Heat sinks
I'm going to use these:-
Large Aluminium Heatsink - 320 X 300 X 75mm 12.5 X 12 X 3” Approx 5.5kg | eBay
They come from failed Power-One Aurora Pvi 3.0 Solar Pv Inverters I paid £30 each for 3 including shipping within the U.K. I plan to cut them in half to make approx 160 x 300 x 75 heatsinks. They require minimal other work (other than the drilling and tapping we all love to do!) I've also got 15mm thick aluminium for the front plates. Now all I need is a wonderful main PCB, possibly designed by a modest, self effacing, hard working genius who cares only of others.... I am prepared to post the case design when it's finished for anybody that would like it.
My unending thanks to Mr Pass and Zen Mod.
Stay safe.
I'm going to use these:-
Large Aluminium Heatsink - 320 X 300 X 75mm 12.5 X 12 X 3” Approx 5.5kg | eBay
They come from failed Power-One Aurora Pvi 3.0 Solar Pv Inverters I paid £30 each for 3 including shipping within the U.K. I plan to cut them in half to make approx 160 x 300 x 75 heatsinks. They require minimal other work (other than the drilling and tapping we all love to do!) I've also got 15mm thick aluminium for the front plates. Now all I need is a wonderful main PCB, possibly designed by a modest, self effacing, hard working genius who cares only of others.... I am prepared to post the case design when it's finished for anybody that would like it.
My unending thanks to Mr Pass and Zen Mod.
Stay safe.
Yes, true it is a disadvantage. I had thought of making the VFET version that would have needed connection via wires. (I suppose it may be a good idea to have a screen on those). Mounting the PCB with it's device on the other heatsink. I was also thinking of using a copper heat spreader bar 50 Wide x 10 Thick x 150 Long, (or so). All aimed at max even heat dissipation, and hence the ability to experiment with different bias values.
no problem with SIT, or even one of pucks, to be mounted on other side/heatsink
in most cases with Papastyle amps, you'll getting enough thermal tracking for proper functionality even just from everything being in same containing volume ( meaning - box)
though, keeping gate stopper resistor near gate is a must , easy with soldering it on end of wire and using heatshrink
in most cases with Papastyle amps, you'll getting enough thermal tracking for proper functionality even just from everything being in same containing volume ( meaning - box)
though, keeping gate stopper resistor near gate is a must , easy with soldering it on end of wire and using heatshrink
Gary, that Wabbit is still in Woods, deep
though, as anything I made lately - as Pa is saying ......... I loooove to make amps ...... and I loooove selling them ....... (which allows me to make more amps)
Take a vacation to the southern hemisphere to build winter amps. Brain problem solved.
say that to Pa
I'm trying all these years, but he simply refuses to adopt me
This is Zen-Mods "Dance of the seven veils", we are all excited after the fifth was removed, and by now think that we can see some really "interesting" bits.. I am sure that patience will be rewarded in good time, (after all, it is a virtue) and will be greatly entertained when we finally get to see Zen-Mods "Pride and joy"..
writing abouty nasty Wabbits, I forgot to address tech side of question
yes, two OS pcbs and one FE pcb - per channel
best made as monoblocks, counting on fact that I believe 150W of dissipation is lowest I can think of ; 200W even better
for 150W of heat, Modushop 4U/400 would be OK
for 200W of heat, Modushop 5U/500 logical step
though, if I get that Wabbit, it'll be at least 150W/8R/ch Beastie
later or sooner, I'm going to took my chances
lazy evening
not in a mood for some serious work (as ZM is ever serious, even when working)
so, few funny pics, just to show that things are often simpler than they looks
simplified schmtcs of one already made and of hypothetical one, that one called Wabbit, for now
of course- ignore parts numbering (if shown) - it's irrelevant
not in a mood for some serious work (as ZM is ever serious, even when working)
so, few funny pics, just to show that things are often simpler than they looks
simplified schmtcs of one already made and of hypothetical one, that one called Wabbit, for now
of course- ignore parts numbering (if shown) - it's irrelevant
Attachments
Last edited:
Revelation!!
See here
Few more, before sleep
After thorough examination, ZM's 'Rithmetic sez - these amps are simply not having stages at all
I devised Stageless amps!
See here
Few more, before sleep
After thorough examination, ZM's 'Rithmetic sez - these amps are simply not having stages at all
I devised Stageless amps!
Attachments
what!?
still no one made XA252 Ultrasymmetry amp?
naah.......
I did order FE pcbs today , for "Winter is coming" amp
now, just to see whom I'm going to kill/rob, to buy 4N and 4P pucks
in fact, I'm good - having 2+2, still on T-Bed 2, so I'm going one day to try/measure/tweak just one channel
I mean - either that, All the Glory...... or Public Disgrace, again
still no one made XA252 Ultrasymmetry amp?
naah.......
I did order FE pcbs today , for "Winter is coming" amp
now, just to see whom I'm going to kill/rob, to buy 4N and 4P pucks
in fact, I'm good - having 2+2, still on T-Bed 2, so I'm going one day to try/measure/tweak just one channel
I mean - either that, All the Glory...... or Public Disgrace, again
