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Old 15th Oct 2018, 2:52 am   #13
Maarten
Dekatron
 
Join Date: Dec 2007
Location: Haarlem, Netherlands
Posts: 4,184
Default Re: Mystery PA with Sanken transistors

Thank you! For future reference: the amplifier board is marked PK-30A. The mixer board has printed on resistors. I think either JVC, Sharp or Pioneer used that technology but it may have been common for certain Japanese equipment of that era. 1979 seems a bit late but not too far out of range, but to confirm are there any date/batch codes on the Sanken transistors? Normally, semiconductors are a good indicator with a margin of roughly a year.

Also, aren't there any markings on the transformers? I think I see something on the side of one. Such markings might be useful in finding out in which brands they're also used.

Last edited by Maarten; 15th Oct 2018 at 2:58 am.
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