[Collins] Mech filters in 75A3 - update - 75A1

[Al Parker]

Well folks,
    This has spurred some interest, so I got the pamphlet & read a little.
It's titled, "Mechanical Filter Plug-in Adapters"
    it's a Collins paper, for the 353C-14 & 353C-31, factory plug-ins, one
for CW (1.4kc), 1 for fone (3.1kc)  Gives installation, operating & maint.
instructions, incl parts list & skem.  7 pgs total, not incl covers & table
of contents, disclaimers, etc.
    it is for the 75A1, with no mods to the rcvr.
    On page 1 it clearly states, underlined:
"The 353C Adapter will not work in any other receiver."  don't ask me why
not
    uses a 6BA6 to drive an FL201 filter, followed by a 6AU6

I'll get it scanned in the next cupla days & send it to whoever asks.
73,
Al, W8UT
New Bern, NC
BoatAnchors appreciated here
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And remember; "-They don�t make tubes nowadays like they used to..."

----- Original Message -----
From: "Al Parker" <anchor@ec.rr.com>
> Hi all,
>     I discovered today that I have an original Collins mod that shows
this
> 2-tube plug-in.  I think it's titled "Filter for 75A1" or similar (don't
hv
> it in front of me now).
>     If there's interest, I'll scan & send to anyone, or get it on my
> website if too many requests.
> 73,
> Al, W8UT