Broad and small band radiation of Issoudun unit:
# Only two minutes to check gauge.
1755 to 1757 UT, then OFF TX sharp.
Main peak exact precise centered 17800.081 kHz today Febr 25.
Very broadband signal 13 kHz each side = 26 kHz in total.
1st peak on 17847.0 to 17873.0 kHz.
 8 kHz wide signal
center is 11996.424 kHz at 1808 UT,
1st peak at 11991.700 kHz,
last peak at 11999.800 kHz, ditters top to 12001.400 kHz.
& when tuned in 1930 to 1936 totally OFF air.
then observed a very narrow signal of 3 kHz only,
both flanks only 1500 Hertz.
Start lower flank on 11999.471 kHz,
upper flank end at 12000.971 kHz.
I guess this Issoudun TX unit has a similar TX HF quarz amplifier problem,
like the unit at Montsinery GUF now last since at least two months and
reported again and again by Glenn Hauser.
But GUF will be ceased totally on March 31 and scrapped then ?
73 wb
advancing age of the tx HF control equipment in ISS and GUF :
from dxld archive, 13-07 of Febr 13:
Thanks to Jeff White at HFCC Tunis, I have been in contact with the
person at TDF responsible for the MSY transmitters: (gh)
Gentlemen, Thank you for your information and comments regarding some
unwanted radiations of a MSY Tx !
After the measurements we did in Issoudun - France mainland - our
technical staff in Montsinery has been required to check the Tx and a
default would have been identified in a "low power HF amplifier".
Unfortunately we will have to wait some weeks to get a spare HF
amplifier because, for the time being, there is no such spare
amplifier in MSY. Sorry for the delay!
Best regards
(Daniel Bochent - for TDF, Feb 8, WORLD OF RADIO 1656, DXLD)
----- Original Message -----
From: "Ivo Ivanov" <ivo.observer@xxxxxxxxx>
To: "'Wolfgang Bueschel'" >
Sent: Monday, February 25, 2013 1:53 PM
Subject: [dxld] RFI and RTV Algerienne
FRANCE/ALGERIA Frequency change of Radio and TV Algerienne from
Feb.24:
0600-0605 NF 7295 ISS 500 kW / 194 deg to NWAf French nx bulletin, ex
5865
0605-0658 NF 7295 ISS 500 kW / 194 deg to NWAf Arabic Holy Qura'n, ex
5865
New frequency 7295 is not registered in HFCC database effective from
Feb.24
FRANCE Again strange frequencies of Radio France Internationale in
French
1700-1758 # 17853.35 ISS 500 kW / 155 deg to CeAf // 17860 from same
tx!!!
1800-1858 Â 11996.45*ISS 500 kW / 204 deg to NWAf // 13740 new from
Feb.24
1900-1958 & 12001.00*ISS 500 kW / 185 deg to WCAf // 13740 new from
Feb.24
* but no signal on fundamental 11995 which was changed to 13740 from
Feb.24
No problem on other freqs of RFI 04-09, 12-13, 20-22, checking on
Feb.24-25
FRANCE(non) Unchanged frequency of Radio France Internationale in
Swahili
0530-0558 on 11790 MEY 100 kW / 007 deg to EaAf not 15160 on Feb.24 //
9835
73! > Ivo
*QTH*: Sofia, Bulgaria