[Boatanchors] Antenna Relays & T-R Switches

[Bob Macklin]

Have you seen what a couple hundred watts of RF can do to a NE-2 or a pair
of clamp diodes. They will smoke for couple of milliseconds before your
input coils go up in flames!

Bob Macklin
K5MYJ
Kent (Seattle), Wa,
"Real Radios Glow in the Dark"

----- Original Message ----- 
From: "ROLYNN PRECHTL K7DFW" <k7dfw at clatskanie.com>
To: <boatanchors at mailman.qth.net>
Sent: Wednesday, November 05, 2008 3:35 PM
Subject: Re: [Boatanchors] Antenna Relays & T-R Switches


>
> > Which brings to mind a question I've wondered about..... why did the rx
> manufacturers of old never put a small fuse in the rx right after the
input
> jack, just in case?
>
>  ==============================
>
> Not necessary to add anything to the interior circuitry.
>
> Back in that era the common thing to do was connect a NE-2 across the
> external antenna terminals (that's what I did 50+ years ago) or if you
want
> to be modern, put back to back silicon diodes across the antenna
terminals.
> This applies to a rx with a terminal strip for the antenna connection.
>
>
> K7DFW
>
>
> ..._._
>
> _______________________________________________
>