The db 4032 cavity filters are 66 inches long and 14 inches around, I
have a 4 pak of them and they work well for a tube pa but not enough
isolation for a transistor final. The loops are 12 inches long and there
are 2 used in the same upper end of the cavity filter, I guess that will
give you a stating point.
dave_g7uzn wrote:
>
> Hi All, You will be pleased to hear that I have scrapped the idea of
> using carbon dioxide bottles for the 6M cavities and have instead
> been put in touch with a local ham that used to own an engineering
> workshop who is willing to help by supplying 6" or 8" ali tubing.
>
> The problem is that I can't find any designs for the filters to work
> on 50/51MHz .....i.e. tube lengh, loop lengh etc. Can anyone please
> point me in the right direction to a Web site or supply any
> design/dimensions please ?
>
> Any help appreciated.....Cheers Dave G7UZN London
>
--
73...Clark Beckman N8PZD
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