[Motorola] P23AAM Help needed

[Tom B]

Hi Jack,

Glad to hear the someone else is interested in this old stuff.
The MN24 is a PNP.   I only have the H23-1 manual handy but it has the 
same part numbered transistor as your manual. The schematic show PNP.
This website gives the specs for the MN24 as:
http://alltransistors.com/transistor.php?transistor=41540

MN24 Transistor Datasheet. Parameters and Characteristics.
Type Designator: MN24
Material of transistor: Ge
Polarity: PNP
Maximum collector power dissipation (Pc), W: 45
Maximum collector-base voltage |Ucb|, V: 40
Maximum collector-emitter voltage |Uce|, V: 0
Maximum emitter-base voltage |Ueb|, V: 0
Maximum collector current |Ic max|, A: 3
Maksimalna temperatura (Tj), °C: 85
Transition frequency (ft), MHz: 0.3
Collector capacitance (Cc), pF:
Forward current transfer ratio (hFE), min: 20
Noise Figure, dB: -
Package of MN24 transistor: TO3
MN24 Equivalent Transistors 
<http://alltransistors.com/crsearch.php?mat=Ge&struct=PNP&pc=45&ucb=40&uce=0&ueb=0&ic=3&tj=85&ft=0.3&cc=&hfe=20&caps=TO3> 
- Cross-Reference Search

Tom Bryan
N3AJA


On 6/3/2015 4:21 PM, Jack Antonio wrote:
> So, I'm working on bringing a pair of H23AAMs back to life.
>
> And they appear to have power supply troubles.
>
> They have the NU-137-3 Nicad supply. I have the
> book for the Low Band radio, with the NU-137 and
> here is the problem, the two aren't not agreeing with
> each other.
>
> So a couple of questions.
>
> What is an MN24 transistor? NPN or PNP?
> The book shows PNP, the parts list says type XN12.
>
> Anyone have a later schematic than the 1956 version
> I have?
>
> The H/P23BAC book on the repeater-builders website shows
> a completely different power supply.