[Elecraft] K2 Power Problem

[Don Wilhelm]

Larry,

I suggest your first step is to count the turns on all the toroids in 
the Low Pass filter area.
Count the number of times the wire passes through the center of the core.
One extra turn would lower the cutoff frequency of the low pass filter.
Since many bands are arranged in pairs - 40 and 60 meters are paired, 30 
and 20 are paired, 17 and 15 are paired and 12 and 10 meters are 
paired.  It looks like the higher band of each pair is giving you 
problems.  Since 12 and 10 meters are close in frequency, the cutoff may 
have dropped below the 12 meter point.

Again, check the number of turns on the toroids as a first step.

73,
Don W3FPR

Larry Christensen wrote:
>    I was working on my new K2 Alignment and Test Part III
>    All was going well until I got to the 40 Meter TX Alignment page 78
>    I  followed  the  instructions but when I got to the "put K2 into TUNE
>    mode  to peak the L1 I had not RF out. the display showed P.01 not the
>     P2.0
>    I was expected.
>    I  tested  and  checked  and  could  not  find the problem. So I tried
>    another band.
>    This is what I found with the power out set to P 2.0
>    80M P 2.0
>    40M P .01
>    30M P 2.3
>    20M P .01
>    17M P 2.2
>    15M P 2.0
>    12M P .01
>    10M P .01
>
>    I have 4 bands with RF out and 4 band that do not.
>    I  am  missing the  common  connection  in the 4 bad bands and what to
>    check next or what the problem could e.
>    I have check the obvious but I am missing something.
>    I  have  got  through  the  reflector  archives and have not found any
>    posting with this problem
>
>    Thanks in advance for any help
>   
>