PSU for SL-1210 with pics

[leo]

The stock regulator should be removed or at least its output isolated , its not advisable to have the output of the new regulator running into the output of the unpowered stock one

[MartinT]

The stock regulator should be removed or at least its output isolated , its not advisable to have the output of the new regulator running into the output of the unpowered stock one

Agreed.

[MartinT]

Under test...

[leo]

Looking good Martin , its quite a compact reg too

[MartinT]

its quite a compact reg too

It is for a 2.5A reg, but then an LM-317T is even smaller and can handle 1.5A.

[UV101]

It is for a 2.5A reg, but then an LM-317T is even smaller and can handle 1.5A.

Hi Guys,
Given the problems with heat dissipation I've recently encountered on my low noise linear 5v reg for the SB3, i'd be interested to know how this reg behaves driving 2.5A and using the case lid as a heatsink?

Are the teddy regs better/more efficient in this area?

Cheers

[leo]

You'd still want a meaty heatsink driving that sort of load, the Super Teddy regs use D44h11 devices which are pretty hefty, the Hammond case used as a heatsink should be fine for the Techie but not enough for a SB3

Circuit for the Super Teddy reg http://www.teddypardo.com/Images/SuperTeddyReg3.png

If you set this reg for 5v it'll probably drop a fair bit after being loaded with something as heavy as the SB3 so I'd load it with a power resistor first to give the same load current and then tweak the reg until it stays at the required voltage

[twelvebears]

I live at the edge of the known world (The Isle of South Uist). Any further West and you fall off the edge.
Regards
Paul

Good grief Paul, just looked your manor up on Google. Could you live anywhere more remote?

[MartinT]

You'd still want a meaty heatsink driving that sort of load

I'm concerned but will monitor things very carefully. If necessary I'll relocate the ST elsewhere and use a proper heatsink. Will perform some open-box soak testing first.

What sort of heat rise are you getting from your PH module running the Techie?

[Paul Hynes]

Hi Steve,

Remote is good. Nice and peaceful. There is nothing to interfere with my music like noisy neighbours. I do have customers in more remote places. One lives in Inuvik in the Arctic Circle. It gets pretty cold there, especially in winter, as they loose the sun completely from the horizon for over a month. We are lucky to have the Gulf Stream here.

Incidentally, for those who have expressed an interest in the Hebrides, I noticed in the Scottish version of the Radio Times that a new series, “Monty Hall’s Great Hebridean Escape” is scheduled to start at 9pm on BBC2, Wednesday next. I am not sure if it will be broadcast south of the border, but if his Applecross adventure last year is anything to go by it will be worth watching. He was based in North Uist, a couple of islands North of here. This should give an idea of the area although there are subtle differences between the islands.

Theoretically the Isle is my manor, and I can have a say in it’s future, as the local community exercised their right to buy the Isle of South Uist, The Isle of Eriskay and most of the Isle of Benbecula from South Uist Estates a few years ago. A trust company has been set up to run the estate on behalf of the community.

Regards
Paul