[Elecraft] K3/Heath SB-200

[Don Wilhelm]

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.

A new K3 has a 1 amp rating on the 12 volt output.  Older K3s can be 
upgraded with the kit from Elecraft.

73,
Don W3FPR

On 3/4/2014 6:37 PM, Larry Boekeloo wrote:
> Hi everyone...
>
> Has anyone used a Yaesu FRB-757 Relay Box connected to a K3?  The FRB-757 requires 12 volts but there is no indication in the instructions if the FRB-757 draws more than .5 amps.  My Alpha 87a is going into the shop and I need my SB-200 as a backup.  I haven't had time to put the Harbach Softkey mods in the SB-200 yet.  Too much time playing with the K3!
>
> Thanks.
>
> Larry, KN8N
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