Need help of Transistor Radio

[Rachel Anne289]

This is a transistor AM radio circuit is a clean and minimalistic design that faithfully amplifies radio signals so that you can hear them through a loudspeaker. I am using the MPSA13 transistor for this design because internally it is a Darlington and therefore has very high gain. At each stage, I am using very high-value self-biasing resistors to get the maximum out of each Darlington. The base junctions receive an extremely small amount of positive current so they self-center automatically.

The problem is: my local shop is almost out of MPSA13 transistors...

They recommend me IRF530 Transistor, I am not sure if I could buy it?
What is the difference? and can I replace the MPSA13 with the IRF530?
Here is the IRF530 Datasheet.

Thanks!

!

 

[General Lighting]

IRF530 is a large switching MOSFET (rather than a Darlington pair in a single package) which might not be the best substitute for this TRF receiver design (which appears to have been adapted from circuits used in the old valve days!), a KSP13BU (see link below) would be closer to the original component (and likely cheaper).

BTW you have ended up on a forum mostly about online streaming radio rather than a forum about analogue electronics (which would be more suited to queries like this), but I'm impressed anyone would still build one from scratch in the 21st century!

onsemi KSP13BU NPN Darlington Transistor, 500 mA 30 V HFE:5000, 3-Pin TO-92 | RS

uk.rs-online.com