The #14 wire and the large cores which I use address the requirement of
operating at full power of 1.5 kW. Not that I use that much, but on
occasion on 75 and 160, it is required. There's no doubt your choke will
introduce a bit more loss than my large units, but you should be OK with
100-watts. Key down in CW at 100-watts for a few minutes with the output
of the choke connected to a dummy load and see how much heating occurs. If
minimal, you're fine. If too much heat, yes, larger core and wiremay be
required, but I would venture a guess that you're fine.
Your plots look just as I would expect. Now you have a 'real' balun / CM
choke. Give yourself a pat on the back, just for me......?? And, you've
learned a whole bunch on the way. Good work!
Dave - W?LEV
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On Fri, Nov 6, 2020 at 5:04 AM <deadman1966@...> wrote:
Dave,
I had some 18awg coated solid copper wire i stripped form a piece of
thermostat wire and managed to get 16 loops onto the core. I am 3d printing
a centre insulator for the two wires form the windcamp since their balun
serves that purpose as soon as i get that done i will get this unit on it
and do some readings.
In the interim i have installed a 50ohm resistor to one end and connected
the other end to the nanovna and tooks some readings that are attached If i
read them right it looks like I did something right. It seems to me these
are the sort of readings i should have gotten form the 1:1 balun that came
with the antenna.
One thing I am not sure of is how much power i can transmit through the
unit with 18awg instead of 14. I did order some of the wire you mentioned
could you perhaps let me know what cores you use so i can order the larger
ones.
I want to thank all those the have responded to this thread i have a much
better understanding now on how measure and read results on the nanovna as
a result of all the help.
--
*Dave - W?LEV*
*Just Let Darwin Work*
