[Damon Hill[_2_]]

wrote in
ups.com:

Parts Sources for the Leach Amp

Transistors

4 4 MCM MJ15003 NPN 4.91 19.64
4 4 MCM MJ15004 PNP 4.91 19.64

OnSemi's MJ21193/94 also work perfectly well, and are available
from DigiKey and others at reasonable price. OnSemi makes a variety
of plastic cased power transistors that will also work reliably,
though probably best at slightly reduced rail voltages if the
amplifier will be working into low impedance loads. Consult
OnSemi's online parts guide to select and mind the pinouts when
wiring.


Alternates for the MJE15030 and MJE15031
2 2 ACK 2N6474 NPN 1.15 2.30
2 2 NEW 2N6476 PNP 1.32 2.64

Useful to know if I can't easily source the MJEs.

--Damon, building Leach amps since the late 70s.