[Elecraft] KPA-1500 Efficiency As A Function of Input Power

[W2xj]

Actually a class C amplifier can be made to perform as a linear. The technology is over 60 years old but I don’t think it has ever been tried in amateur service. 

Sent from my iPad

> On Aug 17, 2018, at 3:06 PM, Bill Frantz <frantz at pwpconsult.com> wrote:
> 
> And I would guess it was running in class C, which is not linear, so only useful for certain modes (including FM). Class C can convert most of the input power to RF power.
> 
> 73 Bill AE6JV
> 
>> On 8/17/18 at 11:48 AM, k6dgw at foothill.net (Fred Jensen) wrote:
>> 
>> One 10 KW FM transmitter I helped build used four 4-1000A's in parallel and the filament power was 600 watts. Efficiency, including filament power was just over 70%.
> -----------------------------------------------------------------------
> Bill Frantz        | Ham radio contesting is a    | Periwinkle
> (408)356-8506      | contact sport.               | 16345 Englewood Ave
> www.pwpconsult.com |  - Ken Widelitz K6LA / VY2TT | Los Gatos, CA 95032
> 
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to w2xj at w2xj.net
>