[R-390] 500 khz filter

[Todd, KA1KAQ]

Hey there Bill -

Hope you are doing well.

Here's a filter suggestion. Can't recall which piece of equipment it was
used in but Collins used a 500 Khz filter in one of their aviation sets.
It's a nice 10 Khz wide for more HiFi listening.

Filter number is F500E-94 if I remember correctly. They show up on ebay
from time to time in the $25-$50 range. I think you have to clip off a pin
or threaded stud but otherwise it's a direct drop in, same style. I use one
in position 3 for my J4 with the 6 Khz in position 2.

On Sat, Dec 7, 2019 at 1:18 PM B Riches via R-390 <r-390 at mailman.qth.net>
wrote:

> I am looking for a 500 khz, 6 khz or so filter for my 51J4 receiver.  It
> does not have to be plug and play.
> 73,
> Bill, WA2DVUCape May, NJ
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