[Elecraft] K2

[Don Wilhelm]

Tomy,

The K2/10 will have to be equipped with an amplifier keying circuit.
The keying circuits that have been publicized will handle a positive 
keying voltage.  Check the specs for the AL80B to see if the PTT voltage 
is positive or negative.
If it is negative, you will have to add a keying relay between the K2 
Amp Keying Circuit and the Amplifier.

If you already have the amplifier, you can check the PTT keying voltage 
with your DMM.  Connect the DMM to the PTT input of the amplifier - the 
DMM will show you the keying voltage and the polarity.  Then set the DMM 
to read current, and connect the leads between the amp PTT input and 
amplifier ground - the amp should key and the DMM should indicate the 
current required by the amp's PTT input.

Prepare your K2 amp keying circuit according to those measurements.

73,
Don W3FPR

On 10/2/2013 6:34 PM, Tomy wrote:
> Can  K2/10 be fed directly to an amplifier like the Ameritron AL 80B, without hurting it?
>   
>
> 73! Tomy Ivan KF7GC
>