AIS range here was not that big and strong on FR side, except for some
6h on 30/08 night. Best qrb was 2800kms for just some minutes. Most of
time AIS range was normal here.
Interesting to notice that for FR, the predictions are almost nil tropo...
3-The troposphere profile
We have seen some big signal strengh differences, on ZS side, with altitudes of ZS stations...
Seems that troposphere was just normal on FR side, radiosoundings from
here are made at Saint-Denis, on the north of the island. Just
superrefraction at "high altitude", no real duct layer. Maybe on my
west side, conditions were not exactly the same than on the northern
part of the island.
7-The reports and some comments I
started to get the beacon on TX on the afternoon of 29 august... Before
that, I was busy preparing the astro station for the solar annular
and did not pay much attention on the radio...
First signal came from Hugo, ZS5HV at 1705z on 29 august.
Stations worked were ZS5HV(55 ssb/fm) - ZS5LEE (57 ssb)- ZS2ACP (heard
once on jt then gone) - ZS2ABF (Peter was STROOOONG 59+ SSB and FM
for all qsos) - ZS2HC (55 ssb) - ZS2AH (55 ssb with his 35w
out). Several JT qsos as well.
On ZS side, the altitude of stations was making big difference.
In same sequence, for example :
ZS5LEE 600m ASL got me -19
ZS5HV 5m ASL got me -6
In the night of 29, the bcn was at 25-30w out and was heard all night.
With ZS2ABF signal was so strong that with just some 10w, maybe less, we could have worked ssb...
Audio files of Peter ZS2ABF on SSB and FM.
Signals were usually good to excellent.
Again, these qso are in reach of medium to small stations. Single yagi and some 50w.
8-Equipment at FR5DN :
In "beacon mode", 70-80w out into 17el F9FT-13dbd yagi at 6.5m above ground.
Old PC dedicated to the 2m station for digital modes and AIS receiver
For qso, i can use up to 120w out max in shack
Mast mounted LNA with BF981 feed through coax, no measurement on NF. Coax
is a low loss rigid coax LCF12-50, with some ecoflex 10.
I use separate TX and RX lines, which make things much more flexible,
RX line is standard RG-213.
RX is Kenwood R-5000.
TRX for beacon and qso is dedicated Kenwood TR-9000.
I run a now 4x21 el yagi at 2,5m above ground (lowest antennas) Low loss coax,
mixed length of hardline 7/8 and some length of lcf12-50 and LCF14-50. Power 40w in-shack, higher if needed. Mast mounted LNA 33db gain, 0.3db NF. Loss before LNA is around 0,9db. RX is separated rx : LT70s converter with FT-990, 28Mhz IF.