Contact DK7FC-P F4DTL

Présentez-vous - Vos habitudes - Vos antennes - Vos TRX -Vos possibilités de Sked...
F4DTL
Animateur
Messages : 1553
Inscription : 10 mars 2008, 23:07
Localisation : Ris Orangis JN18FP

Contact DK7FC-P F4DTL

Message par F4DTL » 09 janvier 2011, 01:20

Image

Daer LF group,

Due to the WX forecast i decided to start my activity tomorrow. It will be just on LF, no VLF activity this time. Perhaps the wind is too strong so i can only use the 100m kite with its 500 kp strong braid. The 300m kite has a 280 kp braid which might be to weak but maybe i'm crazy enough to use it anyway. The 300m kite is allowed to be used only in daylight. So, in the night i have to go down to 100m anyway.

Apart from doing QSOs (hopefully) my goals are reaching the 4X1RF grabber in DFCW-3 and the JA7NI grabber in DFCW-60 or 90. Furthermore i remember an almost-QSO with Ed / RU6LA. Would be nice if this could be completed. I'll start in the afternoon, maybe 11 UTC, without to much stress. But i plan to stay long, so hopefully a contact to USA and maybe even Argentinia could be possible? Maybe even a trace at VE7TIL? LF-Dreaming!!!
BTW i am interested in local QSOs as well, not only DX is of interest!!

Since my LF converter isn't finished i have to use the DDS VFO for LF which is slightly drifting in a QRSS-60 window but i'll be in contact with DF6NM who can tell me the drift and offset

If all works well, my CW QRG will be 136.8 kHz, DFCW-3 137.7 kHz and DFCW-60/90 136.177 kHz(+- 3 Hz). My receivers are the 706, the K2 (with a GW4ALG 30m-converter) and the new /p RX that is under test... During transmitting DFCW-3 i will receive in DFCW-3 and 10.

My /p RX is still not optimised but at least i got a QSO with RA3YO in DFCW3/8 last year and a CW contact to M0BMU and G3KEV. I'll have my CW key there and hope for some nice contacts!

F4DTL
Animateur
Messages : 1553
Inscription : 10 mars 2008, 23:07
Localisation : Ris Orangis JN18FP

Re: Contact DK7FC-P F4DTL

Message par F4DTL » 09 janvier 2011, 16:33

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

F4DTL
Animateur
Messages : 1553
Inscription : 10 mars 2008, 23:07
Localisation : Ris Orangis JN18FP

Re: Contact DK7FC-P F4DTL

Message par F4DTL » 09 janvier 2011, 23:03

Image

Répondre

Revenir à « Qui est QRV sur 2200 mètres »