On Thu, 17 Dec 1998 18:58:16 +0000 "Ian White, G3SEK"
<G3SEK@ifwtech.demon.co.uk> writes:
>
>Rich Measures wrote:
>
>>>and last ,i'm looking for a high power amp
>>>for 2 meter ssb ( 500 + out put) any body
>>>want to sell one?
>>
>>A pair of 4cx250Rs in parallel, self-contained, designed and built by
>
>>yours truly. 20db gain. Class AB1. About 1000pep watts out on SSB.
>
>>designed for10w pep drive. The built in 2200v power supply is not
>>suitable for FM, RTTY or A0. $100 plus ups. 120v/20a. Must be
>tuned up
>>with a keyer sending 50wpm dits, or with a tuning pulser.
>
>The gain is right - and by goodness the price is certainly right -
>but expect no more than 500W PEP of *linear* SSB. Otherwise expect to
>lose a lot of friends.
>
>No criticism of Rich's particular design; the limitation is in the
>tubes
>themselves.
I bit my tounge on that one Ian! I'll even push it to 600W but a KW SSB
is Lidsville on VHF from any pair of the 4CX250 series.
Now, if it was upgraded to Svetlana 4CX400A's 1200W is clean.
73 Carl KM1H
>
>73 from Ian G3SEK Editor, 'The VHF/UHF DX Book'
> 'In Practice' columnist for RadCom (RSGB)
> http://www.ifwtech.demon.co.uk/g3sek
>
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>
>
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