transistor equivalent

C

colinmarais

New Member

• Jun 15, 2008

• #1

I am building a small radio and need a MPF 102 FET transistor. Can anyone please indicate which of the following might work:
1. C945P1960
2. BC557A
3. TL 431 CLP 8343
4. E2 N2222 470
5. BF 199 CEB
6. 2N 3819
7. BC 547B V7 E
8. 2N 3904 H32

 

Hero999

Banned

• Jun 15, 2008

• #2

You tell us.

Look at the datasheets (these can be found using Google) and compare them to the MPF102.

Hint: you need an n-channel jugfet ,nothing elese will do, an NPN transistor won't work and neither will a voltage reference.

 

C

colinmarais

New Member

• Jun 16, 2008

• #3

Thanks. Will give feedback asap

 

Nigel Goodwin

Super Moderator

Most Helpful Member

• Jun 16, 2008

• #4

I'll give you a clue, the 2N3819 is the only FET in that list.

 

C

colinmarais

New Member

• Jun 16, 2008

• #5

tried it. the radio is as dead as a doornail. Then again, I am terrible in this. wil update if managed to get it right. Thanks everyone!

 

audioguru

Well-Known Member

Most Helpful Member

• Jun 16, 2008

• #6

The schematic for the Radio Shack Special regenerative "radio" that you are building shows that either an MPF102 or a 2N3819 FET can be used. An error in the parts list does not list the FET.

If you compare their datasheets then you will see that the pins are in a different sequence.

 

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