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

[hb9ari]

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.
>
>