Last week, I asked for the group's help when I was in the field with a KX1 and
an antenna that wouldn't tune. Here's my report.
I trimmed the 66' wire that I have used as an End Fed Half Wave (with other
rigs and tuners) to 41 feet, added a 15 foot counterpoise, and the rig tuned
just fine.
I
Phil,
The electrical noise might have been a 12VDC to 120VAC inverter or perhaps a
bug zapper. Just a guess.
73,
BILL GERTH, W4RK
Jefferson City, MO
First Licensed 1954
CWOPS #459
4 States QRP Group
KX3 (S/N 112)
On Aug 22, 2013, at 12:23 PM, PHILIP GRAITCER pgra...@me.com wrote:
Last week,
Electric fences can make a lot of RF noise. --wunder, K6WRU
On Aug 22, 2013, at 10:38 AM, Bill Gerth wrote:
Phil,
The electrical noise might have been a 12VDC to 120VAC inverter or perhaps a
bug zapper. Just a guess.
73,
BILL GERTH, W4RK
Jefferson City, MO
First Licensed 1954
Bill,It is probably an AC inverter.When using my KX3 in my RV I have to turn
off the inverter, QRM is very bad from it.Emory WM3M
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Phil,
If you can get 3.5 watts or greater with a 13.8 volt supply, the KX1 is
performing better than specifications.
I would hesitate before trying to get 5 watts or greater out of it
unless you are willing to re-design the low pass filter and install LPF
capacitors with a higher voltage
Phil -
It is probably unusual to get a full 5 watts out of a KX1 even with a 12V
or slightly better power supply. You might get pretty close if everything
is perfect, but I'm happy to see 3 watts on mine.
Of course, its alway amazing what you can accomplish with only 1 or 2 watts!
Chip
AE5KA
Note that the KX1 is not a 5-watt rig.
The specifications say 3-4 watts output with an external 12V supply and
1.5-2W when running from a fresh internal battery pack delivering 9V.
Of course, the difference between 4 and 5 watts is only 20% - just about the
typical error in good RF wattmeters
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