[TenTec] Re: 2.4khz 9mhz pri INRAD Filters

[Paul Christensen]

Clarification:

I realized that Bill's message was not transceiver-specific.  My preceding
message applies only to the Omni Six/Six Plus, not previous OMNIs whose
filters may be compatible in the 9 MHz I.F. stage, including the OMNI V.

The reason for my concern with the OMNI Six series is that a 2.4 kHz filter
centered at 9,001.500 kHz  is designed with a lower filter knee of 9,000.300
kHz, leaving only 100 Hz of error for adequate passband of the CW BFO
frequency.  As long as the 10-pole filter is precise with predicable QC,
this filter should still work with the Omni Six/Six Plus.

-Paul, W9AC

-----Original Message-----
From: Bill Cook <wdcook@ibm.net>
To: Greg Hodsdon <k7kj@teleport.com>; tentec@contesting.com
<tentec@contesting.com>
Date: Monday, December 28, 1998 9:18 AM
Subject: [TenTec] Re: 2.4khz 9mhz pri INRAD Filters


>
>
>
>George at INRAD will make a special order of 10pole, yes 10pole, 2.4khz
>wide  9.0015mhz center frequency  drop-in primary filters if we have enough
>people call him and place an order.  These will cost more than the 8pole at
>$110.00.  How much more is unknown(maybe in the $130.00 area).  With a
>minimum of 5 orders he did say they would be made!  The good thing about
the
>INRAD filters is the center frequency accuracy and the much better symmetry
>than
>the stock filters.  Less ripple too.
>
>INRAD telephone is:  541 459 5623
>
>Bill   N4WC
>
>
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>


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