[AMPS] 3cx3000a7 versus 4cx15000

[zeitler@ibm.net]

Igor,
I have always felt that if the station I am calling can't be worked with at
least a solid kilowatt and a yagi then it was not meant to be worked by me.
Remember: this is AMATEUR radio. It is meant to be a hobby. It is meant to
be enjoyable. I know there is a station in Spain who is regularly on 20
meter SSB who runs multiple 6 element monobanders and 200 watts and he
sounds like foreign broadcast he is so loud. But he did the right thing and
invested his time and energy towards an outstanding antenna system.

Save your money, time, and headache with building the mega-amp. If you can
run the power based on your countries regulations that a pair of 3-500s or
4CX800s will deliver then go for that configuration. SB220s and available
for $450.00 U.S. and are easily converted to have 160 meters and full QSK.

Devote your time to improving your antenna. It will benefit you and your ham
fraternity.

Lane Zeitler
Kilo Mike Three Gulf/Six
San Diego, California
-----Original Message-----
From: igor rosky <irosky@yahoo.com>
To: amps@contesting.com <amps@contesting.com>
Date: Saturday, September 26, 1998 9:12 PM
Subject: [AMPS] 3cx3000a7 versus 4cx15000


>
>
>
>
>I read comments on the 3cx3000, i think it is a very good tube for the
>price, the reasoning behind my arguments is this
>
> 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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