Thank's Michael do you still favour the IRFP250...
Well, it wouldn't be a fair comparison because I ran the hockey puck at 60V 4A with around one-fifth the distortion. I haven't logged a lot of listening time with that one yet.
Well, it wouldn't be a fair comparison because I ran the hockey puck at 60V 4A with around one-fifth the distortion. I haven't logged a lot of listening time with that one yet.![]()
Hi Mike,
What inductor did you use for the hockey puck version?
Thanks,
Dennis
Well, it wouldn't be a fair comparison because I ran the hockey puck at 60V 4A with around one-fifth the distortion. I haven't logged a lot of listening time with that one yet.![]()
Sorry, I meant 36V 4A
The inductor in that case was a Hammond 100mH 5A. The part number escapes me at the moment. It's big.
Hammon make a non shielded 5A 100mh choke the 195T5 . Depemding on who you buy it from it's about $90 give ot take a few dollars. And as Michael said it's big weighing 14lbs. I shure wish I had bought more than one when someone had them on Ebay for $35 including postage ....
Michael it would be good if DiyAudio store would stock the PCBs.
Tell Variac.
I think you'll be perfectly happy with those.![]()
Yeah...start with 193V/IRFP250 then go 195T5/hockey puck and recycle 193V in Vfet L'amp...
Look what I got for my B-day!
The Dude would approve.
Mrs. R is a thoughtful lady.
Happy Birthday Michael
Nice for keeping You warm at BAF17
Please accept my virtual B-day gift is the hockey version
![birthday :birthday: :birthday:](https://files.diyaudio.com/forums/images/smilies/birthday.gif)
![present :Present: :Present:](https://files.diyaudio.com/forums/images/smilies/present.gif)
An externally hosted image should be here but it was not working when we last tested it.
MR. Thanks for a great contribution that I can't wait to try!
DB120-20 AAVID THERMALLOY, Heat Sink, Square, For 80MM Power modules and Solid State Relays, 0.41 degC/W, 135 mm, 125 mm, 120 mm, Newark element14 Canada
Regards,
Dan![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
DB120-20 AAVID THERMALLOY, Heat Sink, Square, For 80MM Power modules and Solid State Relays, 0.41 degC/W, 135 mm, 125 mm, 120 mm, Newark element14 Canada
Regards,
Dan
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The following heatsinks worked famously when I built Michael's IronAmp!
NV115-1 AAVID THERMALLOY, Heat Sink, PCB, Board Level, 0.5 degC/W, 119.89 mm, 119.89 mm, 115 mm, Newark element14 Canada
![wizard :wiz: :wiz:](https://files.diyaudio.com/forums/images/smilies/wizard.gif)
NV115-1 AAVID THERMALLOY, Heat Sink, PCB, Board Level, 0.5 degC/W, 119.89 mm, 119.89 mm, 115 mm, Newark element14 Canada
![wizard :wiz: :wiz:](https://files.diyaudio.com/forums/images/smilies/wizard.gif)
Attachments
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I built one with the IXFN44N80P.![]()
I was playing with Big MoFo.
This one need nice front end and preamp with lots of gain.
Do IXYS version have better specifications versus IRFP ?
Dreaming about The Dude at BAF17
Attachments
I was playing with Big MoFo.
This one need nice front end and preamp with lots of gain.
Do IXYS version have better specifications versus IRFP ?
Dreaming about The Dude at BAF17
Well, the distortion was lower due mainly to the much higher bias, and the output impedance is a little lower. I haven't spent any time listening to it yet.
It's really just a case of me taking things to the extreme out of morbid curiosity and the pure fun of it. Whether it sounds better or not wasn't really the priority.
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