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Old 26th July 2012, 05:00 PM   #2561
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I couldn't hear any difference with running the SALAS Shunt Reg at currents above 300mA. In the end I opted for 160mA (ish), the MOS-FETs run cool and there is no danger of component cooking.

Irrelevant of the current the PSU is consuming, the B1's run at about 7-10mA each (determined by the Idss of the 2SK170BLs).

The 2E heatsinks run at a nice cool 30 degrees at 200mA but start to heat up rapidly above 300mA.
You will notice that I opted to use the SALAS Reg Supply part of the DCB1 but then used the B1 itself. I needed the capacitive coupling so the combination of the two suited my application perfectly.
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Last edited by KatieandDad; 26th July 2012 at 05:17 PM.
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Old 26th July 2012, 05:17 PM   #2562
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You will notice that I opted to use the SALAS Reg Supply part of the DCB1 but then used the B1 itself. I needed the capacitive coupling so the combination of the two suited my application perfectly.
Since I'll be running my setup in balanced mode, DC will not be an issue for me. But yeah, I agree with you, whatever suits your equipment need is what you should go for!

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Old 29th July 2012, 07:47 PM   #2563
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is worth to have separates regulator for right and left rails on B1 ?
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Old 29th July 2012, 07:53 PM   #2564
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Small subjective gain.
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Old 4th August 2012, 10:27 PM   #2565
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I do not understand 21 V into 10 ohm resistors and 10 V out from supply and I can not feel any temperature rise at all.
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Old 4th August 2012, 11:04 PM   #2566
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That's very good sinking for 200mA or less. Have you got 1.6-2V voltage drop on the 10 Ohm resistors? If yes you surely run spec current. Maybe you can double up on them and drop them to 5 Ohm so to benefit from more current since you got nice dissipation bond to chassis.
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Old 4th August 2012, 11:28 PM   #2567
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Yes 1,6 V across 10 ohm. I will follow your advice and use 2 more 10 ohm resistor.

What abuot the 10 V output ? Short circuit one Led in each side ?
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Old 4th August 2012, 11:37 PM   #2568
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Why? +/-10V is the spec.
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Old 5th August 2012, 04:36 AM   #2569
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Oki I thought 12 V .
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Old 23rd August 2012, 10:45 AM   #2570
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Hello.I build dc coupled b1 preamp very simple, without regulators and potentiometer.I used 12volts empty 23AE type batteries(they measure about 10,5volts when empty)I used 100uf 10v rubycon za capacitors,dale hi end military resistors on pcb(i heard that rubycon za is very similar to rubycon blackgate caps)Buffer sounds excellent!Thanks Salas and Nelson for B1 buffer.
I matched 1% drain current with 9v batteries.Drain current is about 9,09ma for all fets.
I want to connect a battery for it,because i like battery for sound.Clean DC.Can i use +-12 volts lead acid battery with series resistors?Or maybe 9v lead acid batteries?Thank you
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