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Salas SSLV1.3 UltraBiB shunt regulator
Salas SSLV1.3 UltraBiB shunt regulator
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Old 16th September 2020, 10:54 AM   #2321
Salas is offline Salas  Greece
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Salas SSLV1.3 UltraBiB shunt regulator
Since there are C1 C2 1000uF on each BA3pre channel I wonder if there is some condition created during start up. How long are the rail cables from PSU to BA3pre board, and is there any length difference between pos & neg in your build?
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Old 16th September 2020, 06:02 PM   #2322
ichiban is offline ichiban  United States
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Salas SSLV1.3 UltraBiB shunt regulator
Since there are C1 C2 1000uF on each BA3pre channel I wonder if there is some condition created during start up. How long are the rail cables from PSU to BA3pre board, and is there any length difference between pos & neg in your build?



Lengths are about the same, 3 inches max (7cm).
Turn on s have been normal the last few days.
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Old 16th September 2020, 06:05 PM   #2323
Salas is offline Salas  Greece
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Salas SSLV1.3 UltraBiB shunt regulator
What is the function of those two polysterene capacitors?
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Old 16th September 2020, 06:28 PM   #2324
ichiban is offline ichiban  United States
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Salas SSLV1.3 UltraBiB shunt regulator
Input to ground, to shunt high frequency garbage to ground.

Thinking the input from the ESS9038/Mercury may have

hifreq noise.
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Old 22nd September 2020, 05:06 PM   #2325
stew1234 is online now stew1234  United States
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Salas SSLV1.3 UltraBiB shunt regulator
Salas, I was looking at the UltraBIB type 1.3S you designed for higher voltage with the phono pre. I am planning to use regular 1.3 ultrabibs likely at 28v or 38v to power an output stage (100ma-180ma output most likely).

Is there anything I should keep in mind running them at higher voltage?
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Old 22nd September 2020, 06:19 PM   #2326
Salas is offline Salas  Greece
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Salas SSLV1.3 UltraBiB shunt regulator
There is increased time of Vout settling in the higher range. Only that. If Vout drift is not crucial to your application there is nothing to worry about. For the specific phono the Vout drift was moving along its input stage JFETs drift and that was annoying for setting its test point faster. That is why I specialized its reg version. I shortened its Vo range to the upper part only.
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Old 23rd September 2020, 06:36 PM   #2327
stew1234 is online now stew1234  United States
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Salas SSLV1.3 UltraBiB shunt regulator
I had to desolder a C1 cap to use elsewhere and in the process took up part of the copper tracing on the inside of the right-most cap pin. As long as the new cap pin is fully soldered to the bottom of the board should this be fine?

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Old 23rd September 2020, 10:49 PM   #2328
Salas is offline Salas  Greece
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Salas SSLV1.3 UltraBiB shunt regulator
You should check with the DMM's continuity buzzer if that pin still makes contact to the parts it should on the schematic
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Old 24th September 2020, 01:48 PM   #2329
stew1234 is online now stew1234  United States
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Salas SSLV1.3 UltraBiB shunt regulator
Thanks. I will probably try to find a replacement eyelet I can solder to the top of the board first and then install the new cap. Given the thickness of the boards and the capacitor pins I doubt I can get solder to flow to the top of the pad when soldering from the bottom.
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Old 25th September 2020, 11:19 AM   #2330
ForsbackaKalle is offline ForsbackaKalle  Sweden
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Hi! Have ordered a Salas Ultrabib triplet to source a Soekris DAM 1921. (same as DAM1941 but with 2 ladders)
It needs +-5V 45mA Max for ladders and +5V 350mA Max for digital. Have also ordered minikits for triplet. Then I need transformers. I have read the general info. Seems 9volt AC is suitable but what VA or current ratings for ladders and Digital?
Will also need some resistors for suitable CC coupling. Advise?
Is there other components I need for replace current PS? Caps?
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Last edited by ForsbackaKalle; 25th September 2020 at 11:25 AM.
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