[Elecraft] K3 SSB - Is the 5 pole filter good enough

[Barry N1EU]

Bill, I think the 2.9Khz bandwidth measurements for that filter were taken at
r.f. - for whatever reason, that bandwidth is not translating into a.f. -
I've seen a.f. measurements done on about 5 samples of the 2.7Khz filter and
they all run several hundred hertz narrower than the 2.9Khz figure.

73,
Barry N1EU



Bill W4ZV wrote:
> 
> 
> 
> Stewart G3RXQ wrote:
>> 
>> 
>> On USB the trace was substantially flat with the -3dB points at
>> 430Hz and 2.77KHz. Not too bad and could probably be improved by
>> moving the carrier offset frequency.
>> 
>> 
> 
> One more point.  The -3 dB bandwidth you are reporting is only 2.34 kHz on
> a filter that is typically 2.9 kHz at the -6 dB points (mine and the one
> measured by Elecraft below).  That seems very strange also.
> 

-- 
View this message in context: http://www.nabble.com/K3-SSB----Is-the-5-pole-filter-good-enough-tp15664900p15670025.html
Sent from the Elecraft mailing list archive at Nabble.com.