[TenTec] 500 HZ Roofing Filter Attenuation-Orion

[Toby Pennington]

Barry, The drop in receive audio is very noticeable when there is no signal
in the pass band  and you roll the BW from 380Hz down to 190Hz. However,
when there are signals of moderate to strong strength you don't notice the
drop. It is only when there is a very weak signal in the passband that the
500HZ roofing filter seems to attenuate or "squash" the signal. If my
roofing filter isn't bad ( which it could be) then it would be better to
turn the 500HZ filter off for weak signal work.  Toby W4CAK

----- Original Message ----- 
From: "Barry N1EU" <n1eu at yahoo.com>
To: <tentec at contesting.com>
Sent: Wednesday, August 04, 2004 9:31 PM
Subject: [TenTec] 500 HZ Roofing Filter Attenuation-Orion


> As far as I can tell, what you're observing Toby is
> the current normal behavior of the Orion's 500hz
> roofing filter.
>
> 73,
> Barry N1EU
>
>
> "I have noticed that on 20 mtrs  with all the roofing
> filters turned on to AUTO, that there is considerable
> attenuation of receiver audio when the bandiwdth hits
> the 370 HZ level."
>
>
>
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