[TenTec] Need info on a 6-pole Ten-Tec filter with a 8043 stamped on a crystal

[Jerry Volpe]

I thought I had some notes here on this but can't find them. Anyway here 
is my question:

I have a filter that was suppose to be a model 217, 500 Hz 9MHz. It came 
in a used Ten-Tec Omni-C. There was far more loss through the IF than 
what I would have expected with this filter inserted so I began 
troubleshooting (I had an Omni-C for 24 years so I knew it wasn't 
right). I could find nothing wrong with the filter switching circuit or 
the two-gain setting buffer amplifier (provides more gain when this 
filter is inserted). Next I disassembled my Argosy that had a nice, new 
217 filter in it (I bought it myself some time back). The filter out of 
my Argosy is clearly stamped a model 217 with another part number of 
8036 on one of its crystals. This filter works great in either 
transceiver. It is also an 8-pole filter. The suspect filter I had 
finally pulled from the Omni-C transceiver has only 6-poles. It also has 
no stamped on model number. There is a 8043 part number stamped on one 
of its crystals.. I suspect it might be the Ten-Tec 250 Hz, 9MHz filter 
as the passband is around 750Hz but with more attenuation than the 217 I 
know is good.  Any info?

73,
Jerry

-- 
Ralph Jerald "Jerry" Volpe
Amateur Radio Operator KG6TT
ARRL Member & VE
FISTS 12304

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