WTB: Audio Precision System One - Generator board

[jsantoro]

Looking for one or more specifically the line transformer on it. I'd be interested in a transformer, a bad board etc. After troubleshooting my S1 I find the transformer is flakey. I lost half the balanced output and can get it back by messing with the transformer mechanically, rapping it etc.
Jim

[jonpaul]

Most likely impossible to get the board or transformers.

Ask old AP  guys like Bruce H or Rich C.

Suggest you carefully inspect the transformer, possibly a corroded termination of winding to pin or terminal.

Bon courage


Jon

[jsantoro]

Thanks. I did just that. Spoke with Duke A who was with AP. Told me about bad joints on the PCB and sure enough that was it.

[jonpaul]

BRAVO! The pins on bobbins of laminated  transformers take a lot of stress and are often poorly desgned or plated.

Thus a thru hole transformer has a mechanical effect on the solder joints.

The transformers themselves live forever......

Bon Chance


Jon