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Re: An experiment 2.4 GHz SS Cordless vs Weak Signal

I have two Siemens systems in my house. On my Yaesu FT-847, the Siemens systems
completely block any signal on the 2401MHz band pegging the meter at S9 - but
when I had a Yaesu FT-726 it just heard the popping noise. I currently unplug
just the Siemens bases when I work AO-40.


Don Woodward
AMSAT 33535

----- Original Message -----
"Joe Leikhim" <jleikhim@nettally.com> wrote ...
Subject: [amsat-bb] An experiment 2.4 GHz SS Cordless vs Weak Signal

Having just recently purchased a Siemens 2402 cordless phone base and 3
handsets I decided to see what effect the phones would have on my
receiving setup. As I have yet to get my dish up, the experiments were
indoors with a G3RUH feed, an SSB SP13-Oscar preamp and an ICOM 970A
with UX98 module. What I found was that the Siemens system and 3
handsets (in idle mode) produced a strong popping sound throughout the
2400 to 2450 band. The good news is that the noise blanker in the IC970A
was effective in stopping all of the popping noise. Using the weak
harmonic from the LO of a nearby crystal controlled receiver, the beat
tone was clear of any popping. Obviously, more controlled testing is in
order to determine more accurately any rise in the noise floor caused by
these devices.

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