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Old 3rd February 2012, 09:31 PM   #941
bkdog is offline bkdog  Australia
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Default A nice looking build

manamanam, what are you powering with the regs? i'm asking because it looks like something I was about to start...
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Old 3rd February 2012, 09:37 PM   #942
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B2 + legato 3 (Tridents ?)
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Old 4th February 2012, 06:35 AM   #943
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bkdog, acidbrain,

Yes, it's BII with Tridents + Legato 3.
If this is your case, here's a small tip for Legato. Because Salas regs performance is so high, local decoupling capacitors can block the regs from reaching their full potential.
In my case, i'm not using the balanced to single ended converter and buffer section and i could safely remove the 100mF decoupling capacitors from the balanced I/V secton. I haven't tested thourouly, so i cannot tell about stability if you do the same to the BAL to SE and buffer chip.
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Old 4th February 2012, 10:20 AM   #944
bkdog is offline bkdog  Australia
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Quote:
Originally Posted by manamanam View Post
bkdog, acidbrain,

Yes, it's BII with Tridents + Legato 3.
If this is your case, here's a small tip for Legato. Because Salas regs performance is so high, local decoupling capacitors can block the regs from reaching their full potential.
In my case, i'm not using the balanced to single ended converter and buffer section and i could safely remove the 100mF decoupling capacitors from the balanced I/V secton. I haven't tested thourouly, so i cannot tell about stability if you do the same to the BAL to SE and buffer chip.
Yep, I'm thinking of a BIII and a Legato 3 etc. Thanks for the tip on the decoupling cps, it would have taken me a little to trek that down....
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Old 4th February 2012, 10:22 AM   #945
AndrewT is online now AndrewT  Scotland
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I don't agree that good regulator performance allows automatic omission of client circuit decoupling.
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regards Andrew T.
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Old 4th February 2012, 11:14 AM   #946
Salas is offline Salas  Greece
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Extra ripple and noise filters like RC yes, special chip decoupling parts is another story.
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Old 5th February 2012, 01:14 AM   #947
alazira is offline alazira  United States
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Quote:
Originally Posted by RCruz View Post
I also used BHC caps until I heard Jensen 4 poles.... these are fast, transparent and provide uge resolution inthe high freqs.
Hi,
How do you use a 4-pole cap on this PCB?
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Old 5th February 2012, 03:11 AM   #948
Salas is offline Salas  Greece
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You don't if you won't hack it with a hobby knife. He talks matrix board or direct wiring.
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Old 5th February 2012, 07:42 PM   #949
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Exclamation 45Vout help

I want to make a reg for my simplisitics njfet riaa that needs +45Vout, tx used is a R-Core dual secondary 2x18VAC so 36VAC, for Vref I used 6K8 for R303 a 5K trimmer & two red LEDs and mosfets as per BiB guide, dummy load is a Caddock MP820 heavily sinked 100R so 20W. Vref LEDs don't lit, CCS LEDs all lit, Vout 0VDC, I measured the VACat the input of the reg with the dummy load connected at the output of the reg DVM reads 39VAC, I need to reduce the input VAC to 36VAC as per BiB guide?

Last edited by merlin el mago; 5th February 2012 at 07:45 PM.
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Old 5th February 2012, 07:45 PM   #950
Salas is offline Salas  Greece
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You choked it with 100R. 1000R for 45mA load test.
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