[Elecraft] K3: 630m amplifiers

[Tom Azlin W7SUA]

Hi Jim,

I do have much more modern handbooks. Current in fact.  :) Just 
remembered more Class C referenced in the older ones.

Will have to go read articles back then on key clicks and distortion. 
And continue to look at what amplifiers I could use on the two soon to 
be lowest bands.

73, tom w7sua

On 7/27/2015 5:13 PM, Jim Brown wrote:
> On Mon,7/27/2015 4:57 PM, Tom Azlin W7SUA wrote:
>> In all the old handbooks the discussion of amplifier design says (
>> page 76, 1941) "In amateur transmitters, and r.f. amplifier is
>> invariably operated Class C ( see Chaptr 3)." I though the final tuned
>> circuit was simply "pulsed" at the RF freq and then the output
>> filtering knocked off harmonics leaving a clean CW note.
>
> Yes and no. Yes, the tank of a class C amp is pulsed and the output
> network kills the harmonics. But it does NOT kill the intermodulation
> distortion that is produced by the non-linearity, and that intermod is
> heard as clicks.
>
> BTW -- you need a MUCH newer Handbook. :)
>
> 73, Jim K9YC