[Boatanchors] Receiver Antenna Input Question

[rbethman]

Yes, they don't do diddle for SS radios.

That is precisely why pallet loads of R-390As got shipped into the 
Middle East during Desert Storm.  The "new-fangled" solid state 
receivers had their front ends fried, and their filters clogged.  They, 
the R-390As, indeed DO have a large neon bulb in the antenna relay 
housing to discharge the static buildup from the antenna system.

Bob - N0DGN

Carl wrote:
> They found that out decades before Desert Storm. However a neon has a 
> rather long delay before it fires if it isnt biased to a more useful 
> voltage. SS front ends would be fried otherwise and I dont thing they 
> were using tubes in 1991. For SS there are better choices.
>
> Carl
>
>
> ----- Original Message ----- 
> From: "J Forster" <jfor at quik.com>
> To: "Carl" <km1h at jeremy.mv.com>
> Cc: <boatanchors at mailman.qth.net>
> Sent: Sunday, March 01, 2009 8:49 PM
> Subject: Re: [Boatanchors] Receiver Antenna Input Question
>
>
>   
>> Wind and dust can build up significant static. They found that out in 
>> Desert
>> Storm. Likely on planes too, from tiny water droplets.
>>
>> Hence the NE-2s.
>>
>> -John
>>
>>
>> Carl wrote:
>>
>>     
>>> By the time a NE2 fired at 90V the front end coils would be fried
>>> especially on the lower bands. The Navy used a neon bulb to protect
>>> front ends from TX antennas that were often only 50' away but it was
>>> biased so it fired at a much lower voltage. It was also much more 
>>> robust
>>> than a NE2.
>>>
>>> A neon will also bleed off lightning charge buildup from a nearby 
>>> strike
>>> or cloud to cloud discharges. With a Beverage antenna its not even
>>> local, Ive been bit by a strike several miles away.
>>>
>>> ARC-5 receivers had a NE2 or similar which was effective against the
>>> fairly low power of the matching TX.
>>>
>>> Carl
>>> KM1H
>>>       
>
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-- 
Bob - NØDGN