Power Amp PSU Board (for e.g. LYNX Amp)

[steenoe]

Just in case max voltage difference for the LM's to dispose off, is approx 40 volts, so the regulated supply is usefull only for unreg. rails up to about just over 50V (Assuming you want +/-15V). The LM's will need a heatsink like the diodes. Values are approximate.

 

[housing]

Hi Jan

2. You mention the diodes as being TO220 devices - try and incorporate pads for larger TO247/TO3P plastic pack devices as well.

Best Regards

Gary..

Please take care of the 3 leg devices like my HFA50PA60C or MUR3060CT also.

 

[Jan Dupont]

Maybe I should just make a Breadboard

 

[steenoe]

Please take care of the 3 leg devices like my HFA50PA60C or MUR3060CT also.

There is no need to be so worried about not being able to use the TO247 devices. The TO220, 15A single diodes are capable of feeding a 100 watt class A amp

ACD, feel free to filter out whatever you feel like

 

[Jan Dupont]

Thanks steenoe

I hope to post updated schematic tomorrow

 

[Jan Dupont]

Ok then... Not tomorrow yet however

I haven't added additional circuits suggested by steenoe, as I think we have to discuss the options first;

Do we want a +/-12-15V regulator circuit for driving eg. active crossovers, or should we make a separate supply for the VAS stage ?

Happy discussing

 

[Landoctor]

Regulated section

Jan,
That is what I suggested a few days ago. It would be nice to have a snap off section for regulators for the VAS stage.
It could be used for either the VAS stage, or active circuitry like crossovers, etc. depending on how it was configured.
Thanks,
Donovan

 

[Jan Dupont]

By steenoe:

Just in case max voltage difference for the LM's to dispose off, is approx 40 volts, so the regulated supply is usefull only for unreg. rails up to about just over 50V (Assuming you want +/-15V).

Many may want to use higher rails.....
I know of peoples that run the LYNX at +/-90VDC with 16 pairs of output devices

How can we best achieve both ??

 

[Nordic]

I like more modular approach... It all looked nice till I saw you also include the bridge in the PSU... Which I'm sure suits the needs of others just fine... I use metal case bridges on the heatsink.

 

[Jan Dupont]

Nordic;

The rectifier diodes has been there from the beginning

 

[Nordic]

That'll teach me to read from the end, but I find it still illustrates my desire for modular designs.

 

[gary s]

Hi Jan

Good work. Your circuit in post #26 is fine by me. Exactly what I want. After all you started by talking about a PSU for a power amp.

But by all means to make it more universal, you can add other regulator circuits if you wish. Prospective users of this board can choose to load what compnents they need for their intended application.

Regards

Gary.

 

[Jan Dupont]

Thanks Gary

However no need to make some extra regulator circuit unless it's demanded/needed.......

 

[steenoe]

Thanks Gary

However no need to make some extra regulator circuit unless it's demanded/needed.......

By all means... I didnt excactly ask for anything! I just threw out ideas when they were asked for...

 

[steenoe]

That'll teach me to read from the end, but I find it still illustrates my desire for modular designs.

I have no idea, what a post like that is supposed to mean??

 

[gary s]

Hi Jan

If you do the PCB design as per the circuit in post #26, then that is all I need for a perfectly acceptable power amp PSU.

You can count me in for at least 10 of these boards.

Regards

Gary..

 

[Jan Dupont]

Besides the 5mm terminal blocks for connection to the PCB, I will ad pads for direct wire soldering.
Suggestions for pad/hole size please

 

[peranders]

Spade or lug connectors is also good. Do you know what I mean? Those blue things in the picture.

 

[Jan Dupont]

I know them, peranders

I'll also make pads for those

 

[Jan Dupont]

Normally I hate to quote my self

Besides the 5mm terminal blocks for connection to the PCB, I will ad pads for direct wire soldering.
Suggestions for pad/hole size please

Suggestions please