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Class-A rf linear amplifier with BLW30

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arnab.bhaumik

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hi ,

i want to design a Class-A amplifier with BLW30 rf power transistor. please guide me. i want to use it with my bitx20 ham tranceiver. the final of the radio is with irf510. but i want to replace the irf510 mosfet with blw30. so the biasing will get changed.

attaching the datasheet of blw30 and bitx20 linear circuit. i know the blw30 is a old model . but here in kolkata/india, it is easily availeable in the local market.


arnab/vu2bpw
 

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IRF510 is a Power MOSFet but BLW30 is a BJT.They are not direct replacements.
Even if you re-design the bias circuit to get the right OP, MOS and BJT chararactics are so different.Re-design your Power Amplifier with your new transistor is much easier.
I'm sure there are app. notes for that frequency band,you may apply one of them..
 

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