Salas SSLV1.3 UltraBiB shunt regulator

[Salas]

Here's an outline of how I would do it, to suit conditions local to me, while accounting for the advice and supporting info provided by Salas in Post #1.

For a small transformer (I've referred to some vendor data for a toroid), the regulation / sag at load is significant. For the assessment attached, I've not added any margin or other factors.

Keep in mind that in bridge rectification with smoothing capacitor the transformer is at 62% of its AC secondary current rating for DC current delivery

http://www.hammondmfg.com/pdf/5c007.pdf

 

[astromo]

Salas - thanks. Useful. I'll revise my estimate.

 

[coldice005]

Thanks

 

[SomeGeoffGuy]

This regulator looks pretty awesome! Are these boards available somewhere? I would like to try one as a 24V DC supply for a Korg B1 in an integrated amp.

Thank you.

-Geoff

 

[Marra]

This regulator looks pretty awesome! Are these boards available somewhere? I would like to try one as a 24V DC supply for a Korg B1 in an integrated amp.

Thank you.

-Geoff

I can recommend it. one powers my B1 korg.

Send Teabag a PM.

 

[Tea-Bag]

I can recommend it. one powers my B1 korg.

Send Teabag a PM.

Currently out, but sign up in spreadsheet in my signature, and sign up for GB thread.
https://www.diyaudio.com/forums/group-buys/322596-gb-salas-sslv1-3-ultra-bib-new-post.html

 

[Tea-Bag]

I can recommend it. one powers my B1 korg.

Send Teabag a PM.

There are few out there I think powered by L-adapters if the UBIB looks too difficult or paranoid of drilling. I cannot speak for the sound difference. I have heard the off the shelf B1K.

 

[SomeGeoffGuy]

I can recommend it. one powers my B1 korg.

Send Teabag a PM.

Currently out, but sign up in spreadsheet in my signature, and sign up for GB thread.
https://www.diyaudio.com/forums/group-buys/322596-gb-salas-sslv1-3-ultra-bib-new-post.html

Sounds good. I will get on the list.


-Geoff

 

[aguaazul]

I need a ‘floating’ power supply. That is a supply not referenced to ground.
24 volts.

Can I use just 1 + Ultra BiB @ 24v or do I need both a positive 12v and a negative 12v BiB to make this work?

Thanks for your help!
Aguaazul

 

[altsouza]

Hi @salas,

I am geting about 400ma current from Ubib. The transformer is 50w 20v and the DC output is 14v. The R1 is 0,8 Ohms
Is that correct or am I doing something wrong??

Thanks

Antonio

 

[Salas]

Hi @salas,

I am geting about 400ma current from Ubib. The transformer is 50w 20v and the DC output is 14v. The R1 is 0,8 Ohms
Is that correct or am I doing something wrong??

Thanks

Antonio

400mA is your loading or ccs? To confirm the ccs setting measure voltage across the 0.8 Ohm resistor's legs and divide by 0.8. 100-150mA higher ccs than load max is more than ok to have.

 

[Salas]

I need a ‘floating’ power supply. That is a supply not referenced to ground.
24 volts.

Can I use just 1 + Ultra BiB @ 24v or do I need both a positive 12v and a negative 12v BiB to make this work?

Thanks for your help!
Aguaazul

Single 24V is good. Has its own bridge and transformer secondary. If you don't reference it to ground with some wire, its floating.

 

[altsouza]

400mA is your loading or ccs? To confirm the ccs setting measure voltage across the 0.8 Ohm resistor's legs and divide by 0.8. 100-150mA higher ccs than load max is more than ok to have.

Sorry for the bad formulated question. When applying 20v (50w toroid)and getting 20v dc, using a 0,8 R1, shouldn’t am I measuring 750ma in my multimeter? But I am reading only 400ma!
Thanks

 

[Salas]

You should be reading 0.6V (or about so) across legs of the 0.8 Ohm R1 to derive 750mA i.e. 0.6V/0.8Ω=0.75Α. On what measuring point you read 400mA?

 

[altsouza]

You should be reading 0.6V (or about so) across legs of the 0.8 Ohm R1 to derive 750mA i.e. 0.6V/0.8Ω=0.75Α. On what measuring point you read 400mA?

Sorry, I am newbie. I am reading 400ma in the dc output. (Is this measurable?)
Thanks
Antônio

 

[Salas]

The DC output is the regulator's output. To read mA there you should have a load connected and a meter in current mode (series) also connected in between. That would be the load's consumption in mA.

 

[Salas]

Just read DC Voltage between R1's legs. If it is near 0.6V your CCS setting is alright, as you expect it.

 

[altsouza]

Just read DC Voltage between R1's legs. If it is near 0.6V your CCS setting is alright, as you expect it.

One probe in one leg and other probe to other, correct? (Newbie)
Thanks

 

[Salas]

Yes, and with digital meter's switch at DCV

 

[altsouza]

Yes, and with digital meter's switch at DCV

Thanks. I got 0,55v. I think is all right.