Recent Posts

Pages: « 1 2 3 4 5 6 7 8 9 10 »
81
Other DACs / Re: Marantz 94 mark 2
« Last post by brenden on November 30, 2017, 11:51:59 PM »
Vitavox picked  up  the diode changes  in an earlier  post  . On this board I have only done one lot  so far .There three lots of power supply diodes  and i have done this to other machines before and will eventually  get the treatment..  You are probably  wondering  why the huge diodes ?
  Well ,they are hexfreds ultra fast soft recovery (with the soft recovery part being the important bit )  and the ones I have used from different manufacturers  like Harris HFA   and international rectifier types  sound similar . The  ones I used in my first machine   way back  were the hfa08tb60   from memory they were in a smaller package  and the legs had to be bent  heavily to get them in .So i gave the big ones a try and they sounded just as good  but the legs , being  much  wider made it much easier and neater  to fit .i cant recall which ones these are probably the hfa 15  or 25    way over rated  😊.  I did compare to shotkey  diode way back but preferred  the hexfred .I thought the shotkey diodes lost somerhing on the top end  sort of like a treble cut in comparison .Some people  like them but i prefer the Hexfreds . These diode replacements  will reduce hash   and  are another welcome improvement . Like i said before  , its the cumulative gains that get you there  .
82
Tubes / Re: Warning eBay's Global Shipping Program
« Last post by stevenvalve on November 30, 2017, 10:28:15 PM »
Did anyone else used to enjoy as a young kid playing with mercury from a broken thermometer? I certainly did. It was magic the way you could break it into little spheres and then join it back again. (I guess my parents didn't know about minimata!)
Rab now i understand why you have this almost maniacal HiFi obsession. I now see the cause 
83
Tubes / Re: Warning eBay's Global Shipping Program
« Last post by rab on November 30, 2017, 08:29:53 PM »
Did anyone else used to enjoy as a young kid playing with mercury from a broken thermometer? I certainly did. It was magic the way you could break it into little spheres and then join it back again. (I guess my parents didn't know about minimata!)
84
Other DACs / Re: Marantz 94 mark 2
« Last post by brenden on November 30, 2017, 04:46:45 PM »
Another very important upgrade is the  6800uf cap in front of the two main filter caps  .
     The cap  Marantz  used is a lower grade Elna  cap  with steel leads , but is used to filter the critical  digital circuit . I used the 6800uf  Elna  Starget here too .they have a beautiful rich but clear sound  and is bypassed underneath with a copper foil  polystyrene  .01uf.  This is way better than the stock cap  with a very noticable  lift in sound  quality.  Again , had to do some  mucking around to fit this much larger size cap into this spot including moving a resistor to the underneath  of  the  player.
  The two  Jupiter  copper foils   are bypassing  the  main  filter  caps  ,giving a rich ,natural liquid  sound   .Big improvement.
85
Other DACs / Re: Marantz 94 mark 2
« Last post by brenden on November 30, 2017, 04:14:05 PM »
The cap to the left is actually a beautiful Elna 6800 uf   35v big Starget . Wonderful caps . This is in parallel with the two silmics on the clock . I used a  resin capacitor clamp  Again , a very tight fit .
    The size  and the quality of the capacitance  is extremely important  here . It makes a big difference  over the standard  clock .  I ended up using  Jupiter  copper foil .01 for bypasses  which sounded best there but  auricaps  would have been good too .
   The clamp is a snug fit around the capacitor but not too tight so I can slide it out  if I want to work on the clock  without  unsoldering .
86
Other DACs / Re: Marantz 94 mark 2
« Last post by brenden on November 30, 2017, 04:00:29 PM »
Here is a better  view of  the clock mounting .
   I screwed  two  solid brass standoffs  that had to  be extended a bit to get the exact length .
    The clock board  is very strong and rigid  so it sits suspended above the marantz pcb toward  the front of the  player . Some of these jobs are very finniky and time  consuming but worth the effort .
  It had to be just above the marantz  pcb but leave enough room  for  the  larger caps to fit under the  lid so the standoffs had to be measured perfectly .

87
Tubes / Re: Warning eBay's Global Shipping Program
« Last post by vitavoxdude on November 30, 2017, 03:23:51 PM »
Well as it appears tubes started off an earlier life as a lamp, why not get them labeled electric light bulb?  As others have mentioned strip lights or flourscent tubes contain mercury and they are shipped all over the world.  A very frustrating experience all round I would say and utterly STUPID when their excuse is a third parties brainless activity.  This all smells of the safety gestapo, but at least the gestapo could exercise a modicum of decency and common sense unlike how the bought media portrayed them to bias us against all things German post wars.
88
Other DACs / Re: Marantz 94 mark 2
« Last post by brenden on November 30, 2017, 01:42:03 PM »
I have boxed in the Duelund output capacitors underneath the player . There  isn't  enough  room  to fit them inside . To  access underneath I simply need to unscrew the box section .the caps are affixed to the  inside of box with double sided tape with some insulation over the caps and on the  cd base plate.
   None of this can be seen unless your eyesight is level with the underneath  of the player .
    This will be improved once modding is finnished with better and shorter wire and neater insulation .
   I cut a small slot in the baseplate  for the wires  so the base plate can be removed without unsoldering wires .
  The wires tuck in neatly to the space at the end of the box   once fitted .
  The box was the lid part of an electronic  box from Jaycar . Perfect for this application .
89
Other DACs / Re: Marantz 94 mark 2
« Last post by brenden on November 30, 2017, 12:19:29 PM »
Moving along . The player has been converted  to non oversampling  using  99.999 annealed silver wire in teflon tube.  Also added a couple of copper foil pps  .01 bypasses  closer to the chip 
     Attached photo .
90
Tubes / Re: Warning eBay's Global Shipping Program
« Last post by zenelectro on November 28, 2017, 10:36:29 AM »

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

The problem with Vaccines and many other Pharmacetical based treatments is there are a lot of ve$ted interests and they are very big companies. So you never really
know if you are getting accurate information because it may not be in line with large corps bottom lines!

The whole American health system was turned on it's end earlier last century when certain oil tycoons got involved. The rest is history.
http://www4.dr-rath-foundation.org/THE_FOUNDATION/history_of_the_pharma_cartel.html

If you've got time, 4 part series: Dr Suzanne Humphries.

<a href="http://www.youtube.com/watch?v=SFQQOv-Oi6U" target="_blank">http://www.youtube.com/watch?v=SFQQOv-Oi6U</a>
<a href="http://www.youtube.com/watch?v=pYUj26bRNoo" target="_blank">http://www.youtube.com/watch?v=pYUj26bRNoo</a>
<a href="http://www.youtube.com/watch?v=QzqPrSnaqbc" target="_blank">http://www.youtube.com/watch?v=QzqPrSnaqbc</a>
<a href="http://www.youtube.com/watch?v=oUmS5OIRzU4" target="_blank">http://www.youtube.com/watch?v=oUmS5OIRzU4</a>

T
Pages: « 1 2 3 4 5 6 7 8 9 10 »