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hv shunt notes

Posted 6th April 2010 at 04:00 PM by klewis
Updated 19th November 2010 at 03:34 PM by klewis

updated schematic
http://www.diyaudio.com/forums/power...ml#post2084348

Lets see, for 20v use 1n4060 or 4061, for 24v 1n4062 and 36v 1n4066.

Saw the datasheets, nice Zeners. Thanks.

Here we go then. Not just any Zener, but 1N40XX Microsemi temperature compensated components, are to be preferred by shunt builders if they can get their hands on them. Noise concerns by possible wrong Zener choices addressed

v1.0 with LEDs LED's Green 2v

capacitors Panasonic TS-HA

transformer
They go around 62V after rectification in practice, like being 2X22V, still need a 10R resistor before cap, and they don't lose easily, very good regulation. If the 2X18V 80VA model goes 2X19V in reality, it would be best for about 53-54V and to avoid the resistor.

They're the R-Cores sold by audiophonics, The one pictured is from France,...
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Rating: 2 votes, 5.00 average.

Synergy "Active" Crossover

Posted 6th April 2010 at 01:38 PM by wintermute (Wintermutes Rantings)
Updated 5th January 2011 at 03:18 AM by wintermute (fixed a couple of typos, and added a small amount of clarification.)

Following on from YARPS I thought I would post the design I have been working on for my active crossover (which is in fact is what the YARPS power supply was designed to drive).

So here I present the Synergy "Active" Crossover. Please note I have only simmed it at this stage (and when I started I knew nothing about active filter design) so there is no guarantee it will work.

Why have I put "Active" in quotes? Because whilst this filter uses active components, for all intents and purposes it behaves like a passive filter. It basically emulates either an LC or a CL passive 2nd order filter.

Why the name Synergy? Well I though it was the best word to describe the differing technologies working together to give the end result

The design goal is to have an active crossover that for all intents and purposes is transparent. That is it does nothing other than split the frequencies at the desired crossover point....
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Old

duncan amps PSU designer

Posted 1st April 2010 at 01:56 PM by klewis
Updated 28th August 2010 at 03:41 PM by klewis

http://www.duncanamps.com/psud2/index.html

Bill's post on LCL power supply approach: post #1108
http://www.diyaudio.com/forums/power...lator-111.html
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my blog with live.com sharing my hi-fi tweaks...

Posted 30th March 2010 at 01:51 PM by takkiechu

http://hi-fiplanet-888.spaces.live.com/?lc=15369

You guys may download an article which I've put down tweaks for sharing with all audiophiles.

http://cid-d48d1ea0d5766c81.skydrive...uments?lc=1033
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cordells bias spreader

Posted 30th March 2010 at 03:05 AM by klewis

see post 519,520

http://www.diyaudio.com/forums/solid...altrak-52.html
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music and equipment reviews

Posted 29th March 2010 at 09:28 PM by klewis

hi fi nervana

music reviews, equipment reviews.

M2Tech HiFace USB – jkeny modded | TírNaHiFi.org
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speaker projects

Posted 29th March 2010 at 09:00 PM by MisterTwister
Updated 29th March 2010 at 09:14 PM by MisterTwister

I decided to consolidate most of my projects in one page. Twisterspeakers DIY loudspeaker projects
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Ohms Law Calculator

Posted 29th March 2010 at 04:02 PM by klewis

http://www.sengpielaudio.com/calculator-ohmslaw.htm
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Calculate for resistors in Parallel

Posted 29th March 2010 at 03:58 PM by klewis

http://www.sengpielaudio.com/calculator-paralresist.htm
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DAC End 2

Posted 29th March 2010 at 02:33 AM by quanghao
Updated 29th March 2010 at 03:16 AM by quanghao

INTRODUCTION

After the good result obtain with the DAC End I have design with Nguyen Quang Hao a set of boards to create a cheaper project with a sonic performances very near.

The No Oversampling DAC give a more natural sound but if you ear the TDA1541 and TDA1543 seem to lose details.

The AD1865N-K with passive I/V give a perfect combination, natural sound and all the details.

The AD1865N-K give the better performances with a 200ohm MK132 Caddock as passive I/V.

In this configuration the output signal is too low to drive any amplifier so I have design for the AD1865N-K the better output stage.

This DAC use a single ended vacuum tube amplifier without the expensive output transformers used in my original DAC End.

The DAC board follows the original design but has been inserted a jump to switch the phase of output signal.

In any vacuum tube stage the signal on the anode is in out phase...
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