[Elecraft] K3: Added protection for RS-232 port (summary)

[hb9ari]

Ok Pete !

Have a nice day.

73, Rudolf

Pete Smith wrote:
> Glad you found it useful, Rudolph.  It will be important with this 
> unit that the chassis of your computer is well grounded to the same 
> reference point as the chassis of your transceiver, because Tripp Lite 
> says that the incoming pulse is diverted to ground through the cable 
> to the computer end.
>
> 73, Pete N4ZR
>
> The World Contest Station Database, updated daily at 
> www.conteststations.com
> The Reverse Beacon Network at http://reversebeacon.net, blog at 
> reversebeacon.blogspot.com,
> spots at telnet.reversebeacon.net, port 7000
>
>
> On 7/19/2010 5:02 PM, hb9ari wrote:
>> Pete,
>>
>> The "Tripp-Lite DB9" seems to be a good solution!
>> No work necessary inside the K3.
>> Will find a representative in Switzerland or do
>> a direct order.
>>
>> Thanks for valuable information!
>>
>> Best 73,
>>
>> Rudolf, HB9ARI
>>
>> Pete Smith wrote:
>>   
>>> Thanks to the Elecrafters who responded with a raft of good ideas.  
>>> That
>>> included W8JI, W4TV, K9YC, W9AC, N7MG, NN4X, KX4O, W3FPR, and AI4VZ
>>> (more or less in the order in which they responded.  I hope I have
>>> understood and can render all the input correctly
>>>
>>> Consensus seems to be that grounding, particularly making sure that all
>>> chassis are bonded together with the station entry panel and the
>>> powerline ground, is the best protection.  I think this likely is where
>>> I went wrong, because I had just completed the radio and had not yet
>>> grounded it to my station bus, which is 3/4" copper pipe behind the
>>> radios, wired to the station entry panel with heavy copper.  As I write
>>> this I'm in the midst of going through my station to make sure that
>>> everything is properly grounded.
>>>
>>> Several people provided ideas for component level protection, but W9AC
>>> found the Tripp-Lite DB9, which is a nicely packaged in-line protector
>>> that (they say) use "balanced arrays of high-speed avalanche diodes" to
>>> shunt the energy to ground.  At $20 including shipping (Newegg was the
>>> cheapest I found) it can't hurt.  I probably couldn't build it that
>>> cheaply, and it might help, particularly in combination with the
>>> grounding improvements.
>>>
>>>
>>>      
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>