These power levels are not legal on Amateur Bands in the US, are they in
your country?
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Thank You! & 73, DavidC AA1FA
> a station runs an 8281 @ 20 kw he has the money!
> I am a dreaming little pistol wanting to get close and compete with
> this station
> The 3cx3000a7 for ecconomy and simplicity of construction delivers
> 7000watts with very little complication, without super high voltages,
> screen and grid supplies, grid neatralization circuits. Its is
> economically feasable. The big bun with 20kw will have 4.5db more
> signal with a huge complicated installation of power supply, blowers
> and extremely expensive components which cost thousands new, and
> rarely available surplus, or when available unreasonble for surplus
> parts.
> Hence the 3cx3000 is a tube that can deliver results that are very
> close 1.55db within reach of a 8171, and 4.55db within reach of 8281,
> since i believe in 10db increases for results, ie
> from 1000 to 10000
> 1500 to 15000
> 15000 to 150,000
> Since the last figure of 150,000 watts is impossible except for
> meglomaniac millionares, for the average person wanting to come close
> to these super amps, the 3cx3000a7 delivers, albeit with 400 watts
> drive. Also building a power supply can be achieved very simply with
> an existing plate transformer and doubler, most parts at the required
> voltage are more readily available. Secondly i think the 3000 new is
> bargain, the warranty is fantastic, it would be cheaper to build with
> a 3000 rather than multiple 4cx1600 or 8877s, and look at the grid
> dissapation, drive it with 100 and it will last a life time! I have
> access to many surplus russian 8281s hence i am building with what i
> have, if was in the states i think i would use the 3000.
>
> anyway just some thoughts
>
> Igor
>
>
>
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