[Elecraft] Questions from a Possible Builder/Owner

[Vic Rosenthal]

Jim Harris wrote:

> 1.  How does the K2/100 key an RF amplifier (AL-811)? 
> I have a Heil footswitch with a second cable for
> amplifier keying.  But, would prefer to use keying
> from the rig itself.

It has a built-in transistor switch that will switch +200V at 1A.  It goes low 
at least 15ms before the RF starts flowing and has an adjustable hold time.

> 2.  How is ALC sent from my RF amplifier back to the
> K2/100?  I've reviewed the K2/100 manuals and cannot
> find how it is done.  Maybe it really isn't needed.

Amplifier ALC isn't supported.  My feeling is that it isn't needed, especially 
in view of the K2's closed-loop power control system.

> 3.  How do I adapt my Heil Headset Pro and Goldline
> microphones.  They currently are used with an
> IC-746pro by using a Heil adapter cable.  They now go
> thru a homebrew switchbox with the adapter cable
> between the rig and switchbox.

Sorry, I'm a CW operator!  But lots of guys are using them.

> I cannot see any other major problems.  I've wound
> baluns and view winding toroids a bit tedious but
> there is nothing like "rolling your own."  My
> background includes professional soldering training
> and experience.  I have a scope, DVM and other minor
> pieces of test equipment. Am I over looking any major
> areas that need to be covered before starting?

Nope, just follow the instructions carefully and don't work when you haven't 
slept for the past couple of days and you will do fine.  And if you have a 
problem, there's plenty of experienced help available.

-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco