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

[Paul Christensen]

Bill,

My only concern with a 10-pole filter in the 9 MHz slot is that the CW
transmit BFO frequency of 9,000.400 kHz *must* fall within the flat and
linear portion of the lower filter skirt.  If this frequency is anywhere
near the knee of a 10-pole filter, I guarantee that the transmitted CW
waveform and note will fall apart.

I would suggest to George that these sample five filters be thoroughly swept
and their linearity tested at the above frequency.  Just a thought...

-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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