Hey Dan, I might have but not sure if its V3 will send you DM with the pics.
Hello, I see that many of you have tried different options for terminal transistors, but has anyone tried vertical mosfets - for example ECW20N20 and ECW20P20?
My opinion is that with these transistors the amplifier sounds best. Still, I would be interested to hear your opinion.
My opinion is that with these transistors the amplifier sounds best. Still, I would be interested to hear your opinion.
Those are lateral as well, but they are, as far as I know, S types , like the original Hithachi 2sk135/2sj50 typed as opposed to the D types used in the Q17. They are more linear but does not have the very low on resistance and high transductance of the D types. D types are more difficult to drive because of high capicitance and a very variable capacitance at that.
Hello,
Never tried them. Be careful, the pinouts aren't the same as normal MOSFETs, so they won't work with the PCBs I designed. You'll also need to adapt the gate resistors.
Regards,
Never tried them. Be careful, the pinouts aren't the same as normal MOSFETs, so they won't work with the PCBs I designed. You'll also need to adapt the gate resistors.
Regards,
Hi,
a couple of years late, but I finally had the lighting up ceremony last night.
Unfortunately it also involved some smoke on the boards, so a quick check
on what's going on shows me that at power supply I've got;
43v ac in
120v dc out
I used the Saligny standard synchronous recommended in PS
Haven't dismantled yet to examine the parts more closely, but
I'd assume that the boards have damaged components
any advice appreciated
Regards.
a couple of years late, but I finally had the lighting up ceremony last night.
Unfortunately it also involved some smoke on the boards, so a quick check
on what's going on shows me that at power supply I've got;
43v ac in
120v dc out
I used the Saligny standard synchronous recommended in PS
Haven't dismantled yet to examine the parts more closely, but
I'd assume that the boards have damaged components
any advice appreciated
Regards.
120V DC in the Q17 board?
The Q13/Q14 MOSFETs must have burned out, as well as the Zeners, and probably C13, C14, C15 and C16 capacitors as well too.
You're good to desolder all of this and test the components one by one.
Stef.
The Q13/Q14 MOSFETs must have burned out, as well as the Zeners, and probably C13, C14, C15 and C16 capacitors as well too.
You're good to desolder all of this and test the components one by one.
Stef.
Hi Stef,
thanks for your response. So some damage but not all that bad hopefully,
I noticed just one LED working on each board, smoke in the vicinity of the
signal input. Then there's the power supply, I'll need to figure out what's
going on there
Regards
thanks for your response. So some damage but not all that bad hopefully,
I noticed just one LED working on each board, smoke in the vicinity of the
signal input. Then there's the power supply, I'll need to figure out what's
going on there
Regards