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mrf472 equivalent transistor needed

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neazoi

neazoi

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hello I need some modern equivalents for the mrf472 old transistor please
 

Hi,
I can't give an exact equivalent, but another popular RF transistor is D44C. Many people have used that instead of MRF72.

Hope this helps.
Tahmid.
 

Tahmid said:
Hi,
I can't give an exact equivalent, but another popular RF transistor is D44C. Many people have used that instead of MRF72.

Hope this helps.
Tahmid.
Click to expand...

How about the BD139? they are of the same physical size, although I know this does not matter. What is the power dissipation of the MRF72?
 

Tahmid said:
I'm not sure, but it's rated at 65V, 1A.

You mean, MRF472, right?

Tahmid.
Click to expand...

Yes.
I am making a small transmitter on it and I have used bd139. The output is only 800mW and the author of the circuit refers to an output of 2W if MRF472 is used. Thus I would like to find an equivalend of this transistor but I cannot even find a pdf datasheet of it.
 

but I cannot even find a pdf datasheet of it.
Click to expand...

Neither can I. I found the specs that I gave from a data book that I had, but there the max power dissipation was not listed.

Tahmid.
 

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