matching N MOSFETs

[KD8CGH]

I just acquired a transistor tester board for my AD2. I am interested in matching IRFZ24Ns for use in an HF amplifier. The amp source is 12 volts and a single bias is adjusted for about a 200 mA draw for the pair.

I have run some basic sweeps to familiarize myself. I have 10 transistors on hand.

What would be the best measurement to use to match these devices for operation?

 

   Thanks

    Bob, KD8CGH

[korn]

interesting idea. Have you considered a mrf151g dual mosfet ?

There's a QEX article about a 300W 160-6m 300W amp using that mosfet....

Edited July 26, 2023 by korn

[KD8CGH]

korn

My question was about how to match N channel MOSFETs for an HF power amplifier. I need a pair of matched MOSFETs for amp. The AD2 can measure many things, the question is how can I use the Ad2 to select two matching transistors out of a set.

[korn]

On 8/11/2023 at 8:28 PM, KD8CGH said:

My question was about how to match N channel MOSFETs for an HF power amplifier. I need a pair of matched MOSFETs for amp. 

I spent many decades repairing equipment and even had access to a Huntron Tracker. That was great for repairs but I've never found a better way to match transistors for a new build than to buy a matched or complimentary pair in a single device.