[Elecraft] K3/Heath SB-200

[riese-k3djc at juno.com]

the output relay is driven/switched by a transistor should be little
current involved
the heath keys off the final bias supply ?? 130 volts and a fair amount
of current
I would always use an interface between a modern rig and any older amp
the ol heath amps are a fantastic deal with or without the harbach mods
I just completed mine with an upgrade for the fan  the soft start/key and
power upgrades are
well worth the price and the fun of installing
Harbach makes a good product and support 

Bob K3DJC



dnt b
On Tue, 04 Mar 2014 19:08:12 -0500 Don Wilhelm <w3fpr at embarqmail.com>
writes:
> Larry,
> 
> Why not measure the current.  Break the positive 12 volt Power 
> Supply 
> connection and insert your DMM set to measure current.  Then short 
> the 
> keying input line on the relay box.  You DMM will tell you how much 
> 
> current is being drawn.
>