DJ0IP wrote:
>Here CORRECTED:
The latest TT instruction sheet (P/N 74089-C) corrects the 250
Hz #219 filter for Shape Factor and Insertion Loss as follows:
MODEL: 217 218 219 220
------------------ ---- ----- ----- ------
C/F 9.00xxxx MHz: 0750 1500 0750 1500
6dB BW, Hz: 500 1800 250 2400
S/F, 6/60 dB: 2:1 1.8:1 3.5:1 1.7:1
Ins. Loss, dB: 7.5 2.0 14.0 2.2
Ult. Rejection, dB: 90+ 90+ 85+ 90+
Z in & out, OHMS: 200 200 200 200
Number of Poles: 8 8 6 8
73, Bill W4ZV
P.S. Now you can see why the extra 12 dB amplifier is
OK for the 250 but too much for the 500.
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