Some info on the PSA-9 at URL:
http://www.qsl.net/kk4kf/hw9-mods.html#j

Also check BAMA (BoatAnchor Manual Archive) -- may be a schematic there
http://bama.sbc.edu/heath.htm

--
From one currently in the Cloaked Mode

Any clod can have the facts, but having opinions is an Art.
Charles McCabe (1856 - ), San Francisco Chronicle

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I have a new to me Heath QRP combo. The PSA-9 power supply has one
resistor in
it and it is fried. I would appreciate it if someone with a manual could
look
up the resistance/wattage of the resistor in the power supply