Hi all,
As per subject, I'm looking to buy a pair of unused MAT02 transistors. A pair of MAT12 would do in a pinch, though I'd prefer not to mix and match (ie one of each). I'm based in the UK. Please send me a PM if you have any you're prepared to part with!
Thanks,
Andy
Like others have said, the MAT02 is unfortunately long obsolete and unavailable.
Also the LM394
It's a bit risky to buy on the web, because you can get some fake ones, I've got some fake ones some years ago. So always be careful when you see MAT02 for sale.
If the MAT12 is a dual, low noise, super-matched transistor pair, and it's readily available then go for that one. I don't know the other alternatives that exist at the moment.
Another solution that I've done that works great is to buy a pack of 30 or 40 units of BC550C transistors, measure all of them and match HFE (curve tracing with Peak DCA is even better), when you get pairs that match very very closely then you use those 2 and glue them together. You can eve put some metal or aluminum/copper foil around them.
BC550C is low noise like the MAT02
The measuring and selection makes them matched
And having them glued and foil around them will make them always at the same temperature level.
You then have your own DIY MAT02
Good Luck mate