Heath Parts ID

[Radioham]

Fellow Heath Gurus-

I need some help.  I am trying to put a new, unused, almost built HW-9 on
the air and am in the alignment and troubleshooting stage.  I may have to
swap out some parts which were defective (I guess Heath won't send me subs
anymore :-() or damaged during installation.  Unfortunately, I don't
recognize some of the P/Ns as being readily available and wonder if anyone
knows of a site or has info on what is available today in the way of
substitutes.  As an example, I may need a BA-244 diode and a MPAS20
transistor.  The replacement chart in the manual does not note any subs for
these.  These are not your garden variety 1Nxxxx or 2Nxxxx or are they??

Hopefully I will be able to debug this rig and get it on the air soon.  If
I have more problems, I will be back to well of knowledge.

Thanks in advance.

73,

Steve, N4EUK
Reston, VA