Very good looking boards NPower... did you etch them yourself ?
With the 56dB you must be very carefull about the TX positioning..... best would be to enclose the TX, rectifiers and smoothers in a shielded box.
Where did you get the silver micas ?
What are those green caps you are using ?
Ricardo
With the 56dB you must be very carefull about the TX positioning..... best would be to enclose the TX, rectifiers and smoothers in a shielded box.
Where did you get the silver micas ?
What are those green caps you are using ?
Ricardo
How performs Cout - Obbligato Cu 3.3uF?
If you can afford better two regs & two psu, one for each channel.
Very good looking boards NPower... did you etch them yourself ?
With the 56dB you must be very carefull about the TX positioning..... best would be to enclose the TX, rectifiers and smoothers in a shielded box.
Where did you get the silver micas ?
What are those green caps you are using ?
Ricardo
Merlin
I don't know how to explain this to, six months ago I started building my first draft of audio, 300b SE Aikido, and during a conversation with my friends they challenged me to build a phono stage for a mutual friend (kind of expert). After some reading I decided to build this, therefore I have no references, only my DAC ( Valab with custom build cables ), my amp (Yamaha) speakers (AE109SE with QED cables). This is far away better than my DAC ( except noise). I don't like to use words like stage, deep, etc, etc ,etc. It's music, it's velvet and I want to dance, so it's good, it's very good ( and I think that I have good ears)
If you look close to the picture you can see a dual shunt PSU with a common rectifier ( fast recovery hexfred's with 3 // 4700hF cap's)
Boa noite Ricardo
Thanks by your kind words.
Yes I etch them by myself ( got some problems with Positive 20 but for now is ok).
For the enclosure I'm thinking in a different approach ( sorry, right now top secret)
Lemco silver micas from here:
0.047UF 200V DC Lemco Silver Mica Capacitors - eBay (item 360166226282 end time Jul-24-10 03:55:10 PDT)
0.016UF 200V DC Lemco Silver Mica Capacitors - eBay (item 360166226156 end time Jul-24-10 03:53:47 PDT)
Green caps brand Lelon RGA series ( I think from Taiwan)
NPower, yes sorry I don't see the dual reg.
Watch the pic: 4 mosfet, two of them clamped to small heatsinks and thus partially hidden, double led arrays, double set of caps, etc.
Follow the wiring: two set of cables going to the Riaa boards coming out from different point of the PS pcb......
Colud be Salas.....
A further test could be to isolate one Shunt Reg (removing CCS Rset + the first led of the array) and listen to one ch. only. Or connect the 2nd Riaa board to the same Shunt Reg if it can deliver the extra current.
I would solve my noise problems in a cheap box first. The gain you got can give -110dB ref 1V 0dB in its worse lows region if executed properly. You don't listen to its full now with some noise, only a portion.
Hello guys
For test purposes I get one DVD player box, so everything will go inside ( except trafo), after that, Massimo advise to see if I can make them quiet.
I will post later
@massimo
@Salas
That's helps NPower, let us know NPower?
That's for sure !!
I think that already saw this
Salas
Saw this one on eBay, any comments ?
BHL Audio JFET Phono Preamplifier kit - 2sk170 RIAA - eBay (item 230498727963 end time Aug-12-10 11:25:01 PDT)
Brgds
Salas
Saw this one on eBay, any comments ?
BHL Audio JFET Phono Preamplifier kit - 2sk170 RIAA - eBay (item 230498727963 end time Aug-12-10 11:25:01 PDT)
Brgds
Saw this one on eBay, any comments ?
That phono is based around Le Pacific circuit. Salas further improved it. No comparison at all.
P.S. the author stated: This is not a DIY copy of a commercial product
and moreover: use a mid-grade switch mode wall wart power supply for this because they are cheap, easy, and very quiet
No comment!
Salas
can I use your schematic with Ortofon VMS20 Ortofon VMS 20 Owners Manual, Service Manual, Schematics, Free Download | Vinyl Engine
can I use your schematic with Ortofon VMS20 Ortofon VMS 20 Owners Manual, Service Manual, Schematics, Free Download | Vinyl Engine
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