Hello Wolf,
If you transmit on 8971 Hz, than you are not visible on Muskus' or my grabber
(unless you are not visible in DFCW-60 but i don't think that ;-) ). Could you
transmit on 8970 +- 0,05 Hz? How accurate is your frequency?
If you are using a closed loop, you may have a high reactive component in your
Z. Maybe you can measure the voltage and current (e.g. with a 1 Ohm shunt
resistor) with an oscilloscope and watch the phase. Than you can calculate Z
(=U/I) and read out the phase angle phi. Than your XL= Z*sin(phi). If you add a
C inseries to the loop, with C = 1/(2*pi*f*XL), you can compensate the
inductive component and your Z = R! With this low R, i assueme 1...3 Ohm it may
be easier to get the TX power into the antenna...
Best 73 and good luck!
Stefan/DK7FC
________________________________
Von: [email protected] im Auftrag von Wolf Ostwald
Gesendet: Sa 05.06.2010 10:48
An: [email protected]
Betreff: LF: new output ratio txfrmr
Stopped TXing at 0845 on 8971 due to heavy mismatch. I`ll build a ferrite based
autotransformer to achieve max. ant current. Will keep u posted :-)
wolf
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