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Tropo of 24-25 August 2019




 The general situation :

1-AIS RX  

Sorry, i forgot to make screenshots ;-(

Not a big tropo, but at least some qso's...



2-The Tropospheric ducting predictions 






3-The troposphere profile

No data...

4-The surface pressure charts
 
They can be found here


5-The visible or IR maps - Eumetsat
copyright 2019 EUMETSAT

No picture...

 7-The reports and some comments

On 24/08:
-1602z ZS5DJ -7db on JT
-1623z ZS5LEE -12
-1741z ZS5DJ on SSB 55 (Rx me at 53)

On 25/08:
-1044z ZS5LEE -10db
-1525 ZS5DJ -12db


8-Equipment at FR5DN :

On 2m:
In "beacon mode", 25-30w out into 17el F9FT-13dbd yagi at 7m above ground.
Old PC dedicated to the 2m station for digital modes and AIS receiver (modified FT-2500M).
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.


On 70cms:

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.


The antennas used for the qsos:





Tks to All, and see you next opening !

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