The first FT8 contest
Needs the latest WSJT-x rc5
PG7V contest agenda shows how to prepare.
But i choose to install a separate instance of this rc5 version
to keep the existent WSJT-x 1.9.1 unchanged
Installed WSJT-x rc5 not default but to WSJT-xRC5
Then renamed copy of shortcut:
Change property target:
Target: C:\WSJT\wsjtxRC5\bin\wsjtx.exe --rig-name=Roundup
Start in: C:\WSJT\wsjtxRC5
A separate instance starts when clicking this shortcut
all logfiles are virgin.
wsjtxlog.adi is not created yet it will when the first FT8 QSO is logged
This WSJT-x rc5 must be configured as a new install
User , radio frequencies for RTTY
I managed 132 QSO i heard a lot more then I could work
screen full USA but even with extra power it was hard to be heard
This contest exchange uses real reports!
529 539 539 559 ....
The maximum report i saw 589 not a single time 599
The whole contest takes only 2.7 kHz per band !!
Log upload did not work
The Cabrillo file missing received exchange field
The imported wsjtlog.adi does have the
Also the ARRL 160m contest was this weekend
Dissapointing propagation , signals faded after a promessing start .
Only stations with EU interest could be worked
FL MO CO sometimes strong but no ear for EU
More like a National contest.
Rx deaf ( again)
My diagnose: preamp ADL5531 defect
The FL1500 was away for the same reason by a Flex specialist.
It was okay some time but sudden went "deaf" while testing with Beverages switching E/W 12V over coax galvanic separated
for many years without trouble with a K9AY loop before.
Both transverter inputs XVTX/C and XVRX have internal protection diodes type GBLC03C Protec.
Specification 8kV contact 20kV /25kV air 350W pulse
clamping 3.5 4V seems very well protected.
Hard to believe that this DC switching could do any harm.
This time i repaired it myself
But what was told to me is right, this is a specialist job.
Very tiny ADL5531 device with its mass connection underneath...
I got a spare ADL5531 from eBay
This was a most difficult SMD repair job
But with succes
The ADL5531 was broken as thought.
No other parts damaged lke the PE42641 1:4 switch at the input
or the band switches PE4259
Even harder to explane why the ADL behind the switches and band filters could damage without damaging other parts.
They all worked normal i can switch the Antenne ports and
tune XVTX/C is about 0dB signal level.
The FLEX1500 RX board the ADL5531 IC3 is mid under
Just above the yellow block C
It was interesting to explore the FL1500 circuits and how well designed !
The lowest frequency that can be generated from the XVTX/C port with a decent sinusiod shape is 491.626 kHz
Tune 1Hz down and the output changes to garbage ! That is so sorry.
One would think this needs only a small modification in the firmware?491.625 kHz