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Old 16th September 2013, 08:31 AM   #10111
massimo is offline massimo  Italy
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Quote:
Originally Posted by nezbleu View Post
I don't think 1837s are film and foil. They are metallized film. I have been trying to find some Wima FKPs for this because they are film and foil.

That said, the Vishays are very good and have a great reputation.
Correct. The Film&Foil Vishay belongs to the KP1830 series, but while you can find the 15nF, 47nf doesn't exist. Same for Wima's Film&Foil FKP2 5mm pitch, which can be green (NOS) or red (new production).
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Old 16th September 2013, 08:44 AM   #10112
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The Kemet R73 are film/foil and have great treble, compared to Vishay MKP. Kemet is the company that acquired Rifa. The Rifa PFR (foil) series can still be bought from Mouser, but you have to play with the search to find them because they aren't entered into the site correctly.
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Old 16th September 2013, 09:10 AM   #10113
Salas is offline Salas  Greece
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Maybe a a compact size raw DC rail filter added in the phono box sitting between the umbilical and the channels DC input connectors can bring benefit beyond some passive parts details.

Of course a very balanced design between isolation performance and low output impedance is Keantoken's. Recommended for a before & after test to the handier Folded Simplistic near future builders.
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Old 16th September 2013, 12:29 PM   #10114
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Originally Posted by Salas View Post

Of course a very balanced design between isolation performance and low output impedance is Keantoken's.
What is Keantoken's (phono stage)?
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Old 16th September 2013, 12:33 PM   #10115
Salas is offline Salas  Greece
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Its a capacitance multiplier DC rail filter. Look at his signature ink.
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Old 16th September 2013, 01:24 PM   #10116
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Quote:
Originally Posted by Salas View Post
Maybe a a compact size raw DC rail filter added in the phono box sitting between the umbilical and the channels DC input connectors can bring benefit beyond some passive parts details.

Of course a very balanced design between isolation performance and low output impedance is Keantoken's. Recommended for a before & after test to the handier Folded Simplistic near future builders.
Do you mean using the capacitance multiplier before the Salas Shunt, or instead of it?
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Old 16th September 2013, 01:37 PM   #10117
Salas is offline Salas  Greece
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The DC input connectors on the FS PCB are the shunt regulators inputs. Any filter between them and the main PSU box umbilical consists DC pre-filtering. A filter does not regulate, only follows its DC input plus some insertion drop. Different jobs.
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Old 16th September 2013, 02:19 PM   #10118
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Thanks.
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Old 16th September 2013, 04:24 PM   #10119
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what exactly do we want to suppress ? charging pulse .. HF garbage ?

THX
Paul
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Old 16th September 2013, 05:15 PM   #10120
Salas is offline Salas  Greece
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Whatever it can be produced in the rectification or it can intrude the long power cabling.

In my prototype I could not make it catch a GSM phone buzz and I never trimmed its TPs again not noticing intermittent noises, neither a tonal nor an image shift, since I closed its lid in August. That is stock with basic PSU as it is described in the guide.

This does not mean that other builders will not aspire to more elaborate main PSUs or will not want to try some add on filter, whatever.
Freedom of personalized packaging and configuration, favorite passive parts etc. is part of the joy of building DIY audio.
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