[Elecraft] KRC2 with Dunestar Model 600

[iain macdonnell - N6ML]

On Thu, Jul 14, 2011 at 12:35 PM, Ian Kahn <ak4ik.ian at gmail.com> wrote:
> Does anyone have any experience with Elecraft's KRC2 band decoder/switcher
> and the Dunestar Model 600 multi-band bandpass filter?  I'm contemplating
> this combination for use with my K3 and would love the opinions of anyone
> who has used this combination.  I want to make sure I get automatic band
> switching with the band pass filter so I don't accidentally smoke the filter
> by forgetting to change its band as I change radio bands.

Although the switching works fine, I have a problem with this
combination, in that the KRC2 seems to produce strong birdies, of a
sort, on the 10m band. The birdies alternate between two frequencies a
couple of kHz apart every second or so, with the time spent on each of
the two frequencies drifting back and forth. There are harmonics of it
all over the 10m band. It sounds like a timer of some sort in the
KRC2, and it goes away if I power off the KRC2 (and activate the 10m
filter by other means). I'm not sure if I have a defective KRC2, or if
it's a fundamental flaw. I've reproduced it with two different
Dunestars, but only tried with one KRC2. I still need to dig into it a
bit more...

73,

    ~iain / N6ML