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Old 7th Dec 2017, 7:52 pm   #18
Join Date: Jun 2015
Location: Biggin Hill, London, UK.
Posts: 3,307
Default Re: Matched Transistors

The EE1004 extension kit for the Philips Eletronic Engineer series contained a matched pair of AC132s (with heatsinks on the little PCBs used for transistors in those kits). If you damaged one you had to buy another pair from Philips.

Now that kit did contain projects for transformer coupled (driver and output transformers) push-pull amplifers. I do wonder how critical the matching was in a kit like that. Could you have 'got away' with just soldering any old AC132 onto the PCB?
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