Hi Mike,
Here is a list of Ten-Tec filter model numbers and stock numbers.
Unfortunately it does not exactly answer your question, but it may be more
information than you had previously:
*Ten-Tec IF filter data*
>
>* Model Number / Stock Code / Bandwidth Hz / Center frequency MHz / Poles*
>
>* 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*
>* ??? / 48057 /?/?/4/Guess Corsair 2.4 kHz stock filter unconfirmed*
>* 220 / 48058 / 2400 / 9.001500 / 8 /8307 / 6840 Omni stock filter?*
>* 221 / 48243 / 250 / 9.000500 / 6 Low note CW filter*
>* 282 / 48054 / 250 / 6.299250 / 6*
>* 285 / 48053 / 500 / 6.299250 / 6*
>* 288 / 48075 / 1800 / 6.300000 / 8 / 9125 / N5*
>* unk / 48127 / 6000 / 9 / ? / Paragon AM filter??*
>* unk / 48074 / 2400 / 6.3 / Stock (non-option) 6.3 MHz filter>*
>
>
>
>* DE N6KB*
>
On Wed, Jun 24, 2020 at 9:19 AM Michael Tortorella via TenTec <
tentec@contesting.com> wrote:
> Hi all, does anyone know what the 48057 filter is? It has 4 crystals and
> one
> of them is stamped "48057" on the top but there is no other ID anywhere on
> the board (physical design is the same as 288, 285, 216, etc.) Thanks for
> any help and 73, Mike W2IY
>
>
>
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