100W Ultimate Fidelity Amplifier

[Landoctor]

Very nice!

Very nice job Terry!

Hey Guys,

I finished the P30.

P30, MM3, TB3, Shunt Regs and A Class PSU.

I added a volume control/channel switcher with remote. Pretty cool setup.

 

[Landoctor]

A40 Questions

I have a nice chassis and PSU parts that I would like to use (if possible) to build an A40.
The 1200va toroids I have are 60-0-60, which gives me ~80v DC rails after rectification and CLCRC filtering. Is there anyway to use this to power an A40?

Next, has anyone done a dual mono setup (layout and pcbs) for this amp?

Thanks for your time,
Donovan

 

[evanc]

Terry,
Hats off to you. That is one awesome unit you have put together. I love seeing circuits go from theory/test pieces into real pieces of useable gear.
Humbly yours,
Evan

 

[miro1360]

Hey Guys,

I finished the P30.

P30, MM3, TB3, Shunt Regs and A Class PSU.

I added a volume control/channel switcher with remote. Pretty cool setup.

awesome work

 

[still4given]

I have a nice chassis and PSU parts that I would like to use (if possible) to build an A40.
The 1200va toroids I have are 60-0-60, which gives me ~80v DC rails after rectification and CLCRC filtering. Is there anyway to use this to power an A40?

Next, has anyone done a dual mono setup (layout and pcbs) for this amp?

Thanks for your time,
Donovan

Hi Donovan,

I believe +-80V is too high for the A40. Yo may need to look at one of Mile's class H amps. I'm not sure if the A40 could be modified to handle more output transistors. That might be a possibility. My A40 uses 63V caps so +-60V is about all I can go. Even that will be working hard with a 4 ohm load. Mile did design a PSU that is adjustable so that also might be a solution.

 

[panggih]

The P30 layout is from Alex. The others are from Mile and I just copied them in Sprint. I'm attaching the Sprint file with all of the circuits I used.

Hope this helps.

I alredy save this file,but after extracted i only see PSU file no another file.
What's the problem sir?

 

[Landoctor]

Thanks Terry.
How about 70vdc rails, if I had the caps and components to support it?
My other option is to go with a much less powerful power supply and hope it would work with my power hungry speakers.

 

[still4given]

I alredy save this file,but after extracted i only see PSU file no another file.
What's the problem sir?

Did you look at the tabs at the bottom?

 

[thimios]

I alredy save this file,but after extracted i only see PSU file no another file.
What's the problem sir?

You need Sprint Layout software ,then look on the bottom left.Switch between all.

 

[still4given]

Thanks Terry.
How about 70vdc rails, if I had the caps and components to support it?
My other option is to go with a much less powerful power supply and hope it would work with my power hungry speakers.

Mile would be able to answer that better. For sure you will need to use at least 80V caps. Maybe Mile will chime in.

 

[apexaudio]

I have a nice chassis and PSU parts that I would like to use (if possible) to build an A40.
The 1200va toroids I have are 60-0-60, which gives me ~80v DC rails after rectification and CLCRC filtering. Is there anyway to use this to power an A40?

Next, has anyone done a dual mono setup (layout and pcbs) for this amp?

Thanks for your time,
Donovan

Use Regulated PSU for Amps with 4 pairs of outputs, output voltage can be set from +/-55V to +/-90V.
Regards

 

[apexaudio]

Amp with Pot Selector.

 

[thimios]

Use Regulated PSU for Amps with 4 pairs of outputs, output voltage can be set from +/-55V to +/-90V.
Regards

Hi Mile,can you post pcb for home make?

 

[apexaudio]

Hi Mile,can you post pcb for home make?

You can find all files in thread: http://www.diyaudio.com/forums/solid-state/173462-studio-reference-amplifier.html
Regards

 

[Landoctor]

Thanks Mile.

Use Regulated PSU for Amps with 4 pairs of outputs, output voltage can be set from +/-55V to +/-90V.
Regards

 

[panggih]

You need Sprint Layout software ,then look on the bottom left.Switch between all.

Ok still4given,thimios, i will see again on the sprint layout7.
Thanks

 

[still4given]

Hi Guys,

The sprint file I posted had an error in the 18V shunt. I have corrected it and am sharing the corrected file below. If you want you can just correct it in you file or download the new zip file.

Thanks, Terry

 

[Landoctor]

Help! ;-)

Can someone out there help me with making a dual mono layout for the A40?

I have a large (5U Dissipante) chassis that previously housed a couple of different class A amps and would like to use the PSU, etc. for this project if possible.

Thanks for your time,
Donovan

 

[thimios]

A40

Is this what are you looking for?

 

[apexaudio]

Pot Audio Selector with 5 channel.