Because the transconductance values could be quite different, and you will end up with something entirely different than intended. Infineon looks quite different, so please don't use those, for this mod.
Success of the end result, relies on known measured values of the parts stated, if you use other parts you won't get the result. A lot of measurements were performed to find this combination.
If I were to get in more mosfets and measure them, I could possibly find other suitable combinations, but this combination is very good.
Success of the end result, relies on known measured values of the parts stated, if you use other parts you won't get the result. A lot of measurements were performed to find this combination.
If I were to get in more mosfets and measure them, I could possibly find other suitable combinations, but this combination is very good.
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By chance a FQPF20N06 (10S transconductance per datasheet) would do the trick?
I have plenty of them in stock
I would need to actually measure it at the operating bias points we are interested in.
Just use the parts I have suggested.
I understand that you want to use the parts you have. I can test these other parts later.
Just use the parts I have suggested.
I understand that you want to use the parts you have. I can test these other parts later.
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IRFP150 is not adequate, to be used with IRFP250, I have measured those already.
However IRFP150 Q2 and IRFP240 Q1 would work. Use 23 Ohms for R4. It won't have as good a damping factor as IXTH64N10L2/IRFP250 combination though. It will also be higher in distortion more like SIT3 sounding. Which may be preferable to some people.
Let me check some cheaper options. I will look at some potential candidates. I will check 044 to see if it is a possible candidate to test.
If you can be patient I can order some other cheaper parts in to see what other cheaper options will be equivalent. It could be 2 weeks though.
However IRFP150 Q2 and IRFP240 Q1 would work. Use 23 Ohms for R4. It won't have as good a damping factor as IXTH64N10L2/IRFP250 combination though. It will also be higher in distortion more like SIT3 sounding. Which may be preferable to some people.
Let me check some cheaper options. I will look at some potential candidates. I will check 044 to see if it is a possible candidate to test.
If you can be patient I can order some other cheaper parts in to see what other cheaper options will be equivalent. It could be 2 weeks though.
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Thanks a lot 2 Pico!!
yes take your time experiment all you need. I can wait several month
and i am sure that a cheaper version with IRF or FQP will be interesting for many people on this forum.
especially that the F6 transformer can be found cheaper with little perf degradation triad TY-250P 6€ at mouser
yes take your time experiment all you need. I can wait several month
and i am sure that a cheaper version with IRF or FQP will be interesting for many people on this forum.
especially that the F6 transformer can be found cheaper with little perf degradation triad TY-250P 6€ at mouser
The '44' I would be interested in is the FQH44N10. ;-)
However, I do have a few IXTH64N10L2/IRFP250 left over, so those work as well.
However, I do have a few IXTH64N10L2/IRFP250 left over, so those work as well.
IRFZ44PBF, is an uninsulated TO220 package, this is not the best choice.
I would much prefer testing either TO247, TO3P, or TO264 packages.
The transformer, power supply and chassis, is going to cost around $450, let's be a little bit sensible when trying to save money.
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