On Mar 1, 2005, at 5:07 PM, [EMAIL PROTECTED] wrote:
I use my K2 on CW and SSB. I was wondering how K2 Hams would feel about
different grades of SSB adapters.
I've voiced this several times, but I'll reiterate.
I think the KSB2 is a great value at $89. It works, and gives
reasonable performance. My K2 is probably unique in that I am using the
"1.9" filter values as designed by KI6WX. (the bandwidth is closer to
2.0 - slightly narrower than the original filter values, but (most
importantly) with a lower passband ripple).
However, the KSB2 leaves a little bit to be desired.
1) it doesn't have a great VOX. The VOX works better with higher
compression levels. If your mike has a low output, it may not trip.
Although the K2 has enough overall gain (and there's another KI6WX mod
to increase the tx gain), a bit of mike amplification would be an
improvement.
2) the filter passband is kinda sloppy. It's actually amazingly good
for its use of seven inexpensive crystals. Most radios use precision
crystal filters that cost as much as the KSB2 or more. But, I'd be
willing to pop for a more expensive unit that had a quality SSB filter
with steep skirts and very little passband ripple.
3) single filter bandwidth. Even though the K2 has OP1-5, indicating
that perhaps there are selections that can be made, there's only one
filter. Two filter bandwidths would be nice - a wide and narrow, like
most radios.
Of course, there is very limited space in the K2 for the KSB2 or
filters. The KSB2 is already the hardest module to build, with the
highest component density.
Bill Coleman, AA4LR, PP-ASEL Mail: [EMAIL PROTECTED]
Quote: "Not within a thousand years will man ever fly!"
-- Wilbur Wright, 1901
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