[TenTec] Re: 1 kHz IMD with Preamp ON/OFF

[John L Merrill]

Don't want to start any arguments but it's a 4 pole filter.

-----Original Message-----
From: tentec-bounces at contesting.com
[mailto:tentec-bounces at contesting.com]On Behalf Of Marijan Miletic, S56A
Sent: Tuesday, December 23, 2003 5:40 AM
To: tentec at contesting.com
Subject: [TenTec] Re: 1 kHz IMD with Preamp ON/OFF


>Looking at the filter there are only 4 crystals.

Each crystal has series and parallel resonance which makes 8 pole filter!

It is difficult to achieve 1 kHz filter shape factor better then 1:3 at 9
MHz.

73 de Mario, S56A, N1YU



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