[Elecraft] K3: Why can't I use my 1.8kHz filter for SSB TX?

[David Woolley (E.L)]

One possibility is that the rig has only been type approval tested in 
that configuration, so anyone wanting to operate it with a different 
filter would require a professional RF spectrum analyzer.

Top posted through policy, not belief.

Brian Machesney wrote:
> reflector. The only "authoritative" information I found information was this
> from July 2008:
> 
> "Until further information to the contrary is available from Elecraft, you
> must select the 2.7 or 2.8 filter for SSB, Data and CW transmit. The AM
> transmit filter must be 6 kHz and the FM transmit filter must be 13 kHz. Any
> other settings will result in failure and a ERR TXF (Error TX Filter)
> message.

-- 
David Woolley
"we do not overly restrict the subject matter on the list, and we
encourage postings on a wide range of amateur radio related topics"
List Guidelines <http://www.elecraft.com/elecraft_list_guidelines.htm>