[Elecraft] KSB2-Filter Measurements

[Vic Rosenthal]

VR2BrettGraham wrote:

> An INRAD CW filter for the K2 is already available, but W2VJN
> suggested to me I might not want to buy one as it's hard to use - no
> ability to select it - so no point in doing more than a limited production
> run & call them prototypes.  Even then, the cost was not far into the
> USD three-digit range - easily justified based on the expectation of
> what it could do, but perhaps a bit too dear seeing how it ended up in
> the junk box (being stuck having to always listen through the INRAD
> filter equally wasn't on).

...and also it hasn't been possible to take advantage of the filter 
characteristics, as far as I know.  I have one of these prototypes in my junk 
box because even by hard-wiring it into the circuit I was unable to get 
sufficient isolation to reduce the blow-by to an acceptable degree.  The stock 
filter arrangement is better.  George (JVN) did some work, but I don't know if 
he found a way to use it successfully.

-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco