It is funny how short lived the memory is of this site. I broke IRFZ24N a few years before any else let alone them being used by most companies.
No I am not a genius well I am but not when it comes to electronics though! LOL
Yeticom out of NZ had a model of radio that was like so limited I think maybe less than 50 radio's made it out into the wild before the design was yanked. I am guessing that Yeticom was too much of a small fish to keep them in the game considering the rise at the time of Stryker in terms of volume. Anyways it used the IRFZ24N for it's finals and I mentioned it on this site when people where desperately looking for different non-rf mosfets.
If people had done anything with that information when I presented it YEARS AGO this would not even be a blip right now it would be old hat.
The problem with this site though is that for the most part most of the people that show up looking for answers are late to the game. They go with what is proven and tried and tested by other's and then when that is no longer practical they get caught with their pants down and are looking for the next sure thing!
I do not blame professionals with skin in the game for not wanting to show their cards it is not their problem. It is their kindness that helps people like me out since I am not electronically clever or well educated! I have gotten caught with my pants down though a few times now and I have learned. I do my research and I plan ahead or try too.
So if you for instance have 5 radio's and each one takes 1 or 2 or 3 or 4 IRF520's the time to get some is not tomorrow it is today. You really should purchase 2X the amount your radio's currently have in them unless your the type that seldom owns a radio more than 1-2 years. Pick up a sleeve of some 13N10's or IRF520's or what ever. They are so cheap if you never use them your out nothing really do not buy coffee at Starbucks for a few days and your purchase is covered!
Trust me on this the time to purchase these devices is not when you need them or you end up in the boat with people wanting 1969's, 1307's, 2312's, 477's tc.....I am that boat.
If you watch enough video's you will hear people talking about what to set the bias at for these devices current wise not voltage as well. Sometimes you have to be patient and watch an entire video instead of waiting to be spoon feed the info but it is out there but some times you have to listen to a lot of material and pay attention.
In many ways it is almost stupid maybe stupid is the wrong word a waste of time to attempt to find an exact match for a part as generic as non-rf mosfets. The time would be better spent either staying with a part you know or finding the next best part based on what you know about the parameters of the existing part.
All of these parts are garbage none of them can take any mis-match at any phase angle and survive. They are trash so you need to be ready for them to fail and have parts on hand. These parts are like common wear items on a car like a brake pad or a clutch they are not something like pistons or connecting rod's that normally last the life of the car if not abused. So you need to change your paradigm. I have a 45 year old Cobra 138XLR it is factory orignal right down to regulators, caps and transistors. You will never see that sort of durability out of current parts.
No magic parts yet and I doubt there will be. The only way this changes is if they actual put "RF" specific mosfets into the radio's!