I didn't check the power consumption, funny name for this device Regarding Vgs Threshold on the output devices: Q15-18. Vgs changes (<0.6 Volts to 2 Volts) with respect to VR2. Data sheets show a range of Vgs threshold (eg 1 to 3 Volts) values and if the correct output device is selected then VR2 has enough range to satisfy Vgs Th. This would explain why idle voltage didn’t increase on HUF75639P3, which has Vgs Th of 2-4 Volts. I had review because I fried an IRL2910 on my R amp board. unfortunately, they’re no longer available. Looking into alternates IRL540N, STP40N10L, and IRLB4030PBF. There are a few more I found on mouser that might work. Will likely go with IRL540N. Rds On is higher at 40mOhms but I don’t think that alone will cause any issues, or will it?
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Witam, proszę" nick Racja z USA " o udostępnienie plików schematów Destiny ze strony Hifiengine ponieważ nie można się zarejestrować na Hifiengine.Pozdrawiam
Cześć ,Piotr1111 powiedz do czego służą te podkładki silikonowe i czy te podkładki muszą być zamontowane czy można z nich zrezygnowaćNaprawiłem także mój wzmacniacz i uzyskałem bardzo dobry wynik z tranzystorami IRLB4030PFB. IRLB4030PFB ma próg Vgs od 1 do 2,5 V, podczas gdy HUF76639P3 ma próg od 1 do 3 V. Dźwięk znów jest piękny
Piotr
Hello, I am asking "nickname Racja z USA" to provide the Destiny schematic files from the Hifiengine website because you cannot register on Hifiengine. Regards
Hello, Piotr1111, tell me what these silicone pads are for and whether these pads must be installed or can they be omitted
English please
Hugo
Moderation team
Hello, Piotrek, I burned 76639p. After replacing the paste, I did not put on the silicone pads. Is this the reason for burning the transistors?I also repaired my amp and I got a very good result with IRLB4030PFB transistors. The IRLB4030PFB has Vgs threshold of 1 to 2,5 v whereas the HUF76639P3 has 1 to 3v. The sound is beautiful again
Peter
Hello, tell me what these silicone pads are for and whether these pads must be installed or can they be omitted
Hello, yes the pads are critical! They are an electric insulator to prevent shorting the huf76639 drain to ground. That is why your transistors burned.
The HUF76639P3 (TO-220 package) are no longer manufactured, out of stock at authorized distributers, and I doubt you can find an authentic set on the grey market.
I look for components on www.trustedparts.com that can't find at distributors like Digikey and Mouser.
I would recommend replacing all 8 transistors, and inspect components that may have been damaged by the event.
IRL540N and IRL2910 are substitutes I've used that work.
I haven't tried IRLB4030s because they were too expensive. As far as I know Peter1111 is the only user who reports that they will work.
Unfortunately, IRL2910 are also out of stock. I think I have a set of 8 IRL2910s (I have to check) I can mail you if you want.
I look for components on www.trustedparts.com that can't find at distributors like Digikey and Mouser.
I would recommend replacing all 8 transistors, and inspect components that may have been damaged by the event.
IRL540N and IRL2910 are substitutes I've used that work.
I haven't tried IRLB4030s because they were too expensive. As far as I know Peter1111 is the only user who reports that they will work.
Unfortunately, IRL2910 are also out of stock. I think I have a set of 8 IRL2910s (I have to check) I can mail you if you want.