ask
Well-known member
I've had an old (late 70ies?) mixer tucked away in the attic until now, it's a model 602 from the small company Ela Ljud Sweden AB – of which very litte information can be found online. It's very service friendly though, and to my pleasant surprise it has Sennheiser TM003 mic input transformers (1:15). The output transformers are marked ST-22, does anyone have a clue as to what they are?
Also, it's somewhat of an IC opamp exercise, though sadly mostly using AD301 ICs – slew rate limiting on a chip, as far as I can deduct... Could someone suggest IC upgrades, or point me to something in that direction? AD301 seems to have low current draw (2-3 mA) but with an external 35W PSU and just 15 301's total I'm guessing a more power hungry IC won't be a problem(?).
Also, it's somewhat of an IC opamp exercise, though sadly mostly using AD301 ICs – slew rate limiting on a chip, as far as I can deduct... Could someone suggest IC upgrades, or point me to something in that direction? AD301 seems to have low current draw (2-3 mA) but with an external 35W PSU and just 15 301's total I'm guessing a more power hungry IC won't be a problem(?).