Ready to populate. I changed the layout slightly to better match up with the Slewmaster.
Thanks Val. !!
Terry
Could You check my smal BJT ops with some of well known for you IPS boards please?
I just would like to make sure all is right --> i do not have any of the slewmaster IPS boards yet 🙁
I have in stock some 2sc1362 so will try to check that after my holidays.
Terry
Could You check my smal BJT ops with some of well known for you IPS boards please?
I just would like to make sure all is right --> i do not have any of the slewmaster IPS boards yet 🙁
I have in stock some 2sc1362 so will try to check that after my holidays.
Hi Valery,
Thanks, I will try that first thing tomorrow.
Hi borys,
I had your ops playing with the Krypton C for several hours. It was running on 60v rails and not breaking a sweat. I will try some other IPS tomorrow. I like it. The best thing is that it will fit in a 2U case.
I have the Cliffjumper ready to test too. I'll let you know how that goes in the morning. I wanted to test the VSHA too but I'm out of tube sockets.
Blessings, Terry
Thanks, I will try that first thing tomorrow.
Hi borys,
I had your ops playing with the Krypton C for several hours. It was running on 60v rails and not breaking a sweat. I will try some other IPS tomorrow. I like it. The best thing is that it will fit in a 2U case.
I have the Cliffjumper ready to test too. I'll let you know how that goes in the morning. I wanted to test the VSHA too but I'm out of tube sockets.
Blessings, Terry
Thanks a lot !!
It really help me a lot in development, I have only basic equipment and poor head so any help is really needed.
The Cliffjumper --> the LTP's at the front are very low biased (approx 1mA total 2x0,5mA), use standard small diode with forward voltage drop around 1,8V.
There is plan B for that IPS too but not tested yet (pic bellow)
Regards
It really help me a lot in development, I have only basic equipment and poor head so any help is really needed.
The Cliffjumper --> the LTP's at the front are very low biased (approx 1mA total 2x0,5mA), use standard small diode with forward voltage drop around 1,8V.
There is plan B for that IPS too but not tested yet (pic bellow)
Regards
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The Cliffjumper is singing. Sounds fine. Square waves look a little rounded. I used 2u2 for the input cap cause I didn't have 3u3. I thought this might be the reason so I bypassed it. When taking readings after this the square waves looked the same but after a few seconds the driver on the - side shorted again and burned the resistors again and of course blew the fuse. Strange stuff.
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OK, 47p is a bit too much - it removes oscillation but limits the bandwidth a bit more than we need. Try to decrease it to, say, 10p.
With 10p the oscillation is back just like before.
EDIT;
Let me get back to you. I want to try it with a bona-fide Slewmaster OPS and see if I see the same thing.
One more question. I didn't use KSA1142. Is there something different about those? I used 2AS1362.
EDIT;
Let me get back to you. I want to try it with a bona-fide Slewmaster OPS and see if I see the same thing.
One more question. I didn't use KSA1142. Is there something different about those? I used 2AS1362.
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Update,
I hooked it up to my 5P Slewmaster OPS. No oscillation with or without the cap. So it is related to the small OPS.
I hooked it up to my 5P Slewmaster OPS. No oscillation with or without the cap. So it is related to the small OPS.
Looks like a thumb drive next to the Slewmaster.
It sounds really good and the amp is dead quiet.
There are some funny nodes on the verticals but the tops stay pretty straight. This is with the 10p cap installed.
I also have a 2u2 input cap rather than the 3u3 called for. I'm not sure if that matters.
Blessings, Terry
It sounds really good and the amp is dead quiet.
There are some funny nodes on the verticals but the tops stay pretty straight. This is with the 10p cap installed.
I also have a 2u2 input cap rather than the 3u3 called for. I'm not sure if that matters.
Blessings, Terry
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I was looking at your slew setup to moderate my next "move".
I think I can get the "hulk" (below) to be "drop-in" compatible with the
original 5P slewmaster.
Just a little longer (247mm = 9.75").
Why the hulk ?
MT-200 = 5- pair , thermals spread out better for 2Kw of devices.
With 3 pair of whatever , still ... better thermals. (pretty universal)
300W - 500W !! (<800/4R) - your choice.
Since I am totally redesigning it .... should I make it VFET compatible ?
The thermals would be better here ... plus I could add the zener Vgs
protection ??
I'll move this discussion over to the main thread later.
OS
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Yes, the only hassle to making the original into a Hexfet was soldering the protection diodes to the bottom and cutting in an LED for the VBE. Should be very easy to incorporate.
My only question is what are you going to do with all that power? 😱 These are hifi not Pro sound systems. The Grateful Dead have disbanded. 😎