[TenTec] Orion II on order, filter questions

[Carl Moreschi]

This problem was fixed with the O2.  It looks like the manual needs
updating.

Carl Moreschi N4PY
121 Little Bell Drive
Bell Mountain
Hays, NC 28635
----- Original Message ----- 
From: <ac9s at mchsi.com>
To: <tentec at contesting.com>
Sent: Sunday, June 04, 2006 5:05 PM
Subject: [TenTec] Orion II on order, filter questions


> Hi - I succumbed at Dayton and ordered a new Orion II.  To be truthful I
have
> been studying the 7800, 9000 and Orion II literature pretty seriously for
a
> while; the tipping point was Rob Sherwood's updated posting of receiver
> performance plus my own distrust of Yaesu build quality of late.
>
> Since I have to wait until June 10 at least for the new O2 to be shipped I
> have had a chance to just about memorize the manual.
>
> The question - the manual recommends using a moderately wide CW roofing
filter
> (1 khz) for general, non crowded, weak signal dx - due to increased loss
with
> narrower filters.  In the QST review of the original Orion, dynamic range
> decreased with the narrowest roofing filters - the thought being the
> compensating amplification was the culpret.  Since Sherwood listed the
same
> 95db dynamic range at 1 khz using the new 4 pole 300 hz filter as it did
at 2
> and 20 khz with wider filters is the manual's recommendation still valid?
>
> - What is the narrowest filter for which there is no compensating
amplifier?
> - Would that be the recommended filter roofing filter for general weak
signal
> dxing?
> - With the new 4 pole roofing filters does it make any difference?
>
> Thanks much - anxiously awaiting the hardware.  I have a couple of other
> questions related to amp interfacing and PSK / FSK, but I'll wait with
them.
>
> Keith - AC9s
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