[TenTec] Actual TT219 250 Hz Bandwidth?

[Carl Moreschi]

Bill,

I just measured my 250 hertz filter in my Orion at 258 hertz between the 6
db points on the Orion S meter.  I set the DSP filter to 1000 hertz and
manually selected the 250 hertz filter to do this measurement.

73,

Carl Moreschi N4PY
Franklinton, NC
----- Original Message -----
From: "Bill Tippett" <btippett at alum.mit.edu>
To: <tentec at contesting.com>
Sent: Thursday, September 11, 2003 6:16 PM
Subject: [TenTec] Actual TT219 250 Hz Bandwidth?


> Hi All!
>
> Has anyone actually measured the 6 dB BW of
> the TenTec 219 "250 Hz"?  The reason I ask is someone
> accidentally sent me a 217 and of course I immediately
> realized it was wrong.  However, I measured it at 645 Hz
> for 6 dB BW.  If the "250 Hz" 219 is off by the same ratio
> (645/500 or 29%), it will actually be around 322 Hz wide,
> which I don't feel is worth bothering with versus my Inrad
> "400" which is actually 455 Hz wide.  If the 219 only has
> a 133 Hz narrower BW, I may just forget about it.  I was
> hoping the TenTec would be >200 Hz narrower than my
> Inrad but it appears TT suffers the same BW spec inflation
> that Inrad does...at least Inrad gives you the actual BW
> on their website.
>
> What I really need is an ACCURATE 6 dB BW
> measurement of the TenTec 219 250 Hz filter so I can
> decide whether to swap filters or return the 217 for credit.
>
> 73,  Bill  W4ZV
>
> P.S.  BTW, Inrad's "250 Hz" is actually 315 Hz per the
> measurements on their website, which is why I decided
> against buying it when I originally got my Inrad 400.
>
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