) and the wind
decreased. Thus, there was strong QSB on my and their sigs, but anyway
it worked as it seems :-)
I was QRV until 2 AM local time and in bed at 5 AM local :-)
Well, things should work much better and easier when my transverter is
ready to use. Then i will do more LF kite experiments, maybe next
month. Most fascinating were the CW contacts. I'll concentrate on them,
means on building a better RX ;-) But my next experiment will be on
VLF again, maybe in 2 or 3 weeks :-)
Tnx agn to all participating! We should do such things more often,
isn't it?!
73, Stefan/DK7FC
Am 08.01.2011 17:10, schrieb Fausto Coletti:
I have received Stefan at -82 dBm
DCF39 at -49 dBm
Anyone have notice if Stefan have
used 100 or 300 meter antenna?
Fausto IK4NMF
-----
Original Message -----
Sent:
Saturday, January 08, 2011 4:47 PM
Subject:
RE: LF: DK7FC/P copied on CW
by far the strongest ham signal ever copied here !
Measured with speclab:
DCF39 : -37.5dB
DF7KC/P: -78dB
G3KEV: - 94dB
DL2HRE: -98dB peak, with strong
QSB
noise: -105dB
Now silence for the last 20
minutes
73, Rik ON7YD - OR7T
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