[TenTec] Revised TenTec 9MHz Filter ID List

[Gary Hembree]

Thanks to Dave, K1FK, I have added the latest Model 221 9MHz filter 
information to the list I posted Monday.

The following table (information obtained from Ten-Tec) lists the 
stock codes which may appear on the various 9MHz filters that Ten-Tec 
use.

Model    Center f(MHz)   BW(Hz)    Z(in/out)   #Poles   Stock Code
 216      9.002210        500        200          6       48161
 217      9.000750        500        200          8       48036
 218      9.001500       1800        200          8       48037
 219      9.000750        250        200          6       48055
 220      9.001500       2400        200          8       48058
 221      9.000500        250        200          6       48243
  -       9.001500       2700        200          4       48057

 Number of poles equals number of crystals on the filter board.

Note that the 4-pole has no model number because it wasn't sold as an
accessory filter.  This filter was stock in the Argosy tranceivers on
the RF/MIXER board and in the Corsair tranceivers on the NOISE BLANKER
board.  It does have a stock code which should be stamped on one of
the crystals or perhaps on the PC board.  Three of the 4-poles I have
purchased to date (4 total) have this number stamped on a crystal 
along with a date code (i.e. year and week: 8217).  One has only the 
date code.
My accessory filters (5) all have the model number and a date code
stamped on them, except for the latest 217 (1997) which also has the
stock code.
This information should enable you to ID those mystery filters that
are laying around the shack!
73
Gary, N7IR
gary.hembree@asu.edu

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