This information may be helpful to you. Not all of these filters are
advertised by Ten-Tec any more, as their newer radios have digital
controlled BFO frequencies allowing a smaller selection of filters to
perform all the functions.
Ten-Tec IF filter data:
Model Number / Stock Code / Bandwidth Hz / Center frequency MHz /
Poles/other notes
Following the number of poles are other numbers that have been reported
seen on these filters, or notes on the usage of these filters. The
numbers may be date codes or PCB design numbers.
216 / 48161 / 500 / 9.002210 / 6 RTTY filter
217 / 48036 / 500 / 9.000750 / 8
218 / 48037 / 1800 / 9.001500 / 8
219 / 48055 / 250 / 9.000750 / 6 / 8047 / 6840 "normal" note CW filter
(750 Hz from CW BFO frequency)
??? / 48057 / ??? / ???? / 4 / 84-05
220 / 48058 / 2400 / 9.001500 / 8 / 8307 / 6840
221 / 48243 / 250 / 9.000500 / 6 / Low note CW filter (500 Hz from CW
BFO frequency)
282 / 48054 / 250 / 6.299250 / 8
285 / 48053 / 500 / 6.299250 / 8
288 / 48075 / 1800 / 6.300000 / 8 / 9125 / N5
unk / 48127 / 6000 / 9 / AM filter in Paragons?
unk / 48074 / 2400 / 6.3 / Stock (non-option) 6.3 MHz filter
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