MRF4427 help!

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XXL
proppa neck!
proppa neck!
Posts: 537
Joined: Mon Sep 02, 2019 11:06 am

MRF4427 help!

Post by XXL » Mon Dec 26, 2022 2:21 pm

Just looking at swapping out the old 4427 metal can to a newer mrf4427. Is it just a case of redesigning the pcb to fit the mrf4427 and hook it up to the correct wires/tracks ?

The pinout for the mrf4427 is as follows:

Pin 1 Emitter
Pin 2 Collector
Pin 3 Collector
Pin 4 Emitter
Pin 5 Emitter
Pin 6 Base
Pin 7 Base
Pin8 Emitter

Does this mean I just need to hook up to any one of the pins or do I need to use all of them. For example would I need only pin 8 for the emitter or would I need pin 1,4,5 & 8 for it to work ?

jvok
no manz can test innit
no manz can test innit
Posts: 220
Joined: Sun Aug 16, 2020 2:44 pm

Re: MRF4427 help!

Post by jvok » Mon Dec 26, 2022 4:42 pm

You need to connect all the pins

XXL
proppa neck!
proppa neck!
Posts: 537
Joined: Mon Sep 02, 2019 11:06 am

Re: MRF4427 help!

Post by XXL » Mon Dec 26, 2022 5:12 pm

Is there anything else that needs changing when going from 2n4427 to a mrf4427 ?

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