between them. You can then run the K2 in a more linear range, and
guarantee a good load at all times. I would try 6 dB. Of course,
>Steve,
>
>Remove the KAT2 and the external wattmeter and try the following experiment.
>
>Compare the output variation possible from the K2 when driving a 50 ohm
>dummy load with the K2 output developed when driving the amplifier. If you
>obtain the same results, blame the K2, but if you find different results,
>blame the amplifier. Analyze that data first and correct whatever is wrong.
>
>You may have to swamp the input of the amplifier to obtain a stable 50 ohm
>load for the K2. The power control circuitry in the K1 is different than
>that used in the K2, so a comparison with the K1 will not provide valid
>conclusions - the K2 will seek to provide an RF voltage across the antenna
>terminals which matches that required to obtain the requested power into a
>50 ohm load. I suspect your amp does not present a constant 50 ohm load to
>the K2, and the KAT2 and external wattmeter each may be adding its own piece
>of the action too.
>
>With the KAT2 and external wattmeter in line and driving the amplifier,
>there are just too many variables to deal with and still draw valid
>conclusions - each element may be contributing to the effects you are
>seeing. After you narrow things down, you can start adding each piece one
>at a time and analyze any changes in behavior due to adding that element.
>
>73,
>Don W3FPR
>
>
>
>>-----Original Message-----
>>
>>I am trying to use my K2 to drive a little HFPacker amp I built. The
>>amp needs 2-2.5W input, but I am having trouble setting the K2 output.
>>For requested levels around 2W, I get 1.5-1.7W as measured by both
>>internal and external wattmeters and a simple RF voltage probe. This is
>>into both a good dummy load and the packer using key down and CALP. My
>>K1 is spot on with output into the amp. When I increase the requested
>>power to 2.2-2.5 W, power out jumps to 3-3.6W, so I am unable to get 2
>>to 2.5W. Above and below this range, the requested vs actual output is
>>fine. I've read most of the archives about requested vs actual power,
>>but I didn't find anything about too much output at low requested
>>levels. So before digging into this, I thought someone might have some
>>ideas about the problem, if it actually is a problem.
>>
>>Thanks,
>>
>>73, steve, kx7r
>>
>>
>>
>>
>
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