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previous: Enzo Possibly, but I don't recall a -9V ... -- 2/19/2004 6:56 AM View Thread

Re: Lab Series L-5

2/20/2004 9:07 PM
Albert Kreuzer
Re: Lab Series L-5
You're right, Enzo, it was just a quick shot when I saw the number. In fact they used +/-15V for the preamp with zeners for stabilizing.  
So it's probably just a "house" number for a power transistor - can't find the L5 power amp schematic, seems I just repaired the reverb driver and power supply (made up my own schematics, more than 20 years ago). FWIW, the L3 uses TIP29 and TIP30 power transistors, as does the reverb driver of the L5. As far as I can see, there are no special parts involved anywhere, so any generic transistor of roughly the same power rating should do. Just find out if it is a npn or pnp...  
BTW, just re-read the first post, there is no mentioning of the size - maybe its a small signal transistor? Then substituting would be even easier.  
The only non-bipolar three-legged thing in there was a PF5102 JFET in the input stage. Everything else generic npn or pnp.