A call to Paul Clinton at TT service straightened me out. The filter is
working properly. My analysis of the situation was wrong.
Mark
----- Original Message -----
From: "Mark Erbaugh" <mark@microenh.com>
To: "Tentec (E-mail)" <tentec@contesting.com>
Sent: Sunday, February 23, 2003 13:14 PM
Subject: [TenTec] Omni VI (opt 3) and 219 Filter
> I recently replaced the 218 filter in the N2 position of my Omni VI (opt
3)
> with a TT 219 (250 Hz CW) filter that I removed from an Omni V. The filter
> was purchased from TT in 2001 and was working when removed from the Omni
V.
> However, in the Omni VI it doesn't appear to work. I did move the gain
> jumper as per the instructions to the high setting.
>
> The reason that I think it is not working is that when I monitor the audio
> spectrum (using MixW) the only change I see when I engage the N2 filter is
a
> general lowering of the entire audio frequency range, there is not one
> specific frequency range that stands out. In contrast, when I engage the
217
> (500 Hz CW) filter in N1, I see a definite highlighted area of reception
> (2100 - 2600 Hz in USB). These tests were done with the 6 MHz filter in
the
> 2.4 kHz setting. I reinstalled the 218 filter and verified that it is
> working.
>
> I looked at the filter itself and examined the solder joints for broken
> connections and didn't see any problems.
>
> 73,
> Mark
>
>
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