Hi Ronnie,

As others have already pointed out to you, most of the numbers that
you've posted are manufacturer's parts numbers, and not Motorola type
numbers. (Unregisted Motorola devices type generally begin with the
letter "M" except for some diodes.)

Checking in my 1966 Motorola Semiconductor Device Manual, the MA900 is
a high-voltage switch that is usually employed for driving neon
readouts, relays etc. The family is Germanium, PNP. The MA900 is not
specifically listed, but two other later member's of the MA 900 family
are. IIRC, the deviced listed in the book are the MA909 and MA910,
which likely have improved parameters over the original MA900.
Essentially a 75Volt devices with a current capacity of up to 200-Ma
capable of 150-mw.

The 2N1192 is also listed (2N192-2N1194) as PNP germanium transistors
for high-gain audio amplifier and switching use.

The book contains data sheets on both the above devices, which I would
be happy to scan and email to you if you want them. Can't be of any
help on the other devices.

Just let me know. My email address is , not the
address shown on the post which is intentionally obsolete to discourage
spammers.

73s, Harry C.

Ronnie wrote:

Hi,

Anybody have a library of transistor databooks
from the early 60's? I'm trying to find technical
info on the following devices:

Power Transistors:
Motorola 48S23 in TO3 Steel case

Signal Transistors:

Motorola 48S45 (624 date code or other marking)
Motorola MA900 (Sort of crossed to NTE 102A or ECG 102)
Mototola SM1824 (612 date code or other marking)
(one schematic I have shows this to be
a
PNP type)

2N1192 (Schematic shows as PNP type - one hit shows
as Germanium)
Motorola SM2140 (Schematic shows as PNP type)
GA987 (980425 date code or other marking)

I'm unsure about the manufacturer of the last device. All the other have
the Motorola circle M logo clearly marked, but it is not on that device.
The system these devices are in was manufactured in the fall of 1963
so it is likely that the deisgn is from the 1960 to 1962. I'd like to
browse
through a 1960 to 1963 Motorola data book. I'm suspecting all of these
to be PNP type Germanium devices, but that is just a guess.

Any help appreciated.

Ronnie, N5CSE



Ronnie,

I'm not trying to be an arse, but the "health and safety" part of me just
woke up...

What is the regs say about a homegrown repair of the autopilot or is it
classified as a non-essential unit or non-safety unit?

I assume the insurance companies would have a field day if you get a midair
flat tyre or decide to make an accidental or sudden parking...

-- Which might be the initial reason for Mitchell to use selected components
from Motorola...

I guess that the best way to get access to this info is to try to speak with
the supplier. Even if they been taken over, the airplane industry tend to
be paranoid on saving all data possible. Talk with the service engineers,
if they are more than 5 of them, you have good odds for one of them being a
ham!

Cheers


Dan / M0DFI