[Boatanchors] Antenna Relays & T-R Switches

[Carl]

Probably because it cost money!

Military and marine radios could not be hampered by a fuse failure so 
they used a neon bulb biased to fire at some safe voltage level and save 
the front end.

The same concept is used on CATV cable amplifiers to minimize lightning 
caused voltage spikes from the pole mounted power supplies.,

Carl
KM1H


----- Original Message ----- 
From: "Mark K3MSB" <mark.k3msb at gmail.com>
To: "Peter Markavage" <manualman at juno.com>
Cc: <boatanchors at mailman.qth.net>
Sent: Wednesday, November 05, 2008 6:21 PM
Subject: Re: [Boatanchors] Antenna Relays & T-R Switches


> On Wed, Nov 5, 2008 at 5:49 PM, Peter Markavage <manualman at juno.com> 
> wrote:
>> "am I pumping some or all of my RF back into my receiver".
>
> 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?   I've considered doing that on my BA
> rx's as I restore them.
>
> Several years ago when I was working on my 5100B I had a pre-senior
> moment and used the TS-830S as a dummy load.....
>
> 73 Mark K3MSB
> _______________________________________________
>