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Old 14th December 2011, 12:13 PM   #2141
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So you mean if I use electrolytic cap for C1 and C2....the SSHV1 and SSHV2 board will perform worse than not using the board with regard to transparent in tone??
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Old 14th December 2011, 12:18 PM   #2142
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So do you mean that if I use electrolytic caps for C1 and C2...that the SSHV! and SSHV2 will give less transparent in tone than not using the boards???
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Old 14th December 2011, 12:23 PM   #2143
Salas is offline Salas  Greece
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Using the board is the reg thing. Serves a purpose, given you need a reg. Recommended parts for the reg itself ensure it will perform as intended. If to compromise for economical reasons, do that for C2 only. C1 is more sensitive for ESR as it is a part of a tuned Zobel. Use MKT C1 at least. There are also MKT for C2 maybe economical enough. I suggest you go try a prototype with the economics you can allow, and see if you get it to work properly first. Its regulating ability will show first and you will judge what it brings to your application. If all will go well for you, you may try putting better capacitors on it later.
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Old 14th December 2011, 12:52 PM   #2144
regal is offline regal  United States
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Is there anyway to up the time constant to allow C2 to be decreased. Even decreased to 4.7uf is exponetially more economical and diverse in selection of a film cap that 10uf. At 10uf about the only choice that make sense is a motor-run oil cap. Going below 4.7uf and there are a huge number of choices.
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Old 14th December 2011, 12:58 PM   #2145
AndrewT is online now AndrewT  Scotland
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Build up an experimental version using the cheapest of "normal industrial grade" components.
Get it working !!!!!!
Then listen to what effect it has on sound quality.

After that extended listening session, decide if you want to get embroiled in tuning.
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Old 14th December 2011, 01:06 PM   #2146
Salas is offline Salas  Greece
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Quote:
Originally Posted by regal View Post
Is there anyway to up the time constant to allow C2 to be decreased. Even decreased to 4.7uf is exponetially more economical and diverse in selection of a film cap that 10uf. At 10uf about the only choice that make sense is a motor-run oil cap. Going below 4.7uf and there are a huge number of choices.
Depends on how much PSU noise you can allow in your application. A phono stage is not a low gain line stage, etc. I found 10uF a good spot. Why not parallel 2 4u7 or 3 3u3? For single cap, SCR/Solen has a good compact MKP at 10uF, there are Wima radial, there are also some MKT for cheaper, or even Ebay MKP ''Audiophiler'' thingies at 10uF 400V.
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Old 14th December 2011, 01:12 PM   #2147
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I am going to get some solen .33 and 10uf's and I see how they fit.
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Old 14th December 2011, 01:18 PM   #2148
Salas is offline Salas  Greece
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There are the 250V Solen also if the application uses B+ around 200V.
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Old 14th December 2011, 01:50 PM   #2149
roger57 is offline roger57  Canada
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Default Power Supply Testing, Model and Physical

Hi Salas,

What would be the correct way to load and test the supply? Is a linear resistor really representative of the slightly more complex dynamic load of the tube (Or whatever load) being driven

If LT Spice was used, what would be done there to check the supply output impedance vs frequency?

Thanks!
Gary
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Old 14th December 2011, 04:34 PM   #2150
Salas is offline Salas  Greece
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A linear resistor representing actual load demand is a proper aid to test and set. Mind its dissipation though. Zo Spice sim attached for a 45mA CCS and 15mA load run.
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