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Salas SSLV1.3 UltraBiB shunt regulator
Salas SSLV1.3 UltraBiB shunt regulator
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Old 16th June 2018, 10:30 PM   #241
sontero is offline sontero  Italy
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Hi Mr. Salas
I have a very simple request.
I would like to use the new shunt on the M.Rotacher MoFo amplifier in its Big declination to deliver about 2.5A continuous on a 24V-DC voltage.
It's possible ?
With which precautions?

I have already built several shunts on your projects with great satisfaction.
Reflektor-D for my DAC
DCB1 and others.
Naturally, in previous situations I did not need high currents.
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Old 17th June 2018, 02:16 AM   #242
Salas is offline Salas  Greece
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Salas SSLV1.3 UltraBiB shunt regulator
How much is the peak to peak current that amp will ask for max signal output?
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Old 17th June 2018, 08:41 AM   #243
sontero is offline sontero  Italy
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Quote:
Originally Posted by Salas View Post
How much is the peak to peak current that amp will ask for max signal output?
the Mofo is an amp source follower in class A that has no gain and is loaded by a large inductance on the source. The maximum current is set at 2.5A and B + 24V.
the schematic in attachement
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File Type: png MoFo schematic.png (33.7 KB, 528 views)
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Old 17th June 2018, 04:35 PM   #244
Salas is offline Salas  Greece
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Salas SSLV1.3 UltraBiB shunt regulator
Anyways with IRF9640 M1 & IRF640 M2 it may do it. The burden is on M1 that will burn the voltage drop across the reg times the CCS setting constantly. That will be 15W if set at 3A assuming 5VDC across. M2 has it better with a high bias Class A amp as load because it will just burn the excess while the amp will pull the heavy part. You will see the reg's LEDS blink if the CCS is set low for the amp's needs with some speaker on peaks. Start with R1 0.22R 5W for circa 2.7A CC. Use a sink for M1 & M2 that will be at ease with at least 20W constantly.
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Old 17th June 2018, 04:53 PM   #245
sontero is offline sontero  Italy
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Quote:
Originally Posted by Salas View Post
Anyways with IRF9640 M1 & IRF640 M2 it may do it. The burden is on M1 that will burn the voltage drop across the reg times the CCS setting constantly. That will be 15W if set at 3A assuming 5VDC across. M2 has it better with a high bias Class A amp as load because it will just burn the excess while the amp will pull the heavy part. You will see the reg's LEDS blink if the CCS is set low for the amp's needs with some speaker on peaks. Start with R1 0.22R 5W for circa 2.7A CC. Use a sink for M1 & M2 that will be at ease with at least 20W constantly.
Good !!
many Thanks Salas
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Old 17th June 2018, 06:19 PM   #246
Salas is offline Salas  Greece
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Salas SSLV1.3 UltraBiB shunt regulator
Watch where the main current goes when you will be setting it up though. You would either need a 100W 10R dummy load (sinked power resistor) or the amp itself hooked up because 65W will dissipate on M2 (24V @ 2.7A) frying it if there is no way out for the bulk of that bias!
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Old 22nd June 2018, 10:48 AM   #247
Marra is offline Marra  United Kingdom
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Salas SSLV1.3 UltraBiB shunt regulator
Is there a substitute for the Kingbright led's? tia.
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Old 22nd June 2018, 03:10 PM   #248
Manolo47 is offline Manolo47  Puerto Rico
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Default Received Board yesterday.. have some BOM questions..

Thanks Teabag!

So this is for my Ba-3 line stage build, so my output voltages are +24v and -24V.

Current output I do not know, but shouldn't it be less than 1A?

First question, well CC current needed in the B-a3 circuit?

And btw what does CC stand for? Current.....and the other C?

Rs,Cx and Cs recommended?

And in the positive and negative parts descriptions there are references to IRF9610, IRF9530, and IRF610 and IRF530. Is this so? I want to be sure this is not a typo.

Thanks!
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Old 22nd June 2018, 03:14 PM   #249
Tea-Bag is offline Tea-Bag  United States
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Salas SSLV1.3 UltraBiB shunt regulator
Quote:
Originally Posted by Marra View Post
Is there a substitute for the Kingbright led's? tia.
The kingbright are consistent if their vf. Reds are 1.8v
The Kingbrighht greens are slightly higher at 1.9v

If your running for a goal of 5V, I know Salas recommends the red LEDS, as they have a lower Vf. The kingbright ones are all rated at 20ma.
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Old 22nd June 2018, 03:17 PM   #250
Salas is offline Salas  Greece
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Salas SSLV1.3 UltraBiB shunt regulator
Quote:
Originally Posted by Marra View Post
Is there a substitute for the Kingbright led's? tia.
http://ie.farnell.com/broadcom-limit...om%20red%20led

P.S. The above low power one says is consistent at circa 2mA (our circuit's working conditions territory). Same brand 6000 series measured best noise in member's "gerhard" noise tests. It might also prove sensitive for reliability because low power though? I don't know.
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