Perfect!
This is what the thread was intended to do, inspire people to look at what other people have found and use those tools to have the confidence to measure components on your own.
If you get stuck, by all means, post and ask.
-Chris
This is what the thread was intended to do, inspire people to look at what other people have found and use those tools to have the confidence to measure components on your own.
If you get stuck, by all means, post and ask.
-Chris
Dat sucks vriend.
Ik heb igbt,s binnen, 60 amps voor een las inverter.
I have igbt,s received, 60 amps for weld inverter, I do not now she real, but I have not yet problems with it .
Do not understand people do rip off because she drain the store intto the river.
Niet meer dan 10 kopen he, beter 10 leveranciers if you get my drift.
regards
kees
V pinch off varies with Idss.
A low Idss BL will have a low Vpinchoff.
A high Idss BL will have a high Vpinchoff.
Since BL varies from 6mA to 12mA (2:1) expect a similar range of Vpinchoff.
the 2sk170 datasheet shows typical Vgs off (0.1uA) of 700mV for 12mA Idss dropping to 550mV for 6mA Idss.
These being typical will have a tolerance.
I would expect at least 500mV to 750mV for the BL grade, but I have not measured many Vgs off, so I don't have reliable data.
But clearly your 500mVgsoff for a guide value for the BL grade is misleading.
I will first give the shop a chance to solve it (widerrufen), before I name and shame them 😉
It's a German shop who probably isn't aware they are fakes....
Yeah WalterW you have reason let's make life constructive
hope people learn from this lesson and bring us good semi's
after higher quality controls in near future 🙂 Greetings
ps. LSK jfets from DiyAudio store was like usual safe deal
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@ Keepsake
Probably equivalent of 2SD188 with complementary 2SA627
like old NEC's in 20 watts amplifier class A desiged by Jean Hiraga
The Class-A Amplifier Site - Hiraga 20W Class-A
Have a nice day 🙂
@ Keepsake10
Its my pleasure so you have in hands nos power transistors & rare
today . Hi-Rel company work for military industry today..
anyway not counterfaits to-3 imho real vintage.
DiyAudio store sell from time to time jfets for this amplifier
The Class-A Amplifier Site - Jean Hiraga Index
Have fun
Its my pleasure so you have in hands nos power transistors & rare
today . Hi-Rel company work for military industry today..
anyway not counterfaits to-3 imho real vintage.
DiyAudio store sell from time to time jfets for this amplifier
The Class-A Amplifier Site - Jean Hiraga Index
Have fun
They know that they selling fake.
I guess who is the supplier.
You must post his name to protect other guys.
Oops correction my pardon:
the jfets 2SK170|2SJ74 are for other 8 watt " Le Monstre"
Mr. Hiraga amp not for 20 watts " Le Classe A "
Let's back to the topic 😉
Kind tegards
Hi soundhappy,
The 8 watt Le Monstre looks quite interesting. I build until now some tube amplifiers, nevertheless I am not an "extremist" so transistors are an option as well. Actually I have some old fullrange speakers saved from Nordmende exquisite de luxe - one of the biggest and latest tube device made at Nordmende. This Nordmende had a tube amplifier with ell80 rated at about 8,5W per channel. Anyway, those speakers are really impresive - oval construction (about 33 cm / 24 cm) and might be an excellent candidate for Hiraga Le Monstre.
Is out there any safe source for the original transistors ?? at least all Jfets I could find on WWW looks like fakes.
The 8 watt Le Monstre looks quite interesting. I build until now some tube amplifiers, nevertheless I am not an "extremist" so transistors are an option as well. Actually I have some old fullrange speakers saved from Nordmende exquisite de luxe - one of the biggest and latest tube device made at Nordmende. This Nordmende had a tube amplifier with ell80 rated at about 8,5W per channel. Anyway, those speakers are really impresive - oval construction (about 33 cm / 24 cm) and might be an excellent candidate for Hiraga Le Monstre.
Is out there any safe source for the original transistors ?? at least all Jfets I could find on WWW looks like fakes.
Maybe you have to put MJ for the 150024
here
http://www.diyaudio.com/forums/soli...mp-mj150024-gain-problems-109-watts-only.html
There isn't any "MJ150024". It's only supposed to have one zero. One is marked with a different number and that doesn't correspond to any known MJ, even if you take out the extra zero.
Oke thanks for clarity. I did search fir you but I think these are special made, as this company do work for army.
this sucks you have to measure, what is difficult I think to find out amps and voltage.
I did use the mje 15024 for audio did well.
regards
kees
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