SSLV1.1 builds & fairytales - Page 105

AndrewT · 15th April 2012, 12:31 PM

I much prefer higher value resistors soldered in parallel. The original DCB1 could accommodate six //Rs for each CCS.
Then it is cheap and easy to increase CCS current by adding extra resistors and no de-soldering required. If the heat proves to be too much, then that last addition can be snipped off.

How does voltage regulator sense work into some other manufacturer's product?

TheShaman · 15th April 2012, 12:33 PM

I agree.
It'd be a good idea to have provisions on the PCB for installing resistors in parallel.

Siberia · 17th April 2012, 11:41 AM

I want to use SSLV 1.1 for feeding 28VDC to my future Pearl II RIAA. Getting a 2x24 R-Core, I would get around 26VAC on my Tx secondaries because of local mains, and 26 X 1.33 = 34,5VDC after rectification. Is it enough for an extra voltage? Or are two 2x15 R-Cores recommended for bigger DCin?

AndrewT · 17th April 2012, 11:46 AM

No.

How many times does it need to be repeated that the Salas Style Regulator needs >=7V across the CCS?

Siberia · 17th April 2012, 12:05 PM

I'm aware what's written in the guide. It says, at least extra 5V, but 7-10V recommended. The reason I'm asking this because i get <7V across, but with two 2x15 I would get into 45VDCin, which may be too much for cooling it down. All I wat to know which way is prefered.

Salas · 17th April 2012, 01:36 PM

Burn as much as you want on a CRC pre filter so you have control and extra filtering? Longer pants have always the better chance to get cut to measure.

AndrewT · 17th April 2012, 01:42 PM

Quote:

Originally Posted by Siberia

7-10V recommended. The reason I'm asking this because i get <7V across,.........

Have you checked what DC voltage with ripple voltage superimposed that will appear at the regulator power input when the mains voltage swings over the range from maximum supply to minimum supply?

It is the voltage amplitude at the minima due to the ripple that determines the worst case Vin at the regulator.

Siberia · 17th April 2012, 02:41 PM

Quote:

Originally Posted by AndrewT

Have you checked what DC voltage with ripple voltage .

No.

I admit that I don't know the maths behind it, but would love to know how you do it.

Explaining that it's

Quote:

Originally Posted by AndrewT

voltage amplitude at the minima due to the ripple that determines the worst case Vin at the regulator

is not enough for my knowledge level. Sorry.

Then I just realised that I would better use Pear II, omitting onboard regulator and feeding it with 24VDC of SSLV 1.1 Tx 2x24VAC is about right then for the purpose.

Tea-Bag · 17th April 2012, 02:47 PM

Siberia, I am using 2 x 24v transformer with Pearl2 onboard reg removed.

Siberia · 17th April 2012, 03:08 PM

OT. Quick question. I'm planning to remove U1, U2, and to replace them with 10R resistances making an additional CRC filter. I would connect shunt. reg. after this filter. Is that the way yours is made?

15th April 2012, 12:33 PM	#1042
TheShaman diyAudio Member Join Date: Jan 2007 Location: Crete	I agree. It'd be a good idea to have provisions on the PCB for installing resistors in parallel. __________________ "You have a hierarchy: a mathematician, a physicist (which is a failed mathematician), and an engineer (which is a failed physicist)." - Andrew Jones

17th April 2012, 02:47 PM	#1049
Tea-Bag not politcally affiliated diyAudio Member Join Date: Feb 2006 Location: Kennebunk Blog Entries: 7	Siberia, I am using 2 x 24v transformer with Pearl2 onboard reg removed. __________________ Salas Boards 2013 #2 CLICK HERE \| F6 Covertible PCB GB Boards Available \|DCB1 boards and KITS available PM\|SemiSouth R125, R100, R100A Available CLICK HERE \|F5TC Boards Sign UP CLICK HERE

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15th April 2012, 12:31 PM	#1041
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	I much prefer higher value resistors soldered in parallel. The original DCB1 could accommodate six //Rs for each CCS. Then it is cheap and easy to increase CCS current by adding extra resistors and no de-soldering required. If the heat proves to be too much, then that last addition can be snipped off. How does voltage regulator sense work into some other manufacturer's product?

17th April 2012, 11:41 AM	#1043
Siberia diyAudio Member Join Date: Feb 2011 Location: Vilnius	I want to use SSLV 1.1 for feeding 28VDC to my future Pearl II RIAA. Getting a 2x24 R-Core, I would get around 26VAC on my Tx secondaries because of local mains, and 26 X 1.33 = 34,5VDC after rectification. Is it enough for an extra voltage? Or are two 2x15 R-Cores recommended for bigger DCin?

17th April 2012, 11:46 AM	#1044
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	No. How many times does it need to be repeated that the Salas Style Regulator needs >=7V across the CCS?

17th April 2012, 12:05 PM	#1045
Siberia diyAudio Member Join Date: Feb 2011 Location: Vilnius	I'm aware what's written in the guide. It says, at least extra 5V, but 7-10V recommended. The reason I'm asking this because i get <7V across, but with two 2x15 I would get into 45VDCin, which may be too much for cooling it down. All I wat to know which way is prefered.

17th April 2012, 01:36 PM	#1046
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Burn as much as you want on a CRC pre filter so you have control and extra filtering? Longer pants have always the better chance to get cut to measure.

17th April 2012, 03:08 PM	#1050
Siberia diyAudio Member Join Date: Feb 2011 Location: Vilnius	OT. Quick question. I'm planning to remove U1, U2, and to replace them with 10R resistances making an additional CRC filter. I would connect shunt. reg. after this filter. Is that the way yours is made?