[TenTec] Roof filters (N4PY and KC9CDT)

Barry Gross barry.n1eu at gmail.com
Wed Mar 15 12:41:40 EST 2006


Yes, the v1 audio response at 0dB was much flatter than v2.  There's also a
rolloff at low freq (<150hz) in v2 such that it can't be restored with the
EQ control to have the same low end extension as v1.

73, Barry N1EU

On 3/15/06, Bill Tippett <btippett at alum.mit.edu> wrote:
>
> I wrote:
>
> >Everything looks (using Spectrogram) and sounds
> identical and PBT works correctly on both.
>
>          Well maybe not identical.  Bandwidth is
> identical but SSB audio response is not flat
> according to Spectrogram.  Also the audio
> response for Main RX is slightly different
> than for Sub RX.  Main seems to slope up
> slightly and Sub slopes down slightly.  With
> 0 dB RX EQ, both should be perfectly flat.
> You can also hear this in the character of
> the noise when you switch between the two.
> The same is true in CW mode also.  Maybe
> EQ needs a little more tweaking.  I'm not
> sure if this is a problem in V1 or not since
> I've never really checked it before.
>
>                                  73,  Bill  W4ZV
>
>
>
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