>
>measures wrote:
>
>> I ran a pair of paralled 4cx250Rs on 2m SSB. The tank was 1/4 wave.
>> With a screen current of c. 5mA (@400screen-v), the linearity was good.
>> Output was c.900w PEP on SSB. 10w drove it.
>>
>> cheers
>>
>> - Rich..., 805.386.3734, www.vcnet.com/measures.
>
>I think in these arguments (anf it seems to have developed into that),
>it is essential to define what 'good' is.
Good means no splatter complaints from nearby staions.
>It's a bit pointless saying
>900 W at good linearity, without defining what 'good' is. Does 'good'
>mean that it did not sound distorted at the other end, or that the 3rd
>order products were more than x dB down ?
>
none of the above
>Without 'good' being defined, there is little point is arguing about
>whether a single 4CX250B can produce 250, 300, 450 or even 1 kW. I took
>a data sheet figure of 300 W, but clearly there is some tradoffs between
>power/linearity/tube life/voiding tube warrenty/and a whole host of
>other things.
>
>--
>Dr. David Kirkby Ph.D,
>email: drkirkby@ntlworld.com
>former email address: davek@medphys.ucl.ac.uk
>web page: http://www.david-kirkby.co.uk
>Amateur radio callsign: G8WRB
>
>--
>FAQ on WWW: http://www.contesting.com/FAQ/amps
>Submissions: amps@contesting.com
>Administrative requests: amps-REQUEST@contesting.com
>Problems: owner-amps@contesting.com
>
>
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
--
FAQ on WWW: http://www.contesting.com/FAQ/amps
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
|