Hi Bob, Wolf, LF,
Am 15.02.2014 20:46, schrieb wolf_dl4yhf:
Hello Bob and all,
It's much easier to put a good sigs out on 472 than 137 or
73. Countless new modes to use and band conditions much more
predictable on 600 meters.
I agree as far as PEP-versus-ERP is concerned.
Hah! Was that a joke?
That would mean that generating a high transmit power is easy? Why are
then several stations running a Yuma TX (50W) into a poor antenna or
modifying a IC-735 to get a few watts RF power on MF? If someone has a
very limited antenna size and wants to run a solid signal anyway, why
are there not many many more kW transmitters on air? Obviously it seems
to be a problem for some to put a few MOSFETs together, with a suitable
driver and low pass filter. A kW PA for LF/MF can be built for about 50
EUR but people prefer to buy a ready to use transmitter. And
thus, i have to conclude that it is not easy to put out a high PEP, not
only PEP/ERP, at least for many stations.
Bob shows what is possible on TA work on MF, allowing several stations
here to get good decodes from him. With a 50W TX, as the PA, not the
PA-driver, you would probably struggle to get a WSPR decode. Same for
LF of course.
Everything is easy if you know how to do. Same for the ERP. Just use a
kite... But...
73, Stefan/DK7FC
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