On Wed, 2 Mar 2005 20:45:11 -0500, Bill Coleman wrote: > > > 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.
>> I think that "it doesn't have a great VOX", is a bit of an understatement. >> It is not adjustable in threshold, it is insensitive, and has no Anti-VOX. >> It lets an otherwise excellent transceiver down. >> 73 >> Stewart G3RXQ > > 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 > > _______________________________________________ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
