[Milsurplus] correction - - -416Bs and cavities

Thu, 25 Apr 2002 20:43:12 -0700

we would like to buy this to add to  the museum here in Arizona.

see www.smecc.org for details about us.

we have some of the notes of the bell folk that helped develop this system
on file would be a neat  display.
ed sharpe archivist for smecc
----- Original Message -----
From: "Mike Feher" <[email protected]>
To: <[email protected]>; "aGEnuine ham" <[email protected]>
Cc: <[email protected]>
Sent: Thursday, April 25, 2002 5:43 PM
Subject: Re: [Milsurplus] correction - - -416Bs and cavities

> Can someone answer the guy's question or not? We all know what a 416B is.
> That was not the question. What does he have, was the question. I do not
> know, and I was using 416s 40 years ago. 73 - Mike
>
>
>
> Mike B. Feher, N4FS
> 89 Arnold Blvd.
> Howell NJ, 07731
> (732) 901-9193
>
>
> ----- Original Message -----
> From: "aGEnuine ham" <[email protected]>
> To: <[email protected]>
> Cc: <[email protected]>
> Sent: Thursday, April 25, 2002 8:21 PM
> Subject: Re: [Milsurplus] correction - - -416Bs and cavities
>
>
> > Jack:
> >
> > Back before microwave solid state became a reality, the best receiver
you
> > could build and keep operating in a commercial circuit was a low noise
> > diode mixer followed by the best gol-danged IF you could manage.  WE did
> > that for the first TD-2 microwave by using the 416Bs in the wideband IF,
> > and used the same approach in much of the microwave (& radar) gear they
> > built in the 50s.  As H. O. says, the tubes were much sought after for
> > ham VHF and UHF front ends, and even Nems-Clark used one in a tunable
V/U
> > receiver of the time.  Garden variety FETS beat them hands down now, but
> > at the time they were prized possessions by the lucky few who could
trade
> > for them from a telco friend, or were among the top scroungers in MARS.
> > One reason so many disappeared is they have a significant amount of
> > recoverable gold plating which made the gold bugs grab them up faster
> > than hams.  Spec's appear in many publications of the 50s, including
ARRL
> > handbooks, CQ and QST, and probably in the new Tube Lore book devoted to
> > post '47 WE tubes.
> >
> > George,
> > W5VPQ
> >
> > ________________________________________________________________
> > GET INTERNET ACCESS FROM JUNO!
> > Juno offers FREE or PREMIUM Internet access for less!
> > Join Juno today!  For your FREE software, visit:
> > http://dl.www.juno.com/get/web/.
> > _______________________________________________
> > Milsurplus mailing list
> > [email protected]
> > http://mailman.qth.net/mailman/listinfo/milsurplus
> >
>
> _______________________________________________
> Milsurplus mailing list
> [email protected]
> http://mailman.qth.net/mailman/listinfo/milsurplus
>