I happens to have some of this power trans and transformer that gives me 2x54V DC. Can anyone "come up" with a DIY project that includs a PCB (to copy or to buy) that "suits" this components??
Eivind Stillingen
Eivind Stillingen
It's a big thread with lots of good stuff available for your consideration:
SlewMaster Thread
Different members have made boards, so you might be able to get some to build with, or use the files and order some for yourself.
SlewMaster Thread
Different members have made boards, so you might be able to get some to build with, or use the files and order some for yourself.
How many do you have ? 2 pair each (8 total) would have a 200 watt amp.
Try this group buy. -http://www.diyaudio.com/forums/group-buys/257057-slewmaster-project-boards-7.html
If he has gone through all these boards - I'm upgrading to the board on the
above link - my present boards will take 6 of those sankens as a very
powerful 300W class AB amp - I'll sell them cheap.
These "slewmasters" are about the only forum kit especially suited for
the MT-200's. A much more refined project than any Ebay offering.
BTW , this is a output stage/ input stage modular project ... you get
to choose just about any forum amp (sansui , sony , adcom type input stages).
OS
Maybe clone of Marantz MA9S2 or PM11S2 (or S1)? Service manuals are availiable and include PCB vievs.
build a Honey Badger amp detailed in these forums with those outputs.
it will be better than the original.
it will be better than the original.
stocktrader200
I will go for a Honey Bader.PCB already ordered. Did you do any changes from the original when you used 2SC2922SA1216? I will connect the output using wires because of the heatsinks that I already have. Any problems with this mounting of the devices?
Eivind Stillingen
I will go for a Honey Bader.PCB already ordered. Did you do any changes from the original when you used 2SC2922SA1216? I will connect the output using wires because of the heatsinks that I already have. Any problems with this mounting of the devices?
Eivind Stillingen
I already did the preliminary on a badger - mt-200. The outputs will just barely
fit physically. The drivers will also barely fit. You might have to drill the Q13/14
holes out to mount the drivers closer to the PCB.
That the physical half of this. Electrically - compare the "typical" current gain
of a 2sc2922 to a njw0281 (below). The drivers will see a higher load <8R , especially
at 4R. In fact , you will never reach the 3 pair 2SC2922/2SA1216 maximum
SOA before driver failure.
In short , the badger is an EF2 designed for high beta outputs.
You might get away with 2 pair in the badger , here you could just run the VAS at
10ma Ic.
The multi pair 2SC2922/2SA1216 amps I've seen were all EF3 with huge mt-100
drivers.
(below 1 and 2 - 2922 and 0281 - middle plots)
OS
Attachments
mje15034, mje15035 should have no problem driving those 2SC2922, 2SA1216 outputs with small heatsinks on them. TO220 clip ons.
mine has 2SA2525 2SA1075 output MT200 transistors.
i also subbed a mosfet into the VAS stage Q9 and Q10
it's a sweet amp
mine has 2SA2525 2SA1075 output MT200 transistors.
i also subbed a mosfet into the VAS stage Q9 and Q10
it's a sweet amp
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