magnum - transistors

[ForumEmailiusz]

Hi !


I just started building magnum detector but I can't find following transistors:


BC 184L


BC 214L


and a nightmare :-( BFX 29


What transistors I could use instead or at least maybe someone had some info about bfx 29 or other?

[Carl]

>Hi !


>I just started building magnum detector but I can't find following transistors:


>BC 184L


>BC 214L


>and a nightmare :-( BFX 29


>What transistors I could use instead or at least maybe someone had some info about bfx 29 or other?


The way these transistors are used in the circuit makes their types pretty non-critical. Things should work just fine if you use 2N3904's for the NPNs and 2N3906's for the PNPs. The BFX29 is the only one you might want to consider differently - if you're only driving headphones then the 2N3906 should be OK; if you're driving an 8 ohm speaker then you might want to use a TO-220 type PNP (like a TIP32).


Lets us know how it turns out!


- Carl

[mariusz]

Thanks !


I was thinking about BC 309 instead bc214 and bc 149 instead bc 184 but I'll try yours sugestion . As for now I've only done 1st PCB so you'll have to wait for a while for my opinion about Magnum ;-)


Mariusz

[Eric Foster]

Hi,


Check the pin-out of any alternative transistors you use. The BC***L series has the middle lead as collector.


Eric.

[mariusz]

>Hi,


>Check the pin-out of any alternative transistors you use. The BC***L series has the middle lead as collector.


but the ones that i had had middle pin as base, what about 2n series where's base, colector and emiter ?

[Carl]

>>Hi,


>>Check the pin-out of any alternative transistors you use. The BC***L series has the middle lead as collector.


>but the ones that i had had middle pin as base, what about 2n series where's base, colector and emiter ?


Eric's right, I didn't think of that. 2N390x has E-B-C pins with the flat side facing you.


- Carl