SM3MXR wrote:
>
> Hi all
> I have a half built 2m 2x4cx250 project on the bench.
> It is a strip line type, like the ARCOS 2x4cx250 amplifier I've been
> using
> for many years, with some differences.
> It is built many years ago (>20?) by a local ham, but he remember
>almost nothing about it.
> Most of it is built with fiber glass circuit board
>and the main differences from
> the ARCOS are:
> 1. This one uses receiving type sockets with a home-brew screen
>capacitor
> made from fiber glass circuit board. (Contact springs around the
>tube screen ring)
> 2. The strip line isn't as wide (100 mm) as in
>the ARCOS so the tubes sits closer together.
> Strip line length is 250 mm.
> 3. The chimney is like a box around both tubes,
>made of glass fiber circuit board
> with most of the copper taken away.
> 4. Air is blown into the cathode compartment
> Is there anyone on this list who knows if this
>is a known/published design?
I've tried to find out about as many 4CX250 VHF amp designs as
possible... but this is a new one.
--
73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB)
Editor, 'The VHF/UHF DX Book'
http://www.ifwtech.co.uk/g3sek
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