Quick question about shunt regs and CCS

lordvader · 18th April 2010, 05:08 AM

Hey all.

I'm currently working on an tube phono stage. Each tube is loaded with a CCS, and I'm using a shunt regulated PSU (one of these ones : HV Shunt Regulator 2009 GB).

My question is, as each tube is using a CCS, will it be to use one shunt regulator feeding four CCS's, or will there be some benefit to using one shunt regulator per channel ?

Also, for that particular shunt reg, how well filtered should the input DC be ? An LC filter ($$$) will have about 0.5V ripple, while an RC will have about 5V ripple (RCRC will have about 0.3V ripple, but more capacitors :P ).

Basically, am I wasting a choke on a filter for a shunt reg ?

pacificblue · 24th April 2010, 08:22 AM

If the shunt regulator is worth its money, there should be no need to use one per CCS. On the other hand, if the CCSs are worth their money, there is no need for a shunt regulator to begin with. There are of course theoretical benefits in providing each CCS with the cleanest voltage it can possibly get. Whether there is an audible benefit depends on how good each of them already is on its own. The question only you can answer is: How far do you want to take it.

The same about the input DC. The very purpose of the shunt regulator is to turn an imperfect input into a smooth voltage. It will of course be easier for it when the input voltage is already smooth. Belts and braces so to say. Whether your ears will benefit from that is unanswerable until you try it. And even if your ears benefit, nobody can tell you beforehand whether you will find it worth the effort in the end.

Gordy · 24th April 2010, 09:08 PM

pacificblue is very right. Personally I would try a cheap RCRCRC then directly to your CCSs. However, if you do insert the shunt regulator you only need one, but give it an easy time with something like RCRC in front of it.

lordvader · 26th April 2010, 12:25 PM

Thanks for the input guys

I'll stick with a single shunt reg, and play around with ideas for the pre filter, trying to find the perfect cost/performance balance (I already have a nice inductor, but will be better suited to a power amp).

18th April 2010, 05:08 AM	#1
lordvader diyAudio Member Join Date: Mar 2002 Location: n/a	Quick question about shunt regs and CCS Hey all. I'm currently working on an tube phono stage. Each tube is loaded with a CCS, and I'm using a shunt regulated PSU (one of these ones : HV Shunt Regulator 2009 GB). My question is, as each tube is using a CCS, will it be to use one shunt regulator feeding four CCS's, or will there be some benefit to using one shunt regulator per channel ? Also, for that particular shunt reg, how well filtered should the input DC be ? An LC filter ($$$) will have about 0.5V ripple, while an RC will have about 5V ripple (RCRC will have about 0.3V ripple, but more capacitors :P ). Basically, am I wasting a choke on a filter for a shunt reg ?

24th April 2010, 08:22 AM	#2
pacificblue diyAudio Member Join Date: May 2008	If the shunt regulator is worth its money, there should be no need to use one per CCS. On the other hand, if the CCSs are worth their money, there is no need for a shunt regulator to begin with. There are of course theoretical benefits in providing each CCS with the cleanest voltage it can possibly get. Whether there is an audible benefit depends on how good each of them already is on its own. The question only you can answer is: How far do you want to take it. The same about the input DC. The very purpose of the shunt regulator is to turn an imperfect input into a smooth voltage. It will of course be easier for it when the input voltage is already smooth. Belts and braces so to say. Whether your ears will benefit from that is unanswerable until you try it. And even if your ears benefit, nobody can tell you beforehand whether you will find it worth the effort in the end. __________________ If you've always done it like that, then it's probably wrong. (Henry Ford)

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24th April 2010, 09:08 PM	#3
Gordy diyAudio Member Join Date: Nov 2006	pacificblue is very right. Personally I would try a cheap RCRCRC then directly to your CCSs. However, if you do insert the shunt regulator you only need one, but give it an easy time with something like RCRC in front of it.

26th April 2010, 12:25 PM	#4
lordvader diyAudio Member Join Date: Mar 2002 Location: n/a	Thanks for the input guys I'll stick with a single shunt reg, and play around with ideas for the pre filter, trying to find the perfect cost/performance balance (I already have a nice inductor, but will be better suited to a power amp).

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