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Old 17th March 2013, 11:56 AM   #3841
Alex M is offline Alex M  United Kingdom
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Quote:
Originally Posted by Salas View Post
Its the latter. A "snubber" or Zobel network more precisely. Voltage drop across that resistor will be insignificant because it just poses "ESR" there. That capacitor has all of it across in essence. The values are critical enough and better not be altered unless someone optimizes damping for a specific load evaluating with lab gear. In general its a little wonder how this design interfaces with so many people's stuff without a multitude of major drama stories. One thing is I don't push the spec too far on purpose, it could be impressive to have 1/3 the now Zo and 3x the now bandwidth, but it would not be generally easy to get widely applied with simple means and no deeper understanding effort. There is a point of diminishing returns subjectively also, so its a juggling act to make a useful general purpose solid state HV shunt reg with some field success. Until now it seems serving the goals rather satisfactorily is my impression. The main purpose is to bring good tonality regulation in compact space with better damping for little money and weight VS iron clad traditional passive filtering cells. A rail hum killer with added value and good sonics in other words.
Thanks - that makes sense.

Alex
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Old 17th March 2013, 01:03 PM   #3842
euro21 is offline euro21  Hungary
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Originally Posted by stajo View Post
.. DN2540 CSS and the shunt mosfet on the same sink..
This is my #26 preamp SSHV2 regulator.
250V input, 220V/ 5.5+5.5 mA output (cCCS are 20mA).
Heat sink about 45 degree Celsius (after 4-5 hour).
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Old 23rd March 2013, 04:03 PM   #3843
stajo is offline stajo  Sweden
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Goodafternoon. Before I solder away, is it S+/S0 that makes one twisted pair and F+/F0 that makes the other, according to recommendation?
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Old 23rd March 2013, 04:07 PM   #3844
AndrewT is offline AndrewT  Scotland
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What does S+ represent?
Once I have that I should be able to work out the other three.
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Old 23rd March 2013, 04:19 PM   #3845
massimo is offline massimo  Italy
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S for Sense and F for Force (Vout) I guess
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Old 23rd March 2013, 04:20 PM   #3846
AndrewT is offline AndrewT  Scotland
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Originally Posted by stajo View Post
.......... is it S+/S0 that makes one twisted pair and F+/F0 that makes the other,..........
Yes.
All flow and return pairs must be close coupled.
And that includes ON the regulator PCB and ON the Receiver PCB.
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Old 23rd March 2013, 04:30 PM   #3847
stajo is offline stajo  Sweden
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Originally Posted by massimo View Post
S for Sense and F for Force (Vout) I guess
Correct. Usually its only plus (signal, hot,) and minus (return, cold) that shall be twisted in general application, but I'm not sure what Salas recommended here.
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Old 23rd March 2013, 04:38 PM   #3848
stajo is offline stajo  Sweden
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Thanks Andrew. Needed some moral support
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Old 23rd March 2013, 05:08 PM   #3849
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Originally Posted by stajo View Post
Thanks Andrew. Needed some moral support
S0 & F0 soldered togheter at the load S+ & F+ soldered togheter at the load.
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Old 5th April 2013, 01:34 PM   #3850
Alex M is offline Alex M  United Kingdom
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Default My SSHV2: a photo

As promised, here is a photo of the two SSHV2 regulators installed in my RTP3.

There is a definite advance in stability and presence over the (probably malfunctioning) HPHV regs they replaced.

Alex
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