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Old 28th September 2012, 07:41 PM   #21
pergo is offline pergo  Italy
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original are 1.75W (without heatsink), 2A, 100V, hfe 80 @50mA, 50MHz

MPSW are 1W, 0.5A, 80V, hfe 80min. guaranteed @50mA, 50MHz

The differences in Ic aren't a problem.
At full power, 2ohm stereo, each output get 3A(rms).
So, each base draw 60mA(rms) (50 Hfe for the outputs). There are 4 bases for each driver.
240mA(rms) required < 500mA continuous (rms)


I've repaired a lot of 2150GX/SX with the MPSW's with no problems after years.
Pinout is the same.
Less expensive.
More easy to find.


For high-power HCCA's is a different story
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Old 28th September 2012, 08:52 PM   #22
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Quote:
Originally Posted by 90scaraudio View Post
The TIP 31 and 32 work but you have to move the EBC different.
Mouser has these for $0.60 ea.
I think these may not work as posted in a different forum... Someone tell me if I'm wrong...

MPSU07/57 replacements (Amplifone) - IAM/KLOV Coin-op Videogame, Pinball, Slot Machine, and EM Machine Forums

dezbaz
08-14-2011, 06:35 AM

I've seen TIP31 and TIP32 been advised as replacements for the CEN-U07 and CEN-U57...

Tips are not replacements unfortunately, the freq. is way too low

Last edited by 90scaraudio; 28th September 2012 at 08:57 PM.
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Old 28th September 2012, 08:56 PM   #23
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Quote:
Originally Posted by pergo View Post
original are 1.75W (without heatsink), 2A, 100V, hfe 80 @50mA, 50MHz

MPSW are 1W, 0.5A, 80V, hfe 80min. guaranteed @50mA, 50MHz

The differences in Ic aren't a problem.
At full power, 2ohm stereo, each output get 3A(rms).
So, each base draw 60mA(rms) (50 Hfe for the outputs). There are 4 bases for each driver.
240mA(rms) required < 500mA continuous (rms)

Cool... thanks for the info... hope it helps others... I think I have a bin full of both of these types...have to look

I've repaired a lot of 2150GX/SX with the MPSW's with no problems after years.
Pinout is the same.
Less expensive.
More easy to find.


For high-power HCCA's is a different story
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Old 28th September 2012, 08:57 PM   #24
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I have used the 6488/6491 as subs in the past. Now I use the MJE15030 and MJE15031.
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Old 28th September 2012, 09:04 PM   #25
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Quote:
Originally Posted by Perry Babin View Post
I have used the 6488/6491 as subs in the past. Now I use the MJE15030 and MJE15031.
Thanks Perry... wish I knew this a few years ago!
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Old 29th September 2012, 12:24 AM   #26
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90scaraudio had some of the CEN trans and will be shipping them, I also just ordered about $70 worth of parts off off mouser (25 of the 2N6488, 8 of the 2N6491, 4 of the 50v caps and 2 of the 16V caps). I figured while I have the amp apart I might as well get all these transistors on the heat sink replaced with properly matched new ones (I am thinking my mistake last night might have cost me a few of the power supply transistors since I am showing shorts on both sides and also now on the channel I had working). Perry, I don't know why I didn't reference your material first, I guess I was getting comfortable working on amps from what I had learned from the bulk of your tutorial I didn't think about looking at the misc section for this old school amp. I find I am learning a lot of lessons the hard way, LoL.
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Old 29th September 2012, 02:12 AM   #27
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Quote:
Originally Posted by Perry Babin View Post
Do you have any transistors on hand as of now?

Did you read all of the information on the older Orion amps in the miscellaneous stuff folder? search for all .txt and all .htm files in the following folder and read all of it. There isn't anything specific that you need to know right now but you should read it.
repair_tutorial\miscellaneousstuff\orion
Perry, I can't seem to find the info you mention. (repair_tutorial\miscellaneousstuff\orion)
Can Anyone point me in the right direction
Thanks much
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Old 29th September 2012, 02:51 AM   #28
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It's on the DVD he purchased.
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Old 29th September 2012, 02:57 AM   #29
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How can I purchase one?
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Old 29th September 2012, 03:48 AM   #30
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Email me. Anything that relates to sales is against the rules on this forum.

babin_perry@yahoo.com
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