LF,
I'm going to do some /p CW tests in an hour. QRG is then 136.5 kHz.
The TX is my usual LF antenna in the city, keyed via a UHF link out of
about 2 km distance. That should be a quiet location.
The first time all the stuff finds its place in a backpack. See:
http://dl.dropbox.com/u/19882028/LF/UHF%20Link.JPG
Not sure if the antenna has enough gain for the distance but i expect
it will be ok.
Note that i am using the active ferrite antenna for RX. Thus it
may happen that i am nulling out a calling station, so it is worth to
call several times, if you like.
The PTT of the TX is quasi connected to the squelch LED of the UHF RX.
That works very fine up to >125 Bpm. But maybe it opens sometimes
due to a local noise. To the PTT circuit i have added a time limiting
watchdog circuit that limits such an unwanted opening to about 10
seconds.
So, looking forward to some QSOs or at least a succesful
testing. BTW there is no possibility to answer in QRSS. It is still CW
exclusively!
73, Stefan/DK7FC
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