SSLV1.1 builds & fairytales - Page 95

bkdog · 3rd February 2012, 09:31 PM

manamanam, what are you powering with the regs? i'm asking because it looks like something I was about to start...

acidbrain · 3rd February 2012, 09:37 PM

B2 + legato 3 (Tridents ?)

manamanam · 4th February 2012, 06:35 AM

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.

bkdog · 4th February 2012, 10:20 AM

Quote:

Originally Posted by manamanam

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....

AndrewT · 4th February 2012, 10:22 AM

I don't agree that good regulator performance allows automatic omission of client circuit decoupling.

Salas · 4th February 2012, 11:14 AM

Extra ripple and noise filters like RC yes, special chip decoupling parts is another story.

alazira · 5th February 2012, 01:14 AM

Quote:

Originally Posted by RCruz

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?

Salas · 5th February 2012, 03:11 AM

You don't if you won't hack it with a hobby knife. He talks matrix board or direct wiring.

merlin el mago · 07:45 PM

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?

Salas · 5th February 2012, 07:45 PM

You choked it with 100R. 1000R for 45mA load test.

3rd February 2012, 09:31 PM	#941
bkdog diyAudio Member Join Date: May 2005 Location: in a house	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...

5th February 2012, 07:42 PM	#949
merlin el mago diyAudio Member Join Date: Sep 2009 Location: Catalonia new Europe state	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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3rd February 2012, 09:37 PM	#942
acidbrain diyAudio Member Join Date: May 2008	B2 + legato 3 (Tridents ?)

4th February 2012, 06:35 AM	#943
manamanam diyAudio Member Join Date: Jun 2009 Location: Athens	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.

4th February 2012, 10:22 AM	#945
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	I don't agree that good regulator performance allows automatic omission of client circuit decoupling.

4th February 2012, 11:14 AM	#946
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Extra ripple and noise filters like RC yes, special chip decoupling parts is another story.

5th February 2012, 03:11 AM	#948
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	You don't if you won't hack it with a hobby knife. He talks matrix board or direct wiring.

5th February 2012, 07:45 PM	#950
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	You choked it with 100R. 1000R for 45mA load test.