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

[Ray Fantini]

Where do you suppose they found people qualified in how to tune a KWM-2, or how to interpret what frequency you're on or select the right crystal for the frequency segment you want?  Almost every HF radio built in the last thirty years is direct frequency entry with no tuning or any other such controls. Would assume everyone who has experience using such radios has retired long ago. Perhaps maybe in National Guard units or Reserve units?

Ray F/KA3EKH



-----Original Message-----
From: milsurplus-bounces at mailman.qth.net [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Peter Gottlieb
Sent: Tuesday, August 08, 2017 1:05 PM
To: George Babits <gbabits at custertel.net>
Cc: Milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] Fwd: Re: [ARC5] "What's Old is New..."

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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