New Aleph Mini PCB GB

[troystg]

You could easily use Digi01's LM338 boards for this, the current and voltage is well within their specs.

For the main board "ONLY" not the output boards correct?

I would hate for someone to let out more smoke..

 

[tiroth]

They are spec'd to 5A, I believe. I don't know how much you can realistically get out of a single regulator though in class A...the thermal demands are much higher.

"Use with caution" depending on your bias, perhaps.

 

[jleaman]

That is true about the Digi Boards i have 4 set's too : O ) I wonder if they will handle the current though. Also would have to change some parts to get 15V rail's

Jason

 

[metalman]

I've been using an LM338 regulated power supply for a while now as a generic supply for various projects, with the output as high as +/-30V at 4 amps continuous, with occasional short demand spikes as high as 10A, so I don't see a problem with using them to regulate the whole amp supply. That being siad, I would err a bit on the side of caution, and separately regulate each channel. Also, don't forget to put a big schwack of capacitance after the regulator too.

 

[jleaman]

I think ill use my regulator boards : O ) now to find the exact part to get the output after the regulator to 15V

 

[tiroth]

You can throw a pot in there, tune it, and then just measure the values. Probably the easiest way.

 

[jleaman]

You can throw a pot in there, tune it, and then just measure the values. Probably the easiest way.

A pot in where ? On what resistor i don't have the schematic..

 

[jleaman]

Never Mind i found it.

 

[BrianGT]

Wonder how hard it would be brian to build a nice regulated board for this power supply.

I have a design partially worked out with a power supply board, allowing for the option of regulation. I will post details of the setup when I have time. I will be back from my business trip on Saturday night, and I can talk to you then.

--
Brian

 

[APK]

As I am relativly new to this game, can anyone please give me a short descpiption of balanced and unbalanced inputs and the pro's and con's .

Tony

 

[troystg]

As I am relativly new to this game, can anyone please give me a short descpiption of balanced and unbalanced inputs and the pro's and con's .

Tony

Tony-

Not to be rude, but ANY effort put into a search and a little light reading will answer that question.

 

[steenoe]

My current idea is stay close to the service manual

That would be a good idea Unless you design a regulated psu board to meet the specs and a bit more
Count me in for a few of these boards. My old chassis for Zen amps needs new stuffing

Steen.

 

[jleaman]

Id love to see brian make a simple Regulated board WIth the psu board all in one. : O ) Also i was noted that we could use digi's boards for this too : O )

J'

 

[steenoe]

short descpiption of balanced and unbalanced inputs and the pro's and con's .

Short version, pro: Balanced input only amplifies the incomming signal, and rejects everything else. Cons: none AFAIK, soundwise. (Otherwise there is, cost and so on) Unbalanced, industry standard. Not that bad This is religous
territory

Steen.

 

[steenoe]

Id love to see brian make a simple Regulated board WIth the psu board all in one.

You are right To make it simple in the spirit of these amps, why not scissor out the zener regulator, including capacitance multiplier, from the ZenV4? I have used it on several occasions with very good results. If there was any hum from the supply, it totally disappeared after implementing that simple regulator Furthermore, a big Mosfet is a rugged device that can take some beating I think a LM338 will raise the white flag before a hefty IRF device does

Steen.

 

[BrianDonegan]

It will probably put me in the dog house (3 amp projects at once), but I'm gonna have to get in on this as well...

 

[jleaman]

AHH the dogie house i love that place it is so quiet and no one to talk to me : O ) i love the couch too : O )

im starting a small spread sheet for this soon to ask brian go start a wikki then we can see how much it is for the boards and how many and ect ect things.

Jason

 

[jleaman]

Still going. Brian is working on a new Power supply board. People still interested in this..

 

[Jean]

Great, two more amps to build

I am in for a dual mono set, whenever this is ready

p3a, doz, lm3876, aleph2, aleph-x (will probably never finish), ksa-50 and now mini-a i am crazy.

 

[metalman]

I'm in for a dual mono set too!