So Sick of SEARCHING, help me find a good +/- 24v regulator PLEASE!

[Destroyer OS.]

This is the last hang up on me ordering everything I need for my JFET line-amp....

I need 24v +/- regulators. If I do not find them I have to go battery. The ones I have found are what look to be crap from parts express, or impossible to find for sale LT1033CTs.

This is driving me nuts.

[ostripper]

Do you mind building one from scratch (discrete)? If so
I could find/advise you on one. What is current required?

newark.com has both +24v and -24v on semi regs in
stock for .22c and .55c,

but if you want more current I have circuits for trimmable
precision voltage reference /741/3055-2955 based
high power regs. (I use these in my homemade lab
supply , only 2-3 microvolts ripple @ 5A)

[BobEllis]

I've got a scalable regulator board to spare that will do 400 mA pretty comfortably. See this thread: Scalable PSU/regulator GB

To bump it up from 15V to 24V would require a resistor change and changing the output caps to 35V rating. Pretty simple, and sounds better than 3 pin regulators to my biased ears.

[CBS240]

Why don't you create a clean DC reference voltage then build a descrete amplifler to amplify that reference voltage to 24V? Then build an equal but opposite polarity circuit. You will be able to get a nice wide bandwidth if you design it right. If there is no IC solution to your problem, maybe descrete is the way to go.


I'm sure there are folks here that could help.

[Destroyer OS.]

I am willing to go discrete. I am looking for 1a per regulator should be the most I will ever need. I suspect the draw to be less but there are no numbers on it.


CBS240 that sounds fairly good but as far as designing that might be to far.... (I have to research etc because my abilities are not up high enough)

[CBS240]

What are the output requirements other than 24V? What is the load this regulator (amplifier) is to drive?

[ostripper]

here are circuits... /Power_supply/

Lab ps (2nd one down is good) or for real precision
low noise voltage reference buffered by 741/current
follower would give you the lowest ripple.

[Destroyer OS.]

The PSU that they are going in is just a simple four diode and some caps. Originally, I am up to new ideas.

The PSU will be driving 4 JFET K170BLs, with around 44k of resistance a piece or so... to complete the circuit. This is just a line amp. (super high quality one though even with just the couple of parts)

[CBS240]

Here is a quick sketch of a circuit I am using in my amp. If you only need a few mA, a darlington will not be needed, but that is a minor detail.

[Bonsai]

If you want something quick with good performance, go for a LM317 for the positive reg and an LM337 for the negative reg.

Go onto the Natsemi website, you can pick up the data sheets there with full cct diagrams and calcs required to give your desired output voltage.

On these regs, you can bypass the reference pin with a cap and get very low noise.