HI all.
Yes, the PA0OCD
antenna is very short, but really effective on the 2200m band ! I just computed
his antenna using EZNEC + V5.0 and strandar average ground and losses (soil
resistance, Q of the loading coil, etc...). Results :
- Radiation
resistance Rr = 0.013 Ohms ;
- R
ground system = 30 Ohms estimated ;
- Base
loading coil = about 13.5 mH and 40 Ohms ;
- Efficiency
at 137.5 kHz = about -41.0 dB ;
- ERP
using 50 W Tx = 4 mW (6 dBm), base current = 0.85 A, top current = 0.40 A and
base RF voltage = 10.0 kV RMS ;
- Real
total integrated current on vertical antenna part = 3.8 Amperes x
meters.
Congrats Paul !
____________________________
On other hand, just
a question to Graham. I am actually in a portable QTH in far east part of
France. In the OPERA menu Operator configuration I write F6CNI/P.
In the list of
receiving stations, I see F6CNI, not F6CNI/P. So the /P is not displayed ? But
when I have a look at the PSK reporter map I see my good real SWL call with the
/P….
I use the 1.5.7
version and Windows 8.1 The 1.5.8 is not stable and never shows my spots on the
PSK reporter.
Best 73 to all.
Andy.
Sent: Saturday, August 6, 2016 11:22 PM
Subject: LF: 20:50 136 PA0OCD de F6CNI Op32 -34 dB F:11% in
JN37KW
PA0OCD 50w + 6m Vert+Tophat 6x 1.2m
That would be a compact array on Top band !
73-G,
20:50 136 PA0OCD de F6CNI Op32 -34 dB F:11% in
JN37KW
