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91
Tubes / Re: Warning eBay's Global Shipping Program
« Last post by gamve on November 27, 2017, 07:32:11 PM »
We are living in a stupidly imbalanced society. I reckon its like living in an insane asylum run by criminal sociopath narcissists. The ridiculous rules and regulations that are made by groups of committees end up having no common sense at all. We see it all the time. Turn on the 6:30pm horror movie tonight to see how ridiculous this asylum is. Although if i start expecting it to be crazy I dont get as depressed with the whole thing.

I have a differing view on vaccines. They have taken the mercury (Thiomersal) out of them now... I think. Yes they can have negative side effects as do all medicines and drugs legal or not but these are measured for ongoing safety using new tools such as vaxtracker. https://www.vaxtracker.net/ Theres always lots more work to do of course to keep the pharmaceutical companies in line as they are purely profit driven and are a pack of bastards. But NSW health are well aware of that and work hard to keep on top of the situation. The side effects of large groups of societies not having vaccines readily available are much worse than the side effects of modern vaccines. http://www.independent.co.uk/news/health/measles-deaths-europe-outbreak-vaccination-mmr-who-unacceptably-tragedy-italy-romania-mmr-anti-a7836581.html
The stupidity and bad rep comes out with idiotic government bureaucrats trying to force people to vaccine their kids by denying them their entitled benefits. Now thats just blackmail and is ridiculous. We dont need it. It needs to be a 100% free choice and I personally believe the benefits of vaccines stand alone and people dont need to be blackmailed. If people dont want them thats totally cool. It should be a choice. As long as most of the 'herd' are vaccinated their shouldn't be outbreaks of vaccine preventable disease.


Mercury is the second most toxic substance to humans on the planet only beaten by plutonium. The fcuker who started to put this into medicine should have been strung up by the balls.

Thimerisol was removed from vaccines for children some time ago and so it should have been the dose was 350 times the allowable limit for drinking water. But never fear big pharma will make sure you get your dose. People get the flu vaccine and not only is it ineffective (read the bloody studies before you start on me) it makes a lot of older weaker people sick as dogs from the mercury poising from the THIMERISOL they use in the Vaccine.....Go Figure. Ok I will explain. The Thimerisol is used to stop cross contamination of needles being inserted then removed multiple times from a bulk vaccine container. The reason they do this is it actually costs approximately 3 cents more per dose to do each dose individually. Big Pharma save money by poising there customers with Ethyl Mercury rather than losing 3 cents per dose!!!

Can somebody remind me of the epidemics that have killed thousands of children all in one go in the last 30 years...there have been none. No not an outbreak of measles that effected 30 kids at Disneyland that the media were paid to have a field day with.
What do you think causes the 1 in 66 Autism rate of today?  In the 80's the Autism rate was 1 in 10000? What has changed? When I was a kid I had roughly a dozen vaccinations. American kids have something like 70 Vaccinations before they leave school. These are some of the sickest kids on the planet. Big Pharma has another 300 vaccines currently in development. I'm pretty sure they have not even invented the diseases they cure yet.

In Australia Our Prime Minister makes and passes legislation that if your kids are not vaccinated they can not attend schooling.
His wife sits on the board of directors of a Pharmaceutical company....WTF
92
Tubes / Re: Warning eBay's Global Shipping Program
« Last post by brenden on November 27, 2017, 05:06:56 PM »
Fluorescant tubes all contain  mercury .  So do they ban them ?
93
Tubes / Re: Warning eBay's Global Shipping Program
« Last post by onthebeach on November 27, 2017, 03:39:23 PM »
We are living in a stupidly imbalanced society. I reckon its like living in an insane asylum run by criminal sociopath narcissists. The ridiculous rules and regulations that are made by groups of committees end up having no common sense at all. We see it all the time. Turn on the 6:30pm horror movie tonight to see how ridiculous this asylum is. Although if i start expecting it to be crazy I dont get as depressed with the whole thing.

I have a differing view on vaccines. They have taken the mercury (Thiomersal) out of them now... I think. Yes they can have negative side effects as do all medicines and drugs legal or not but these are measured for ongoing safety using new tools such as vaxtracker. https://www.vaxtracker.net/ Theres always lots more work to do of course to keep the pharmaceutical companies in line as they are purely profit driven and are a pack of bastards. But NSW health are well aware of that and work hard to keep on top of the situation. The side effects of large groups of societies not having vaccines readily available are much worse than the side effects of modern vaccines. http://www.independent.co.uk/news/health/measles-deaths-europe-outbreak-vaccination-mmr-who-unacceptably-tragedy-italy-romania-mmr-anti-a7836581.html
The stupidity and bad rep comes out with idiotic government bureaucrats trying to force people to vaccine their kids by denying them their entitled benefits. Now thats just blackmail and is ridiculous. We dont need it. It needs to be a 100% free choice and I personally believe the benefits of vaccines stand alone and people dont need to be blackmailed. If people dont want them thats totally cool. It should be a choice. As long as most of the 'herd' are vaccinated their shouldn't be outbreaks of vaccine preventable disease.

94
Other DACs / Re: Marantz 94 mark 2
« Last post by brenden on November 27, 2017, 01:14:59 PM »
Hi Zen  , its Non over sampling .
95
Other DACs / Re: Marantz 94 mark 2
« Last post by zenelectro on November 27, 2017, 10:53:19 AM »
Ian,

Nice work. Quick question - Are you running digital filter or 0 x OS?

T
96
Other DACs / Re: Marantz 94 mark 2
« Last post by brenden on November 27, 2017, 03:45:38 AM »
Here are the  tda1541 chips  with  the Panasonic pps copper foil capacitors
97
Other DACs / Re: Marantz 94 mark 2
« Last post by brenden on November 27, 2017, 02:23:46 AM »
Here is a photo of the  big cap beside the clock  module held in place by a resin capacitor  clamp on ths base of the 94 .
98
Other DACs / Re: Marantz 94 mark 2
« Last post by brenden on November 27, 2017, 01:54:58 AM »
This is the clock with integrated  power  supply   all caps replaced  one by one and assessed . Mostly Silmic 2 super golds  but Silmic 2 standards very good too.  Bypassed with Jupiter copper foils  and  pps copper foil caps  This lowered the  subjective noise floor immensely . I also added a couple  of film caps very close to the active  devices underneath .

  The Silmics are much better than the supplied panasonics and philips caps
   Not shown is a larger cap in parallel with the  power supply  . I think from memory 4700 uf  elna for audio . The two 1000uf caps are just not enough for the clock .Much better  sound with the bigger
   capacitance .   The clock power supply needs to be as noise free as possible and very reactive  .so dont skimp on .01 bypasses .  Dont  use mylar here .

  What seems to be most important here is to get the power supply to the clock as noise free as possible   .noise means jitter .  Jitter means loss of fidelity .
    Would love to try a Zen clock here one day Terry . ☺



Here is also a photo of the  new Valab clock  with original capacitors   .
99
Other DACs / Re: Marantz 94 mark 2
« Last post by zenelectro on November 26, 2017, 10:18:58 PM »
Great question Steve ,and one i have wrestled wit a lot . I owned both at the same time and compared them side by side . Firstly the mk2 had a bit more weight  . It probably  had  more drive due to the  doubling up of dacs and amplification  stages  in dual differential .
    The mk1 was a bit sweeter  and  and  maybe a bit less grungy . This was almost certainly due to the better film caps around the tda1541 a   even though they werent great caps ( mylar ,   inductive)
     Certainly not optimum .   As you could hear   ( comparatively ) grungy plodding in the mk2  can be  totally fixed .

    I am not 100 pc sure the weight of the  mk1 can be  made to equal the mk2   but certainly could be improved  .
     I think the dual differential architecture is superior  as far as noise and distortion  are concerned  but  the extra room in the mk1 opens up lots of  possible  choices for  even better   exotic decoupling  caps around  the tda1541  and for top line caps the cost will be  halved  needing 14 instead of  28 .
      The caps in the CD12 and CD 7  around the dac were  top quality  non inductive  polypropylene foil types   i believe .   These would be impossible  to  fit on the tiny mk2 board  .I was lucky enough to get a few of those green  pps copper foils for mine ,  but they are no more The only ones I have ever seen are the ones i got .
   The mounting arrangement for the dac board in the mk 2 is also not optimum either  , using steel prongs . This will be the last thing I will do .My last one was hard  wired with Discovery signature  wire .really nice wire and made a clear difference.
     

WRT 94 MKII:

They run dual differential but still do L and R ch in same DAC. So one TDA does L+ R+, other does L- R-.
Would have been better to use 1 x TDA L channel +and- /  other R channel +and- but as they say, it is what it is. :)


They also used 5 opamps / channel in the dual dif configuration which was fairly complex.
Maybe this was to allow for FET switched de-emphasis circuit. I'd be pulling that out.

A simple 3 opamp config with class A opamps is the way to go.

I never tried the AD827 / AD847, however I got great results with OPA627 biased into class A
I recommend biasing them into class A - I have never found an opamp that didn't sound better with class A bias.

But as you say it's all a balancing act. The opamp PS bypass makes a difference too. Some people use double
caps, ie; electro with film cap but I think this gives slight artificial sound. With the 827 / 847 you have to be a
little careful as they are very fast and can oscillate. But it will usually not sound right if this is happening. 

I used to enjoy doing this sort of simple modding to SS gear, it can be a bit maddening at times - this opamp,
that cap, etc etc

Oh and it's also worth trying running the analog OP stage straight off batteries with no regulation.
This can sound really good - if you don't mind being a battery slave..... charge etc  :-X :)

T



100
Other DACs / Re: Marantz 94 mark 2
« Last post by brenden on November 26, 2017, 08:26:38 PM »
Great question Steve ,and one i have wrestled wit a lot . I owned both at the same time and compared them side by side . Firstly the mk2 had a bit more weight  . It probably  had  more drive due to the  doubling up of dacs and amplification  stages  in dual differential .
    The mk1 was a bit sweeter  and  and  maybe a bit less grungy . This was almost certainly due to the better film caps around the tda1541 a   even though they werent great caps ( mylar ,   inductive)
     Certainly not optimum .   As you could hear   ( comparatively ) grungy plodding in the mk2  can be  totally fixed .

    I am not 100 pc sure the weight of the  mk1 can be  made to equal the mk2   but certainly could be improved  .
     I think the dual differential architecture is superior  as far as noise and distortion  are concerned  but  the extra room in the mk1 opens up lots of  possible  choices for  even better   exotic decoupling  caps around  the tda1541  and for top line caps the cost will be  halved  needing 14 instead of  28 .
      The caps in the CD12 and CD 7  around the dac were  top quality  non inductive  polypropylene foil types   i believe .   These would be impossible  to  fit on the tiny mk2 board  .I was lucky enough to get a few of those green  pps copper foils for mine ,  but they are no more The only ones I have ever seen are the ones i got .
   The mounting arrangement for the dac board in the mk 2 is also not optimum either  , using steel prongs . This will be the last thing I will do .My last one was hard  wired with Discovery signature  wire .really nice wire and made a clear difference.
       
     
 
       
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