| Alpha / Delta ATT3G50DIN/HP is one such device, however they appear to 
be out of production. 
The only other comparable product that I am aware of is the Hofi Model 
7756 
http://arraysolutions.com/shop/index.php?route=product/product&product_id=222 
Martin
W2RWJ
On 8/5/2015 11:06 PM, Grant Saviers wrote:
 
I'm wondering what commercial practice is re surge arrestors?
I note the max power ratings for DIN connector arrestors is 250 watts 
at least at Tessco.  Many are frequency selective. PolyPhasers claim 
2500 watts 1.5MHz to UHF. 
With top and bottom tower bonding to a ground rod grid and 125' to 
tower in a trench with the shack entry plate feedthrough grounded to a 
200' perimeter footing Ufer, to center pin arrestors do anything useful? 
Tower and trench coax is all DIN terminated hardline, so it would make 
sense to connect to a DIN connector arrestor (if useful), but no such 
QRO animal seems to exist. 
Grant KZ1W
 
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