[TowerTalk] MOW - gas discharge tubes

[jimlux]

HansLG at aol.com wrote:
> MOV-s are useless at these frequencies. They can't even be used for  
> protection of phone lines.
>  
> Gas arrestors have the low capacitance you are looking for. If you check  
> out a surge protector for phone lines you find gas tubes together with small  
> fuses.
>  
> Hans - N2JFS
>  

for low voltages, they also have 4 layer diode type devices, if you want 
a semiconductor device. they're available in multiples in SMD packages, 
so they're popular for protecting signals coming over a multiconductor 
connector.

Can't handle a huge amount of energy, but they can keep from cooking a 
sensitive IC with relatively low transient energy.


>  
>  
> I would think the gas tube would be ok, low shunt C and all that, but  the
> MOV would likely be bad. I use dual-element gas tubes across the line  on
> both ends of my bi-directional Beverages, and although I have never done  a
> before/after test, I do seem to have "normal" Beverage  directivity.
> 
> 73,
> geo - n4ua
> 
> _______________________________________________
> 
> 
> 
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>