For sale: Collins mechanical filters

[Mike Dinolfo]

I have two Collins mechanical filters for sale:

Filter #1:  Marked "526 9897 010 8204".  price $55.00 including shipping
CONUS.  I've been told by an "unconfirmed source" that this filter is
rated 455.00 khz, USB, 1.95 khz @ 3 db, 6.25 khz @ 60 db, 8 db insertion
loss.  A similar but slightly different description is provided in the
Surplus Sales of Nebraska catalog (#8), which indicates that it is "455
khz, 2.1 khz BW, 2.7 kohm in/out Z, 2.1 khz @ 3 db, 6.25 khz @ 60 db".

Filter #2:  Marked "526 9939 010 8212".  price $80.00 including shipping
CONUS.  According to the same Surplus Sales catalog, this filter is "2.1
khz, LSB, HF281".  My "unconfirmed source" indicates that this is a 455
khz center frequency unit.

Both filters appear to be NOS, never used.  The pins on the filters are
slightly bent (probably about 10 to 30 degrees or so) from handling, but
I can see no evidence of solder on the pins, so I'm assuming that the
filters have never been used.  The pins could be easily straightened
with a pair of pliers.  Because I have no way to test them, I'm selling
these filters "as is".  Both filters are sealed in physically identical
rectangular cases of light blue opaque plastic (or maybe it's epoxy?).
Each case is about 2.75" x .75" x .625".

If anyone is interested, please let me know via private email.

Thanks!

Mike Dinolfo N4MWP

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