[/email] (Rick) wrote:

d an antenna radiation
resistance of 0.2 ohms, assuming a lossless matching network and
radiator, I get an efficiency of 12% over PERFECT earth. Taking the
ground reflection losses into account over average ground, it's about
5%. This is assuming PERFECT matching network and a very good (maybe
new hams out there take their 38 bucks and apply it to their inverted L
project for 160m, or a copy of ON4UN's low band DXing book
...
Rick K2XT


I am sorry, that some people oppose so strongly
against what I said about my experience I gained
with the new HB9ABX Roomcap antenna.
They have no idea what they are talking about.
They criticize without having seen what they talk about.
The referenced antenna books describe what they know about antennas.
This is applicable for the traditional antennas, not for the
new concept of the RoomCap.

I know very good the losses that may occur in antenna systems
and especially in ground losses.
That is, why the RoomCap antenna has its own new grounding system
to prevent such losses.

If in the past all new discoveries were treated that way, the world would still be
flat and the earth would be the centre of the universe ...

---

If you are feeding the antenna with 1 KW real power,
and the in total, less than 70 W is converted to heath,
then 930 W is radiated by this antenna.

And the special grounding system is assuring that
the radiated power is not burned by the surrounding ground,
and is radiated efficiently into the space.

The result is, that I am told frequently:
You are the strongest station I hear presently
on this band.
That happend many time last week on 40m,
and was reported by many UK stations.

---

And read the comment I received from my 160m tests
(with a 3 m long radiator):

Hello Felix,
after our fantastic QSO on 160m we (Peter,DL1BLD)
and I (Heino, DJ5ER) we were completely surprised
with what a strong field strength you arrived in Bremen.
We would like to know how such an antenna can
be built (also for the other HF bands).

73 from Bremen .... (QRB = 600 Km)

- and -

Hello Felix.
Congratulations for your antenna work.
You are the first mobile station on 160 meters for me.
Even you are stronger as the Germans on 160 meters.
I give you on 1.862 Mhz S 9+15 db in the peak!!
The background noise level was S 8 during our QSO

Hope to meet you agn for next report and test.

Piet Schipper / PA0QRS (near Rotterdam)

Schipper mobiele Telecom
2931 LH Krimpen a/d Le
--- --- ---

Would you obtain such reports with
a "dummy load" antenna ?

73s
Felix HB9ABX