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Simplistic NJFET RIAA
Simplistic NJFET RIAA
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Old 28th November 2008, 10:48 AM   #351
nicoch58 is offline nicoch58  Europe
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from my friend thomas that have ucd-zenv9 and truepath

the ucd are the worst , v9-truepath in the same league.

this summer I play music with 35C my friend with Klimo NO
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Old 28th November 2008, 10:53 AM   #352
Salas is offline Salas  Greece
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Thanks! Very informative.
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Old 28th November 2008, 11:22 AM   #353
jonners is offline jonners  United Kingdom
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I used to have Tripath TA104s, but I prefer the UcDs (HG version, with regulators). Haven't heard ICE though.
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Old 28th November 2008, 12:23 PM   #354
nicoch58 is offline nicoch58  Europe
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I dont' see TA0104 on 41hz

ucd are good too
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Old 28th November 2008, 07:27 PM   #355
Salas is offline Salas  Greece
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Quote:
Originally posted by jonners
The shunt is basically the one below,
Is that a Chinese kit diagram? It reminds me the drawing style of some valve amp from there, that was overheating on UK mains and had a buzz. We fixed it up on a thread not very long time ago. Also is that a shunt Mosfet on output but portrayed as a transistor symbol?
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Old 28th November 2008, 08:28 PM   #356
jonners is offline jonners  United Kingdom
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Correct!
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Old 28th November 2008, 08:42 PM   #357
RCruz is offline RCruz  Switzerland
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Quote:
Originally posted by nicoch46
http://www.audiodesignguide.com/ClassD/classD.html

I have tre amp , there is a lot difference ,but you pay what you hear
Hi

What is a tre amp ?

Ricardo
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Old 28th November 2008, 08:46 PM   #358
RCruz is offline RCruz  Switzerland
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Quote:
Originally posted by salas


I auditioned the Simply Kitsch Shunt by the way, and it is marvelous as the Vbe one, but I think it may is a bit more open in the highs. Must listen more to confirm.

Click the image to open in full size.
Hi Salas

Awesome work... does it perform much better than your previous version (without the leds) ?

Lee is already working in the salas reg pcb..... Should I call his attention on this matter ?

Regards

Ricardo
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Old 28th November 2008, 08:47 PM   #359
Salas is offline Salas  Greece
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Hey Ricardo, your friend Lee keeps you on the wait. Where is the PCB?

Jokes aside, the Led Kitsch Shunt only sounds a bit more open in the highs, but I am not quite sure. The problem with it is that you must measure each Led's Vdrop so to know the total and calculate the Rset correctly. Led makes vary. Green ones are more alike with each other but not across makers. The previous one is based on steady transistor Vbe. Also the left hand side 2SK on the Kitsch is not lending it self for more than 40V across it and its noise and dissipation are on the 40V border for a 36V Reg, 43V in PSU. So it is not that DIY friendly or free for higher B+ high gain Riaa versions as the first one. I would say that a really good 220-470uF Cout, is more critical for sound than the Vbe or Led reference. Do as you please.
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Old 28th November 2008, 09:34 PM   #360
Thomo is offline Thomo  United Kingdom
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I am struggling for time to get everything done. My components business is picking up and taking more of my time. I will endeavor to get the board finished as quickly as possible, Ricardo.

Salas, how do you think your shunt reg compares to something like the sulzer reg in this circuit? I briefly had a go at using a sulzer but couldn't get it to output 24v, maybe I need a higher voltage vref. I do think I'll use the Salas Shunt though, as it's tried and tested here and it'll also be nice to have the complete Salas phono package.

Regards, Lee.
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