[TowerTalk] Wireman Balun kits

[Roger (K8RI)]

Jim Brown wrote:
>  On Wed, 05 Mar 2008 23:09:58 -0500, Roger (K8RI) wrote:
>
>   
>> I've been looking at the series 830, 831 an 832 balun kits from the 
>> wireman.  These use T-200-1 and T-200-2 cores.  Would a balun like these 
>> be capable of handling the full 75/80 meter band with the legal limit 
>> CCS (Digital). I figure the SWR could reach between 3 and 4:1. 
>>     
>
> Your time would be far better spent studying my work on common mode 
> chokes. 
>
> http://audiosystemsgroup.com/RFI-Ham.pdf
>
> and 
>
> http://audiosystemsgroup.com/NCDXACoaxChokesPPT.pdf
>
> The Wireman's "balun kit" is a VERY weak common mode choke balun. In 
>   
I don't plan on using a choke balun.  What I'm planning on winding is a 
1:1 balun where both sides of the antenna are at aDC ground although I 
may put a choke back near the remote antenna switch.

73

Roger (K8RI)

> other words, it isn't worth the powder to blow it to you know where. Same 
> for the Amidon and Palomar stuff. A real ripoff. 
>
> The ONLY commercial baluns worth the money are the big ones that DX 
> Engineering makes. Not only do they "handle power," they also provide 
> excellent choking action. But they aren't cheap -- about $130. But you 
> can build your own that is as good as the DXE for under $30. My tutorial 
> tells you how. 
>
> As to power handling -- it has NOTHING to do with SWR, but depends only 
> on the UNBALANCE of the antenna and the impedance of the choke. 
>   
I've found the voltage gets high enough apparently due to SWR that it  
arcs and that can be a problem.
> 73,
>
> Jim Brown K9YC 
>
>
>
>
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