Has anyone used Semelab's MG6333K & MG9413K complementry bipolar devices ? - diyAudio
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Old 20th September 2014, 06:04 AM   #1
kimbal is offline kimbal  Australia
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Default Has anyone used Semelab's MG6333K & MG9413K complementry bipolar devices ?

I'm looking into building another super-amp after many years of doing nothing and thinking about it. Part of my Bucket List !

Presently I'm favouring the Semelab Bipolar devices, in luie of the older MJ15003/15004 devices which I have found to be very good.

The Semelab devices I understand are the most powerful Audio Transistors on the market - boasting a 400 watt Collector Rating and a Vceo of 260 Volts (or 230 Volts for the lower version ) with an Ic of 30 amps. They are T03 packaged devices > MG 6333 K & MG 9413 K and the lower voltage 230 Volt version MG 6332 K & MG 9412 K.

I believe 8 of these higher voltage devices will do about 1,000 watts RMS at 8 ohms allowing them to run as high as +/-130 Volts Dc Rails and still remain inside their SOAR region. This equates to around 85 Volts RMS across the speaker.

Has any one actually used these transistors and if so how much were they and what results did you have ? I intend to use the metal T03 package version and not the lower rated plastic packs of the same series.
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Old 20th September 2014, 07:27 AM   #2
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Kilo-watts with class AB???
A ton of heat.

I don't have experience with Semelab bipolars, but many with Sanken. The limitation about 500W per 8R (limit Vce of devices).
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Old 20th September 2014, 09:00 AM   #3
kimbal is offline kimbal  Australia
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Originally Posted by Walkalone View Post
Kilo-watts with class AB???
A ton of heat.

I don't have experience with Semelab bipolars, but many with Sanken. The limitation about 500W per 8R (limit Vce of devices).
Can you send me some type numbers, or links to data sheets, to browse some of these devices ? What sort of Vce limits do they have ? Most devices I'm aware of don't do much better that 100 Volts or so because of SOAR limits. Thanks.
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Old 20th September 2014, 09:53 AM   #4
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Largest SOA of Sanken is 2SC3264, 2A@100V@DC. But Vce was limited at 230V. That say you can run max at 100V rail.
The modern LAPT tran is 2SC6145A with 260V Vce. The rail maybe higher, but haft SOAR.
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Old 20th September 2014, 02:44 PM   #5
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Its a good idea to search a topic - the same questions often pop up several times a year and big, economical power transistors are always in demand. Have a look at this thread: The "most powerful" Audio Transistors on today's market - Any experience with these ?
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Old 21st September 2014, 11:10 AM   #6
kimbal is offline kimbal  Australia
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Originally Posted by Ian Finch View Post
Its a good idea to search a topic - the same questions often pop up several times a year and big, economical power transistors are always in demand. Have a look at this thread: The "most powerful" Audio Transistors on today's market - Any experience with these ?
Thanks Ian - I did a quick search and nothing came up under the type numbers and thought my post was on another site.
Cheers !
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Old 21st September 2014, 04:36 PM   #7
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... nothing came up under the type numbers and thought my post was on another site.....
Yes, our search engine isn't exactly wonderful so now I just use Google and the DIY audio threads grouped there are quickly and easily accessed. Once it is attuned to your interests and favourites sites it becomes a phenomenal resource
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Old 21st September 2014, 06:17 PM   #8
mt490 is offline mt490  Australia
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It does also over learn and comforts you to your own circles of knowledge if you are not careful.

The only solution is to be aware of this and remember to explore the contrary and the affirmative.
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