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Old 17th June 2005, 05:45 PM   #31
ldanto is offline ldanto  United Kingdom
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heinrich, whoever you are. are you the designer of the M250 at Makus M250

can you update the site or something? i really like the m250 and the mcd 1 and i really want the schematics for the mcd 1
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Old 17th June 2005, 06:39 PM   #32
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marcus66 is the designer of the M250.
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Old 17th June 2005, 08:25 PM   #33
ldanto is offline ldanto  United Kingdom
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thanks
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Old 23rd June 2005, 01:12 AM   #34
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I happen to have a handful of MJ15003, MJ15004. Can they be use here? What other changes have to be made when using 03/04.

Thanks for tip
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Old 23rd June 2005, 08:41 AM   #35
AJT is offline AJT  Philippines
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Quote:
Originally posted by bigpanda
I happen to have a handful of MJ15003, MJ15004. Can they be use here? What other changes have to be made when using 03/04.

Thanks for tip
i can not see why not! you can use them up to rails of +/-55volts, 4pairs is good.
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Old 24th June 2005, 04:23 PM   #36
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Do I need to make any other change to use them?
Just straight substitution ?
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Old 24th June 2005, 06:08 PM   #37
jaycee is offline jaycee  United Kingdom
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They should just drop straight in. They are slower in fT so there should be no stability problems. If you're running it heavy you might want to use 6 transistors per side instead of 4, but that's about it. You could always drop the rail voltages a little to say 50V or 42V if you want to stick with 4 pairs.
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Old 21st January 2006, 03:51 PM   #38
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Default hi to all

hi to all..

with regards to M250.. can i replace the output transistors with 2SA1302(pnp) and 2SC3281(npn)..and also the driver for C2344(npn) and A1011(pnp)..

tnx a lot...
ryan jan
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Old 21st January 2006, 09:04 PM   #39
AJT is offline AJT  Philippines
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Default Re: hi to all

Quote:
Originally posted by clovi_kate
hi to all..

with regards to M250.. can i replace the output transistors with 2SA1302(pnp) and 2SC3281(npn)..and also the driver for C2344(npn) and A1011(pnp)..

tnx a lot...
ryan jan
if you have them, use them, just beware of fakes!


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Old 22nd January 2006, 01:26 AM   #40
djk is offline djk
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" If you're running it heavy you might want to use 6 transistors per side instead of 4, but that's about it. You could always drop the rail voltages a little to say 50V or 42V if you want to stick with 4 pairs."

If they are real, four pair MJ15003/04 will have 2KW SOA at 50V. With 55V, a 38-0-38 1KVA transformer, and good heatsinking, they will do 500W into 2 ohms.
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