----- Original Message -----
Sent: Friday, October 17, 2003 6:36
AM
Subject: LF: Re: 136 acty
Hello Mal,
I´m rather impressed by your success on
receiving. Seems I am far behind you. However, it might depend on the
noiselevel. Here, next to Mainflingen, the noise is -90 dBm with BW=100 Hz
in the noisegaps. Antenna is umbrella 23m high with 325 pF on the top. How
abt the noise on your side?
It seems to me that I had better results
with a marconi only 12m high and only 120pF on top. With this
antenna, for example, I did copy G2LDO audiable. Not so with a loop of 1.8m
diameter, grounded or ungrounded.
vy73 de Peter, dj9dw.
----- Original Message ---
Hi Peter
Some measurements today using a SIEMENS D2155
PEGELMESSER- 20Hz b/width
Antenna 80 metre perimiter loop parallel
resonated for 137 khz
Antenna disconnected -118db
Antenna connected
-105db (no rf amplifier etc, just
matching capacitor to resonate)
Signal
DCF
-33db
This is fairly accurate but there is some
QRN rain static about.
The measurements on G3YXM signal a couple of
days ago was using speclab and was relative because it depends on the
RX AF setting for noise floor, but the relative measurement
of 55db of signal above noise should be authentic.
My resonated vertical has more gain over the
loop, will check sometime and let you know if interested. When I get more
time will measure both antennas at the same time and let you
know.
The loop is probably a little quieter than
the vertical but the vertical is very good because of my low environmental
noise. Only rain static QRN bothers me like everyone else hi
73 de Mal/G3KEV
Hi Mal,
thanks for very intersting info. Yours and
others levels of nois and signals are very useful for me to give me
an impression of my new umbrella. Was it worth the amount of sweat
and ?? So dont hesitate to go on measuring. I am based on Siemens
Pegelmesser D 2108 and W&G SNA-1. RX is an FT 1000 250Hz IF-BW with
commercial frontendfilter plus notch for our qrg.
TX is not yet ready but I work on
it.
So vy 73 de Peter, dj9dw.
