Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

Re: LF: Activity from DLF´s 360m mast

To: [email protected]
Subject: Re: LF: Activity from DLF´s 360m mast
From: "Dick Rollema" <[email protected]>
Date: Thu, 18 Jul 2002 11:17:29 +0200
In-reply-to: <003001c22c3d$9fbd3680$5f74ccd4@DEFAULT>
Reply-to: [email protected]
Sender: <[email protected]>
Dear Walter and the LF-gang,

Assuming the 360m mast has no top load my antenna simulation program gives a feedpoint impedance of
Z = 11.9 - j149 ohm over perfect ground. The reactive part depends on the diameter of the mast of course which I have arbitrarily put  at 3m.
Be sure to measure the current into the mast so the EMRP can be calculated.

I will probably not be at home to work you as we will spent the day with several amateur radio friends at a camping site near Eindhoven. But I will take my W & G SPM-12 with me, together with a frame aerial so I hope I can measure your field strength.

Looking forward to an interesting experiment I wish you and your friends good luck and a good match.

73, Dick, PA0SE


At 22:24 15-7-02 +0200, you wrote:
Hello to all LF`ers,
on Wednesday, 24th of July, the 153KHz transmitter of Deutschlandfunk in Donebach (JN49ON, 50Km SSE of Frankfurt) will be off air due to scheduled maintenance. By the friendly cooperation of the site personnel and with consent of the regulation authorities, a small group of German LF amateurs has been granted access to one of the 360m masts between 7:00 and 15:00UTC. With a little luck we might be able to achieve about 30dB more radiation efficiency than at home.
     We will probably need some time to work out the impedance matching. After that, we intend to operate preferably in CW and Slow-CW modes. As we expect a rather high noisefloor from the Frankfurt area, we will bring along a tuned loop for receiving, and we will be QRV on 7030KHz in CW as well. If nothing else works, please give us a phone call on+49 174 3692499, or send an email note via the reflector or to [email protected] or [email protected].
     Let`s look forward to a successfull day, hopefully without thunderstorms or strong noise.
73
The group: Markus - DF6NM, Walter - DJ2LF, Ralph - DL2NDO, Ralph - DK3GH, Roland - DL3NDR, Franz - DL5NER
 
<Prev in Thread] Current Thread [Next in Thread>