On Thursday 13 February 2003 15:44, bernd grupe wrote:
Hi all,
for one who is interested in getting more practical information, there is a
URL:
http://www.qsl.net/iz7ath/web/home_eng.htm
where you can find some hints to build this antenna for 160 m. And
furthermore a lot of results in doing qsos with this type of
lowband-antenna. Talino (iz7ath) suggests 6m long cylindres/2m diameter for
137 kHz. If the loss of efficiency will be abt. 10dB compared to a
fullsize-dipol(measured at 1.8MHz!) then it would be a hope for all lowfers
with large aereas and tolerant neighborhood :-)) 73 Bernd, DF8ZR
Bernd and all,
I was interested in EH antenna for 137 kHz some time ago, because i haven't a
tower 30mt high or more.
I think EH fans claims are simply fool.
Here in Italy there is great interest around EH antenna for 40mt, 20mt and
also for 6mt, someone proposed (for joke) also a version for 10 Ghz only 3mm
length and 1mm diameter.
EH antenna radiate some power and it is possible to do QSO(mainly on 40-20
mt), but cable is part of the antenna, so no new phenomenon, only the old
one.
I know Talino's work, but its results seems to confirm the important role of
the cable.
So if you cannot go high, you can hope only to obtain an efficiency around
0.1%.
'73 IK5ZPV (Valerio)
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