[Elecraft] K3: 630m amplifiers

[Phil Wheeler]

Clearly you are not among those who reminisce 
about the rotary spark gap, Alan :-)

73, Phil W7OX

On 7/27/15 1:53 PM, Alan wrote:
> The need for linear amplifiers with CW has been 
> known for many years. Quoting from the 1964 ARRL 
> Handbook:
>
>    When key clicks introduced by the addition of 
> an amplifier stage
>    are found only near the transmitter 
> frequency, amplifier "clipping"
>    is indicated.  It is quite common when fixed 
> bias is used on the
>    amplifier and the bias is well past the 
> "cut-off" value.
>
> [In other words, a class C amplifier.  Similar 
> to a bipolar transistor amplifier with no base 
> bias.]
>
>    A linear amplifier (Class AB1, AB2 or B) will 
> amplify the
>    excitation without adding any clicks, and if 
> clicks show up, a
>    low-frequency parasitic oscillation is 
> probably the reason.
>
> Alan N1AL