VLF: Re: DK7FC's 7th VLF kite experiment

["Markus Vester" <markusvester@aol.com>]

16:45: Unfortunately the attempts to restart the generator have failed, so no possibility to transmit on 6470 Hz. Now Stefan is finally packing up and calling it a day. He is really looking forward to come home and go through the reception reports!

 

Many thanks to all involved, and also my congratulations to Jacec for his excellent reception at 902 km.

 

Greetings from Nuernberg,

MArkus, DF6NM

 

 

PS: sri typo in my last message - the long chirping dash started around 12:25, not 11:25. 

----- Original Message -----

From: Markus Vester

To: rsgb_lf_group@blacksheep.org

Sent: Saturday, October 02, 2010 3:44 PM

Subject: VLF: Re: DK7FC's 7th VLF kite experiment

Update at 13:30: Generator still down, but Stefan is physically working hard trying to get the motor running again. The long dash 11:25 to 12:54 was sent using the small 12 V PA and car engine running. The noticable chirp (~ 18 mHz down) was attributed to sagging supply voltage for the DDS crystal.

 

Best 73,

MArkus

 

----- Original Message -----

From: Markus Vester

To: rsgb_lf_group@blacksheep.org

Sent: Saturday, October 02, 2010 2:26 PM

Subject: VLF: Re: DK7FC's 7th VLF kite experiment

Latest update at 12:25: Kite still up. But at 11:38 the generator ran out of fuel, and Stefan's still struggling to start her up again. 73, Markus

----- Original Message -----

From: Markus Vester

To: rsgb_lf_group@blacksheep.org

Sent: Saturday, October 02, 2010 1:48 PM

Subject: LF: Re: Re: DK7FC's 7th VLF kite experiment

Stefan has fixed the PA problem and is getting > 1A antenna current. Today this requires only about 400 W input, due to favourable wet ground conditions.

 

The DFCW keying is somehow not working, so Stefan has basically transmitted a long carrier since 10:50. He has manually shifted the frequency down by 0.05 Hz at 11:20, and back up at 11:30.

 

Best wishes,

Markus

----- Original Message -----

From: Markus Vester

To: rsgb_lf_group@blacksheep.org

Sent: Saturday, October 02, 2010 12:37 PM

Subject: VLF: Re: DK7FC's 7th VLF kite experiment

yes. The rain has ceased, and the kite is going up well. Stefan had a problem in his "big" PA, so since 10:15 he is using about 300 W from the smaller one. Antenna current about 0.6 A. Frequency measured here is 2.3 mHz below 8970 Hz.

 

Regards,

MArkus (DF6NM)