[Heath] Soft Key and Soft Start Mods to HA-14 and HP 24

[Bill Bear]

I have successfully made these modifications to my SB200, however, the schematics for the HA-14/HP-24 are slightly different and there is a revised “universal” soft start version that I think is better to use on this 110 VAC wired power supply.

Although the Harbach mods I used before were very self explanatory, they did not provide a wiring diagram, just text instructions of what wires to cut and terminals/connetions to solder.

Below are two modified schematics of the HA-14 and the HP-24 that show how I plan to wire in these circuit boards.  Reviewing the recent posts on this forum I know there are more experienced hams than I am with these modifications and am looking for advice.    

I believe I have scoped out the wiring for the Soft Key, but not sure about the Soft Start module.  I plan to use the “universal” Soft Start Module 100 Version 3.0 where only one side of the 110 VAC service is switched.  I would appreciate any comments or suggestions.

Bill Bear  KL7YB

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