RG304 but get out your wallet, if you can find it! 0.28" od
http://www.awcwire.com/Part.aspx?partname=RG304
Also RG142 dbl silver braid is close to QRO all bands, same as RG303.
1900 volt max.
Grant KZ1W
On 7/31/2012 7:38 PM, K8RI wrote:
> The AV640 matching network is relatively simple, a current, or choke
> balun wound on 2 ferrite core, and I believe a 4:1 transformer wound on
> two cores.
>
> #31 material should work well with RG303 for the current balun, but it
> appears to be a bit anemic for handling the legal limit. I think the
> same core material will work for the 4:1 transformer.
>
> Is there another relatively compact/small coax that is rated for the
> full legal limit?
>
> 73
>
> Roger (K8RI)
>
>
>
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