Hi,
Yes the power supply from Elektuur 1982 is an "old design"
But the design is based on the developments of Harrison / HP from the end of 1950.
As far as I am concerned this is still one of the best designs for linear power supplies.
As it is shown in the "real" schematic with relatively old components also has a big advantage.
The low bandwidth of the 2N3055 and the uA741 opamps makes it very stable for rebuilding.
This same design can also become an even better power supply with faster components.
Without knowledgehow how to do this, I would not start modifying the design/schematic!
Here some advice.1e
So don't go modifying this design if you have no knowledge of phase margin and loop control!
2e
Stick to the original schematic, good versions of the 2N3055 transistors and the uA 741 ic are still available.
3e
Don't use China junk bought through ebay/Ali.
4e
Gives a lot of attention to your wiring technique, wires are also inductances and resistors.
5e
Places the electronics far enough away from the transformer and the wiring of the bridge rectifier and buffer electrolytics.
6e
It is possible to get very low hum and noise values with this power supply design.
But if the above regarding the transformer and wiring is ignored the good features are thrown out the window.
7e
A toroidal transformer gives and much smaller interference field and that is my preference to use.
Twist the transformer wires and also the wires to the buffer elco's.
8e
Do not place the power supply in a cabinet that is too small, the power supply will become much too hot under maximum load.
9e
I regularly build power supplies which I then equip with a CPU cooler with good fan control.
Most of the time the fan is inaudible but still cools well because it is set slightly above the minimum speed for the fan used.
This way you always have airflow and it keeps the power supply cool and the fan is only audible when needed.
10e
Most who build a power supply's choose the heatsink too small, give this attention!
If possible, mount the 2N3055 directly on the heatsink and then isolate the heatsink, for optimal cooling
If this is not possible, use a "thin" mica plate, with a thin layer of a good heatsink paste on both sides, that is also used for CPUs, often these is heatsinks paste with silver in them.
11e
Use a snubber over the transformer windings. and your Power Switch.
12e
You want a 5A continu power supply? then you need a 5A/0.63 transformer, that wil be a transformer that can deliver 8-Ampere!
13e
Mmmm
I see that schematics are " redrawn " these are to me horribly unreadable.
Look at the original diagram, which is not optimal but can be understood reasonably well at first glance if you are familiar with the components used.
Dividing the schematic into blocks is the horror taken from the draftsmen of digital electronics, bad practice.
14e
Sorry for the sometimes crooked sentences, I am dislectys and use a translation machine, so that's is not win-win but lose-lose.
I hope this helps
Kind regards
Bram