The following name/s have been given to me, please add feedback comments if you happen to use these repairers:

Phil Roberts (Christchurch):
03 381 2467 - general electronic work

Bob Fields (Dunedin):
03 476 3867 - guitar amps, valve work - need to check if he is still active.

DarkLantern blog - darklanternforowen.wordpress.com

Jul 26, 2019 15:25:25 GMT 12 Owen Y said:

The following name/s have been given to me, please add feedback comments if you happen to use these repairers:

Phil Roberts (Christchurch):
03 381 2467 - general electronic work

Bob Fields (Dunedin):
03 476 3867 - guitar amps, valve work - need to check if he is still active.

I've just had a very friendly and helpful conversation with Phil Roberts re my neighbours Roberts STA-50 that I'd repaired (one dud channel).

(Replaced blown output transistors, tracked further intermittency to oxidised legs on preamp IC, and oxidised contacts on some switches.)

I'd just wanted to know about the two adjustment pots per channel (DC balance and output stage bias), and he was immediately helpful.

So he's still available on that number. Thanks, Phil!