75Vpk is roughly equivalent to 350W into 8r0.
Look at amplifiers that state 300W to 400W. You will find many on this Forum.
Look at amplifiers that state 300W to 400W. You will find many on this Forum.
75 volts into 8ohms at output implies rails of +-112volts at full power, unloaded rails will be higher, about +-140volts....
your Output devices needs to be able to withstand about 300 volts....
imho, you are better off doing classH instead...
I think with 15024-25 I can go up to 120 volt rail.24 pairs will give me .5 ohm handling. supply I will make 87-0-87 x2-30 amp primary that is 11 s.w.g in primary and 12 s.w.g in secondary for a toroidal core of 40 amps. I am up to that. Meanwhile Transformer for one channel in process .Attached are photos of trafo, my stock of cores,and another project started 2 years ago now time to start again.
Attachments
1000W into 2r0 requires 63Vpk.
This could be got from loaded supply rails of ~+-70Vdc.
These will probably rise to ~+-80Vdc when the amplifier is ticking over.
Your 12pair output stage using MJ15024/5 should be OK with that.
But why aim for 2ohms loading.
Why don't you build two amplifiers for 4ohms loading?
Your audience are more likely to hear your signals because two amplifiers driving two sets of speakers are more likely to keep on playing.
This could be got from loaded supply rails of ~+-70Vdc.
These will probably rise to ~+-80Vdc when the amplifier is ticking over.
Your 12pair output stage using MJ15024/5 should be OK with that.
But why aim for 2ohms loading.
Why don't you build two amplifiers for 4ohms loading?
Your audience are more likely to hear your signals because two amplifiers driving two sets of speakers are more likely to keep on playing.
"I think with 15024-25 I can go up to 120 volt rail."
Not and have any SOA left.
http://www.onsemi.com/pub_link/Collateral/MJ15022-D.PDF
50V=5A (250W)
80V=2A (160W)
100V=1A (100W)
150V=0.3A (30W)
I suggest using MJ21195/96 above 80V rails.
Not and have any SOA left.
http://www.onsemi.com/pub_link/Collateral/MJ15022-D.PDF
50V=5A (250W)
80V=2A (160W)
100V=1A (100W)
150V=0.3A (30W)
I suggest using MJ21195/96 above 80V rails.
As a side note:
I have used a Leach output stage with 10 pair of MJ15024/25 with another pair of same as drivers to run a 1Ω load with ±80V rails. Still running fine after 20+ years. Another one running ±63V into 2Ω with three pair of MJ15011/12 blew up after about 25 years (the owner liked to drive it hard into clipping from time-to-time).
I have used a Leach output stage with 10 pair of MJ15024/25 with another pair of same as drivers to run a 1Ω load with ±80V rails. Still running fine after 20+ years. Another one running ±63V into 2Ω with three pair of MJ15011/12 blew up after about 25 years (the owner liked to drive it hard into clipping from time-to-time).
DJK,
i am surprised the 3pair running into 2ohms lasted as long.
Just goes to show how gentle "loud" music is to the amplifier.
3pr @ ~250W gives a maximum output of ~300W. That 300W would be delivered into 4r0 from a +-60Vdc PSU, not 2r0.
This should be rated as a 4ohm capable amplifier.
10pr of 250W devices gives a capability of ~1000W
i am surprised the 3pair running into 2ohms lasted as long.
Just goes to show how gentle "loud" music is to the amplifier.
3pr @ ~250W gives a maximum output of ~300W. That 300W would be delivered into 4r0 from a +-60Vdc PSU, not 2r0.
This should be rated as a 4ohm capable amplifier.
10pr of 250W devices gives a capability of ~1000W
Well Mr. DJK and Mr. Andrew T.
Thanks for showing interest in my project.I am talking about 24 pairs that is 48 transistors in one channel.I have 50 pairs 15024-15025 Motorola not On with me. earlier I have used 10 pairs in one channel in dirty harry by Fotios and it is running perfectly up to 1 ohm load since 3 years.I am already using 90-0-90 in same . so I think to achieve my goal of 70 volt output in .5 ohm load with a driver circuit with rail of 120-0-120 will solve it. It is not my audience for whom I want to make this Amp. For my programes I always use Multi frequency divided system up to 6 divisions that is Subwoofer, Bass,Upper bass,lower mid,Mid.Upper mid and H.f.I do not use passive crossover not even active crossover. I use six equalizers+ 3 more for monitoring.and use up to14 stereo Amps for most of my shows. All my own made boxes and Amplifiers. I am sending Photo of one of my show.
regards
Thanks for showing interest in my project.I am talking about 24 pairs that is 48 transistors in one channel.I have 50 pairs 15024-15025 Motorola not On with me. earlier I have used 10 pairs in one channel in dirty harry by Fotios and it is running perfectly up to 1 ohm load since 3 years.I am already using 90-0-90 in same . so I think to achieve my goal of 70 volt output in .5 ohm load with a driver circuit with rail of 120-0-120 will solve it. It is not my audience for whom I want to make this Amp. For my programes I always use Multi frequency divided system up to 6 divisions that is Subwoofer, Bass,Upper bass,lower mid,Mid.Upper mid and H.f.I do not use passive crossover not even active crossover. I use six equalizers+ 3 more for monitoring.and use up to14 stereo Amps for most of my shows. All my own made boxes and Amplifiers. I am sending Photo of one of my show.
regards
Attachments
are you sure? 70 volt output in .5 ohm load is 11250 watts......you will need a traffo the size of a pole distribution transformer...
![295642d1344714150-has-any-one-built-1kw-amp-copy-my-work-table.jpg]](https://www.diyaudio.com/forums/attachments/solid-state/295642d1344714150-has-any-one-built-1kw-amp-copy-my-work-table.jpg])
Looks like we have the same shop here..I only lack Instruments..🙂
An externally hosted image should be here but it was not working when we last tested it.
For Your Consideration...
MG633x/MG941x
Advantages:
MG6332/3 & MG9412/13 Advantages:
Product Line Up
Part Number Polarity Vceo(V) Ic (A) Pc(W) Ft(MHz) hFE(min)@10A Package
MG6330 NPN 230 15 200 60 50 TO-3P
MG9410 PNP 230 15 200 35 50 TO-3P
MG6330-R NPN 260 15 200 60 50 TO-3P
MG9410-R PNP 260 15 200 35 50 TO-3P
MG6331 NPN 230 18 300 60 50 TO-3P
MG9411 PNP 230 18 300 35 50 TO-3P
MG6331-R NPN 260 18 300 60 50 TO-3P
MG9411-R PNP 260 18 300 35 50 TO-3P
MG6334K NPN 230 15 200 60 50 TO-3
MG9414K PNP 230 15 200 35 50 TO-3
MG6335K NPN 260 15 200 60 50 TO-3
MG9415K PNP 260 15 200 35 50 TO-3
MG6332 NPN 230 30 400 60 50 TO-264
MG9412 PNP 230 30 400 35 50 TO-264
MG6333 NPN 260 30 400 60 50 TO-264
MG9413 PNP 260 30 400 35 50 TO-264
MG6332K NPN 230 30 400 60 50 TO-3
MG9412K PNP 230 30 400 35 50 TO-3
MG6333K NPN 260 30 400 60 50 TO-3
MG9413K PNP 260 30 400 35 50 TO-3
http://products.semelab-tt.com/magnatec/bipolar.shtml
TTElectronics/SEMELAB.
Specially For Hi-Power Audio With Excellent SOA....
What's Your Opinion????
Enjoy And Comment....
MG633x/MG941x
- Designed specifically for linear audio amplifier applications
- High-speed fir gufg bandwidth amplifiers
- High voltage rating 230V & 260V
- Plastic TO-3P and TO-264 and metal TO-3 Packages
- Wide Safe Operating Area for high power output
- Complementary NPN and PNP parts
- Professional audio amplifiers
- Home Cinema
- Hifi
- Instrument amplifiers
- Active speakers and subwoofers
- Car Audio
Advantages:
- Wide Safe Operating area
- Extended High frequency performance
- Excellent thermal performance - smaller package for a given power
- Industry standard TO-3P package achieves higher power than larger TO-264 from competitors
- Unsurpassed linearity of hFE
- Low Saturation voltage
- Enhanced sound quality
- No Secondary breakdown exhibited unitl beyond 100V
MG6332/3 & MG9412/13 Advantages:
- Unprecedented 30A ouput current rating 100V, 4A SOA capability
- High power - 400W sing package capability
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Product Line Up
Part Number Polarity Vceo(V) Ic (A) Pc(W) Ft(MHz) hFE(min)@10A Package
MG6330 NPN 230 15 200 60 50 TO-3P
MG9410 PNP 230 15 200 35 50 TO-3P
MG6330-R NPN 260 15 200 60 50 TO-3P
MG9410-R PNP 260 15 200 35 50 TO-3P
MG6331 NPN 230 18 300 60 50 TO-3P
MG9411 PNP 230 18 300 35 50 TO-3P
MG6331-R NPN 260 18 300 60 50 TO-3P
MG9411-R PNP 260 18 300 35 50 TO-3P
MG6334K NPN 230 15 200 60 50 TO-3
MG9414K PNP 230 15 200 35 50 TO-3
MG6335K NPN 260 15 200 60 50 TO-3
MG9415K PNP 260 15 200 35 50 TO-3
MG6332 NPN 230 30 400 60 50 TO-264
MG9412 PNP 230 30 400 35 50 TO-264
MG6333 NPN 260 30 400 60 50 TO-264
MG9413 PNP 260 30 400 35 50 TO-264
MG6332K NPN 230 30 400 60 50 TO-3
MG9412K PNP 230 30 400 35 50 TO-3
MG6333K NPN 260 30 400 60 50 TO-3
MG9413K PNP 260 30 400 35 50 TO-3
http://products.semelab-tt.com/magnatec/bipolar.shtml
TTElectronics/SEMELAB.
Specially For Hi-Power Audio With Excellent SOA....
What's Your Opinion????
Enjoy And Comment....
Last edited:
hi, are you connected with SEMELAB? and where can these devices be availed of and at what price breaks? thanks...
MOSFET's For Audio Applications
And Here Are MOSFET's For Audio Applications:
Power Amplification - ALFET Lateral MOSFETs
• Professional Audio Amplifiers
• Home Cinema
• Active Speakers and subwoofers
• Instrument amplifiers
• High power car audio
Advantages:
Specifically designed for audio power amplifier output stage applications, ALFET Mosfets are an exclusive new range of devices with outstanding performance and a minimal footprint. They offer superb sonic characteristics and with the features listed below its not hard to see how we can help you to reduce size, cut costs and add real quality and functionality to your design.
• A wide safe operating area (SOA) and absence of secondary breakdown
• Reliable and robust performance when compared to bipolar solutions
• Simplified protection saving cost & reducing complexity
• Improvement of amplifier performance with awkward loads
• Oscillation-free operation on double-die devices
ALFET Mosfets also have a negative temperature coefficient and completely thermally stable bias point without the need for emitter resistors, as used in bipolar amplifiers.
Advanced technical features include:
• Simplified drive circuitry requirements through high
impedance gate
• Inherent output anti-parallel diodes
• Excellent thermal characteristics
• Single live heatsink capability (source connected case)
• Very high bandwidth and slew rate
• No high frequency cross conduction
• Easy paralleling (devices available in selected categories to enhance paralleling performance)
• Soft clipping performance
Application Note
• Lateral MOSFET Design recommendations for Audio Amplifiers
TO264
TO247
TO3
TO247-5L
Datasheets & Shortform
Part No. Polarity VDSS(V) Current ID(A) PD(W) Package Comments ALF08N16V N-channel 160 8 125 TO-247 ALF08P16V P-channel 160 8 125 TO-247 ALF08N16K N-channel 160 8 125 TO-3 ALF08P16K P-channel 160 8 125 TO-3 ALF16N16W N-channel 160 16 250 TO-264 ALF16P16W P-channel 160 16 250 TO-264 ALF16N16K N-channel 160 16 250 TO-3 ALF16P16K P-channel 160 16 250 TO-3 ALF08NP16V5 N&P 160 +/-8 TBD TO-247-5L In Development ALF08N20V N-channel 200 8 125 TO-247 ALF08P20V P-channel 200 8 125 TO-247 ALF08N20K N-channel 200 8 125 TO-3 ALF08P20K P-channel 200 8 125 TO-3 ALF16N20W N-channel 200 16 250 TO-264 ALF16P20W P-channel 200 16 250 TO-264 ALF16N20K N-channel 200 16 250 TO-3 ALF16P20K P-channel 200 16 250 TO-3 ALF08NP20V5 N&P 200 +/-8 TBD TO-247-5L In Development
Just Check And Comment, I've Found This Very Attractive To Build A Hi-Power Amp With Less Transistor Count On Power Stage Mantaining High Power Output.
Well, That's Something To Find Out, But This Components Show Very Good Specifications Don't You Think?
And Here Are MOSFET's For Audio Applications:
Power Amplification - ALFET Lateral MOSFETs
An externally hosted image should be here but it was not working when we last tested it.
Applications:• Professional Audio Amplifiers
• Home Cinema
• Active Speakers and subwoofers
• Instrument amplifiers
• High power car audio
Advantages:
Specifically designed for audio power amplifier output stage applications, ALFET Mosfets are an exclusive new range of devices with outstanding performance and a minimal footprint. They offer superb sonic characteristics and with the features listed below its not hard to see how we can help you to reduce size, cut costs and add real quality and functionality to your design.
• A wide safe operating area (SOA) and absence of secondary breakdown
• Reliable and robust performance when compared to bipolar solutions
• Simplified protection saving cost & reducing complexity
• Improvement of amplifier performance with awkward loads
• Oscillation-free operation on double-die devices
ALFET Mosfets also have a negative temperature coefficient and completely thermally stable bias point without the need for emitter resistors, as used in bipolar amplifiers.
Advanced technical features include:
• Simplified drive circuitry requirements through high
impedance gate
• Inherent output anti-parallel diodes
• Excellent thermal characteristics
• Single live heatsink capability (source connected case)
• Very high bandwidth and slew rate
• No high frequency cross conduction
• Easy paralleling (devices available in selected categories to enhance paralleling performance)
• Soft clipping performance
Application Note
• Lateral MOSFET Design recommendations for Audio Amplifiers
An externally hosted image should be here but it was not working when we last tested it.
TO264
An externally hosted image should be here but it was not working when we last tested it.
TO247
An externally hosted image should be here but it was not working when we last tested it.
TO3
An externally hosted image should be here but it was not working when we last tested it.
TO247-5L
Datasheets & Shortform
Part No. Polarity VDSS(V) Current ID(A) PD(W) Package Comments ALF08N16V N-channel 160 8 125 TO-247 ALF08P16V P-channel 160 8 125 TO-247 ALF08N16K N-channel 160 8 125 TO-3 ALF08P16K P-channel 160 8 125 TO-3 ALF16N16W N-channel 160 16 250 TO-264 ALF16P16W P-channel 160 16 250 TO-264 ALF16N16K N-channel 160 16 250 TO-3 ALF16P16K P-channel 160 16 250 TO-3 ALF08NP16V5 N&P 160 +/-8 TBD TO-247-5L In Development ALF08N20V N-channel 200 8 125 TO-247 ALF08P20V P-channel 200 8 125 TO-247 ALF08N20K N-channel 200 8 125 TO-3 ALF08P20K P-channel 200 8 125 TO-3 ALF16N20W N-channel 200 16 250 TO-264 ALF16P20W P-channel 200 16 250 TO-264 ALF16N20K N-channel 200 16 250 TO-3 ALF16P20K P-channel 200 16 250 TO-3 ALF08NP20V5 N&P 200 +/-8 TBD TO-247-5L In Development
Just Check And Comment, I've Found This Very Attractive To Build A Hi-Power Amp With Less Transistor Count On Power Stage Mantaining High Power Output.
Last edited:
Hello...
I've Entered All Information For Those Who Encounter Interest In Such Components,
I've Just Found This Site By Accident, I'll Try To Make Contact, As They Offer Email Address And Other Contact Information.
Just Post The Information Because Sounds Very Good To Start A DIY Project With Such Hi-Power Components....
Cheers...🙂
Hello Tony,
I've Entered All Information For Those Who Encounter Interest In Such Components,
I've Just Found This Site By Accident, I'll Try To Make Contact, As They Offer Email Address And Other Contact Information.
Just Post The Information Because Sounds Very Good To Start A DIY Project With Such Hi-Power Components....
Cheers...🙂
Here We Go Again...
Semelab Ltd
Coventry Road
Lutterworth
Leicestershire
LE17 4JB
Tel: +44(0)1455 552505
Fax: +44(0)1455 552612
Email: sales@semelab-tt.com
A subsidiary of TT electronics plc
Brochures
Links
Everything To Make Contact Bud....
Best Regards...😀😀😀
Contact
Semelab Ltd
Coventry Road
Lutterworth
Leicestershire
LE17 4JB
Tel: +44(0)1455 552505
Fax: +44(0)1455 552612
Email: sales@semelab-tt.com
A subsidiary of TT electronics plc
Brochures
Links
Everything To Make Contact Bud....
Best Regards...😀😀😀
Here I go Again With all you learned people's advice in same leach circuit with some changes and 15024-25 I have reached my goal of 70 volts and much more pressure. Here is snap of a new circuit I designed on multisim 11 . See the specifications with 24 pairs 15024-25 2 pair drivers and 120-0-120 rails
Attachments
I already have this primary wound traffo and collection of trannies for my project.I only try the things when I have resources .Primary is with 8 s.w.g. A coat of vectol varnish . Insulatig cotton tape and then secondry to my needs. an traffo is ready. for supply.you can imagine power by size.
Attachments
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