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Tangent Easy Power Supply

post #1 of 15
12/22/03 at 7:48pm
Thread Starter 
Seen on headwize : http://headwize2.powerpill.org/ubb/s...=4526&fdays=20

http://tangentsoft.net/elec/teps/

Not the final PPA PS however.

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post #2 of 15
12/23/03 at 5:02pm
Dammit, Tangent!

As if my pockets weren't empty enough from this PPA project I'm starting, now I have to go and order up the parts for the TEPS, too!

One thing though: I think you should change the name to 'Tangent Power Supply', that way we could do a report on it and it would be a TPS Report.

-Jason
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post #3 of 15
12/23/03 at 6:58pm
Red Swingline stapler not required to assemble this SKU.
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post #4 of 15
12/23/03 at 7:55pm
LOL I love that movie!
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post #5 of 15
12/24/03 at 6:16am
Try not to ground on the secondary side of the power supply. In some cases where a few CD player are grounded will prove fatal.

For example, X brand CD player uses supply voltage of +-15V and grounded 0V.
The PPA 0V is half the voltage of TEPS (Tangent Easy Power Supply), for example 12V reference to ground.

A short circuit is innevitable.
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post #6 of 15
12/25/03 at 4:59pm
Is it possible to use a LM337 in this design (with the appropriate part changes/polarity reversal/etc.) to make a negative regulated supply? I'm looking to build a +/-15V supply. Or am I better off using LT1085/1033 like the Welborne PS1?
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post #7 of 15
12/25/03 at 5:10pm
Quote:
Originally posted by davei
Is it possible to use a LM337 in this design (with the appropriate part changes/polarity reversal/etc.) to make a negative regulated supply? I'm looking to build a +/-15V supply. Or am I better off using LT1085/1033 like the Welborne PS1?
You're better off using the older PS-1 boards for US$5/ piece & dropping LM317T/ 337T reg's in there.
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post #8 of 15
12/26/03 at 4:05am
Quote:
Originally posted by Dreamslacker
You're better off using the older PS-1 boards for US$5/ piece & dropping LM317T/ 337T reg's in there.
Cost is not an issue for me. I'm looking for maximum performance from a relatively simple circuit (i.e. my last resort is buying Jung Super Regular PCBs from Old Colony).
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post #9 of 15
12/26/03 at 10:04am
I'd rather go with the PS-1. The TEPS is not a dual-voltage circuit.
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post #10 of 15
12/26/03 at 12:05pm
Quote:
Originally posted by Dreamslacker
I'd rather go with the PS-1. The TEPS is not a dual-voltage circuit.
the TEPS is designed for use with Tangents PCBs which are all single voltage designs so no need for a dual supply

g
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post #11 of 15
12/26/03 at 12:40pm
Quote:
Originally posted by guzzler
the TEPS is designed for use with Tangents PCBs which are all single voltage designs so no need for a dual supply

g
Yeah.
He wants a +/-15v PSU.
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post #12 of 15
12/26/03 at 12:41pm
Quote:
Originally posted by guzzler
the TEPS is designed for use with Tangents PCBs which are all single voltage designs so no need for a dual supply

g
Yup, I know it's a single voltage supply, but I need a dual so I wanted to know if it would be easy to use the TEPS as a basis for a negative supply I guess some experimentation is in order!
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post #13 of 15
12/26/03 at 1:19pm
With any type of isolated supply, you can take two of them and connect V- on one to V+ on the other like you'd do with a pair of 9V batteries. Each half is a positive regulator, but since they're isolated, the voltages can float anywhere you need them to be; if you strap two of them together, the midpoint is "ground", and the other two rails are V+ and V-. It would work just fine, but the parts cost would be unnecessarily high; you save at least the cost of the second transformer and the board space it takes up if you make a true dual supply. The transformer I use in the TEPS is perfectly capable of driving a pair of regulator circuits if I chose to make it do so, but it I didn't.

And no, you can't go dropping an LM337 into an LM317 board position. The pinouts are different.

I'm tempted to go make a dual-voltage version of the TEPS, but I lack a negative regulator IC to test it with. I guess I could make it use two positive regulators. Does this mightily offend anyone?

EDIT: "Trouble with grammar have I, yes!" -- Yoda
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post #14 of 15
1/5/04 at 4:36am
tangent: I just built a PPA, and since I already have an Elpac from my META42, I didn't get an extra one for the PPA, figuring I'd wait till you guys come up with a custom PPA power supply. But, I noticed that you remarked on a headwize thread:

Quote:
With a PPA, there isn't enough residual noise to tell the difference between an Elpac and batteries with RMAA.
So, if I'm not worried about charging batteries, does this mean there's no performance reason to use the custom or any other power supply over the Elpac?

Btw, the PPA sounds great so far. The bass is truly astounding. Thanks to the PPA team, and especially to tangent for all the wonderful documentation.
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post #15 of 15
1/5/04 at 11:52am
Quote:
does this mean there's no performance reason to use the custom or any other power supply over the Elpac?
No, it just means that RMAA is not the right tool for testing power supplies. It was in response to a request for noise graphs at the output of an amp, as opposed to the existing graphs of noise at the output of the power supply.

Quote:
Thanks to the PPA team
We're glad you enjoy it.
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