HA-PRO2 with broken potentiometer

oisteink

Member
2014-05-09 7:09 pm
Hello


I'm on my very first hifi project so I know nothing about anything. I'm trying to educate myself as I move along though.


I bought a pre-soldered HA-PRO2 v4 but when it arrived the potentiometer was broken. It looked like it had gotten a rough trip in the mail and was heavily skewed, with some bits coming out of the rear hole.


I bought a new one from a local supplier here in Norway that looks just like it, and also ordered one from Mouser. The one from mouser was an Alps RK271 and I bought the 100k version as I thought it was listed as total resistance adding the two channels together. My bad.


My question is - can I still use it? From what I read they both do the same job but the 100k one takes less load to run.


Also - the transformator i bought is listed as 220v/50hz 12-0-12, but when I measure it I get about 14v. Can this be as Norway have 230v/50hz, or just because there was no load on it when I measured it? I see that it's stated in a thread here that running anything over 12v will ruin the board.
 

oisteink

Member
2014-05-09 7:09 pm
Photo

Photo of the potentiometers and the transformer
 

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