Just out of curiosity: how did Sony get away with such small heatsinks? Push-pull and not class A, but still seems like the TA-N88 chassis ought to double as a hibachi.
Thanks Ben. I even know what PWM means, but I guess Class D and VFET don't overlap in my brain's Venn diagram.
That will work. Keep in mind that "optimized" is often a matter of opinion. You should feel free to experiment with those ratios.
"VFET-less" Round 3 of the DIY Sony VFET is now available in the store:
https://diyaudiostore.com/collections/diy-sony-vfet
https://diyaudiostore.com/collections/diy-sony-vfet
- There are 75 pieces each of N and P channel VFET-less output stages now in stock with immediate shipping
- Should you miss out on the above, pre-orders for output stages are open for 2 weeks for as many as you like
- Mark Johnson's front ends Scourge, Bulwark, Marauder and Dreadnaught are in stock with immediate shipping
- VFET chassis are open for pre-order for 2 weeks
- If it is of interest, pre-orders for the new Monoblock chassis are open for 2 weeks, with UMS pattern
- 36V Meanwell power supplies, and binding posts suitable for the VFET chassis are in stock with immediate shipping
- You can also register your interest in a completion kit, register your interest in a PSU filter kit or register your interest in a front end
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@ Pop... Since these are designed with single die in mind, what would we change to go with say, N Channel 2SK28? I suppose I can look back at the first versions you did and extrapolate, but your input would be appreciated, since you designed them. 🙂
@Jason... Asked in the other thread, but is 1 a pair of boards or just 1 board, and what does, "parts kit" mean when you purchase it says, 1N channel parts kit."
JT
@Jason... Asked in the other thread, but is 1 a pair of boards or just 1 board, and what does, "parts kit" mean when you purchase it says, 1N channel parts kit."
JT
Is it only possible to pay for the kits with a credit card. I've tried with a debit card but it will not go through.
What is the difference in the bill of materials of N and P channels ?
In article I can't see any difference of components...exception for sure Vfet's are different
In article I can't see any difference of components...exception for sure Vfet's are different
You mean 2sk82? I think this was covered. In the schematic you see two power resistors in series with the Source pin. For the 2 die 2sk82 the resistor to ground is 0 or close to it. The R1 + R2 value is achieved by the resistor on the Source side, making the bias constant current.
R8 is at least one difference... but keep your sleuthing skills going. I looked at the schematic vs. BoMWhat is the difference in the bill of materials of N and P channels ?
In article I can't see any difference of components...exception for sure Vfet's are different
Definitely - It get's a bit more tricky when the schematics are slightly different. R5 (N channel) has roughly the same function as R6 (P channel) between the two circuits. Similar for R8 / R9. Now that you're looking at the schematics vs. the BoMs, you'll see it all. Either way, to order the parts from a supplier (or check your stash), the vast majority (or all parts except for the VFETs??) are the same for a full build as you've noted.R6 as well
