Tom,
The best R98 value varies a lot from one K2 to another. If the amount
of 10 meter gain reduction is acceptable to you, then you have achieved
success. Since you ended up with 1.8k, that would indicate that your K2
has greater than average gain. On 10 meters the K2 has the least gain,
so that is why 10 meter power reduction is the indicator for the largest
value R98 that is feasible.
I find that aligning the 10 meter bandpass at 28.4 MHz will allow better
coverage of the 10 meter band. Take your pick here - if 10 meter CW is
your major operation, I would suggest that 28.200 is the proper
alignment point, but if you want to operate over the greatest section of
10 meters, use a frequency higher in the band. Don't forget to re-align
the 12 meter bandpass after aligning 10 meters.
73,
Don W3FPR
Tom Arntzen wrote:
Hi Eric and Don.
I decided to do the k2 power mod involving r98 rf board.
The first thing I did since 10m is the key here was to do a full
alignment of 160-10m tx adjust per manual.
When aligning 10m the manual states 28200.
I would sugest that the manual states "highest frequency that would
give 10 watts out on 28000khz"
For me that was 28550 which also gave 9,5 watts on 29000.
The max for 29550 was 12 watts.
After adjustments I set PO28 to 10 watts.
So a question for Eric and Don.
I used a 2k pot for the mod and the point where the rf dropped a
little was at 1,9Kohms.
I inserted a 1,8Kohms.
The rig is a lot more stable now on all bands.
If you see any concernes here please let me know.
BTW...This buity worked VP6DX 3 times on 20,17,15m cw from a lattitude
of 66,2 north.
A little help from THP 1.2KFX I must admit.
And Eric...If I order a K3 now , when would my mothers creditcard be
charged? :-)
What would I need in a K3 to do a SO2R with my K2?
K2/100 3829
Tom Arntzen LA1PHA
Mo , NORWAY
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