[TowerTalk] homebrew low voltage surge suppressors?

Dick Green WC1M wc1m at msn.com
Wed Sep 27 11:02:46 EDT 2006


No, I'll need 24 of them -- one at each end, tower and shack. 

> -----Original Message-----
> From: Keith Dutson [mailto:kdutson at sbcglobal.net] 
> Sent: Wednesday, September 27, 2006 10:54 AM
> To: 'Tower'
> Subject: Re: [TowerTalk] homebrew low voltage surge suppressors?
> 
> WOW, they certainly have gone up in price! The RCT is now $99 
> at AES.  But you will need 12 of the 8 wire RCTs, so that is 
> $1200.  Let us know if you find a cheaper alternative. Thanks.
> 
> 73, Keith NM5G
> 
> -----Original Message-----
> From: towertalk-bounces at contesting.com
> [mailto:towertalk-bounces at contesting.com] On Behalf Of Dick Green WC1M
> Sent: Wednesday, September 27, 2006 9:36 AM
> To: Tower
> Subject: [TowerTalk] homebrew low voltage surge suppressors?
> 
> My new tower will have three 4-el SteppIRs, three TIC rings, 
> a T2X, a stack match and an SO2R switch box. That comes to 96 
> control wires. Since the tower is over 200 feet from the 
> shack, it's best to have a surge suppressor at both ends of 
> each wire. I used Polyphaser RCT surge suppressors for my 
> other tower, but the price has about doubled since I did 
> that. I'm looking at close to $3,000 worth of RCT surge 
> suppressors. Besides, the RCT mounting hardware is really 
> designed to clamp to a tower leg and I'll be mounting the 
> suppressors on ground panels inside metal NEMA boxes. I've 
> done that before and wasn't real happy with the result. Even 
> if I go with the ICE units, which have better mounting, the 
> cost will be quite high. 
>  
> So, I'm wondering if anyone has seen or designed a homebrew 
> low voltage surge suppressor circuit? My understanding is 
> that it takes more than just low voltage MOVs. You need 
> series inductance and/or resistance and a diode.
> I haven't found anything appropriate on the web. Can someone 
> point me to a schematic and/or tell me how they did it?
>  
> 73, Dick WC1M
>  
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