[TenTec] Sherwood Presentation

[tongaloa]

Charlie, W0YG wrote:

>The problem with the 500 and 250 Hz filters is the design of the filter
>board itself.  Let me try to explain.
>
>The filter board is designed for one bank of five filters and one bank of
>two filters.  When either the 250 or 500 Hz filters are selected, being in
>the secondary bank if I can call it that, the 20 kHz filter is switched in
>ahead of either.  Since both the first filter bank and the second filter
>bank have filter loss amplifiers ahead of the filters, that puts two filter
>amplifiers in the filter train when either 250 or 500 Hz filters are
>selected.
>
>There is some talk of switching in the 2.4 kHz filter ahead of the 250 and
>500 Hz. This would be in lieu of the 20 kHz filter that is currently
>switched.  This mod would provide a bit more capability to reject close in
>interference by the two narrow filters but is not a final answer.
>
>The fix for this is twofold.  One, a redesign of the filter board so that it
>incorporates one bank of seven filters is required. This would allow TenTec
>to have one amplifier to overcome each filter's loss.  The other cure which
>should be incorporated at the same time would be to design filters
>especially for the Orion instead of using Omni 6 filters which was expedient
>for TenTec in the first place and an economic decision.
>
>  
>
Sounds like a project for B Sherwood or ???