[Fwd: LF:Antennas

Andre Kesteloot akestelo@bellatlantic.net
Sat, 11 Apr 1998 18:21:03 -0400

Peter Bobek wrote:

> Hi all,
> I just spoke to Jules/LX1PD on the phone and he says "the callsign is
> genuine on 136 kHz".
> Power level in LX is  - according to his information - 1 watt ERP.
> Jules has been running a beacon several times - and he is loud with me:
> 589-599. Unfortunately
> he can not make skeds at the moment since he does not have a key but he
> will have one shortly (!).
> YES, he can copy CW!
> He is running 20 watts into a base-loaded inverted-L, 20m going straight up
> then 40m horizontal wire.
> No radials, however, but he is using the ground system of his shortwave
> tower. His loading coil
> (4.3 mH) is causing some problems (arcing). Bandwidth of his antenna is
> less than 600 Hz for a
> 2:1 SWR.  Heard him this afternoon on 136.3 kHz.
> Jules is very busy/QRL and does not have much time at the moment for
> LF-work.
> As soon as I have more infos IŽll post them.
> Just finished modifying the antenna of DA0LF (adding some capacitance at
> the top). The required
> base loading coil value dropped from abt. 4 mH to 2.5 mH but efficiency is
> still pretty poor  (< 0.1%)....
> The antenna looks more like a T now: 15m straight up, then 33m going N and
> about 29m going S.
> Next tests (DA0LF) are scheduled for either April 26th or May 3rd. Info
> will follow.
> Happy Easter to all.
> Peter/DJ8WL, (DA0LF on 137.1 kHz).