[Milsurplus] Unknown "DF" Mechanical Filter

[Dave Merrill]

'DF' is most likely Dittmore-Friemuth.

On Sat, Feb 15, 2020, 11:35 PM Hubert Miller <Kargo_cult at msn.com> wrote:

> Anyone here know about a mechanical filter, blue color finish, 2 screw
> mounting with 3 pins at each end, similar size to small Collins,
>
> with "DF" logo in circle, and this number on it:  No internet info found !
>
>
>
> TYPE D.F-455-U-2.3-H      ( may be DF or D.F. )
>
> P/N  7232-528-3
>
>
>
> After today's hamfest, I decided I should hamfest at my storage, and I
> found this and 2 new boxed Collins 455 2.1 filters. Hmmm…..
>
> I had no idea I owned these!
>
> thanks-
>
> Hue Miller
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