Chosen Solution
I have a vintage Sherwood receiver and I need to replace a few components. I don’t want to pay $20 for the hand drawn schematics , I know what needs to be replaced I just cant find any info on the components. both are three terminal One labeled MSPS 4199 (some kind of transistor?) One is labeled S2103 Pictures attached
Aaron it will help if you can tell us the exact model of your receiver. The MSPS4199 is actually a Motorola SPS4199 and an equivalent for that would be a 2N4401 NPN Transistor - NTE123AP As for the other component, a view of the complete PCB may help us further. It appears as it has been manufactured by Fairchild Update (03/13/2019) Okay now we know this is reference designator Q205 (identical to Q305) and we know it is a Fairchild S2103 NPN transistor. I do not yet have a vintage catalog from Fairchild to find an equivalent, but have the schematic with the voltage on BCE of the transistor
The MSPS 4199 is a transistor. The other I think is another transistor but I’m not entirely sure.
