[Milsurplus] Fwd: Re: [ARC5] "What's Old is New..."

[Peter Gottlieb]

The GRC-215 HF packset is designed to survive EMP and uses gas discharge tubes among other things. 


Peter

> On Aug 8, 2017, at 12:51 PM, George Babits <gbabits at custertel.net> wrote:
> 
> If you don't think dust during a dust storm carries a lot of static electricity, drive through a howling dust storm sometime with your AM radio on.  It is just like being on the receiving of a pending lightning strike. That's why I have one of those gas discharge lightning aresters ahead of my one HF solid state rig which is in my Land Rover.  Being a glow in the dark radio person I have no idea how the solid state rigs can be protected, but I would think theyre is a way.
> 
> 73,
> George
> W7HDL
> 
> 
> ----- Original Message ----- From: "Bruce Gentry" <ka2ivy at verizon.net>
> To: <Milsurplus at mailman.qth.net>
> Sent: Tuesday, August 08, 2017 10:13 AM
> Subject: [Milsurplus] Fwd: Re: [ARC5] "What's Old is New..."
> 
> 
>> 
>> 
>> What  solution was needed beyond an RF choke across the receiver input
>> and perhaps a couple clamping diodes on the gate of the first RF
>> amplifier?  Was the damage actually caused by static or in conjunction
>> with transmitters being operated nearby?
>> 
>>       Bruce Gentry KA2IVY
>> 
>> 
>>> On 8/8/17 11:06 AM, Glen Zook via Milsurplus wrote:
>>> The Harris SSB transceivers were having the receiver "front ends"
>>> damaged by the effect of sand blowing across the HF antennas.  Until a
>>> solution was found, quite a number of Collins KWM-2A transceivers were
>>> employed to replace the Harris equipment.
>>> 
>>> 
>>> Fortunately, there were around 100 KWM-2A transceivers stored in a
>>> warehouse and, again fortunately, someone remembered that these units
>>> were available.  A couple of retired Collins Radio Company employees
>>> were "drafted" to "check out" the equipment before it was airlifted to
>>> the Gulf States.  I have been led to believe that one of the former
>>> Collins employees went along with the equipment to insure that it
>>> worked after deployment and to teach the military personnel how to
>>> operate the KWM-2A units.
>>> 
>>> Glen, K9STH
>>> 
>>> Website: http://k9sth.net
>>> 
>>> 
>>> ------------------------------------------------------------------------
>>> *From:* Jay Coward via ARC5 <arc5 at mailman.qth.net>
>>> *To:* arc5 at ix.netcom.com; milsurplus at mailman.qth.net;
>>> arc5 at mailman.qth.net
>>> *Sent:* Tuesday, August 8, 2017 9:33 AM
>>> *Subject:* Re: [ARC5] "What's Old is New..."
>>> 
>>> Wasn't there a call for R-390A's during the Gulf War because comms
>>> were getting fried by high levels of atmospheric static discharge? Or
>>> is that urban or sub-urban legend?
>>> Jay KE6PPF
>>> 
>>> 
>>> 
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>> 
>> 
>> 
>> 
> 
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