[UK-CONTEST] OT- Attenuation and IMD3

[Bob Henderson]

2009/10/28 Clive Whelan <clive.whelan at btinternet.com> wrote:

>
> As far as SSB is concerned, a quick flick around the bands at the
> weekend was sufficient to convince me ( if that were needed!) that any
> rx deficiencies are blown away by the appalling quality of the average
> signal there. I didn't know about the issue with the K3 I must say, and
> my own experience  would indicate that -27dB third order would
> significantly degrade the  CW signal. This is based on  listening to
> many Yaesu Quadras  which  are probably in the low 30's and are very
> clicky beasts indeed.
>

Yes indeed.  The keying sidebands produced in the exciter will surely be
magnified by poor 3rd order performance in the amp.


>
> Thanks again for the input. The bottom line seems to be that attenuation
> rules!
>

Nothing else gets close in terms of VFM.

73

Bob, 5B4AGN