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   Home » Melquiades Amplifier » 6 Channel Version of Super Melquiades (132 posts, 7 pages)
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  »  New  Super Melquiades Amplifier...  About the Super Melquiades Bass....  Melquiades Amplifier  Forum     29  188938  07-16-2005
  »  New  Fun with transformers?..  Re: An amplifier is not a subject but a service.....  Melquiades Amplifier  Forum     7  66227  10-21-2005
  »  New  Building Melquiades: Chronicle of full-range..  VR2 issue leading to jump in current on 6C33 tube...  Melquiades Amplifier  Forum     44  254244  06-09-2006
  »  New  5 Channel Version of Melquiades..  Very easy....  Melquiades Amplifier  Forum     21  169191  07-23-2006
  »  New  RAAL “Water Drop” tweeter for Macondo...  Your comment takes me by surprise...  Horn-Loaded Speakers Forum     77  675887  02-16-2007
  »  New  The one-stage Melquiades...  Tubes vs. Speakers vs. FR...  Melquiades Amplifier  Forum     73  465295  04-21-2007
  »  New  The single-stage Milq and power Supplies...  Just the tank...  Melquiades Amplifier  Forum     10  64860  05-03-2007
  »  New  A DSET is better then an expensive SET..  DIY Stradivarius...  Audio For Dummies ™  Forum     41  254153  09-21-2007
  »  New  Amplification and Consciousness...  Freedom of expression vs. something to say...  Playback Listening  Forum     15  75634  01-07-2008
  »  New  My (Amplification + Acoustic System): what is next?..  Macondo and Melquiades in the NEW room....  Audio Discussions  Forum     41  207130  01-10-2008
  »  New  All Active! A DSET and multi-way acoustic system...  Hahaha...  Audio Discussions  Forum     14  81439  01-31-2008
  »  New  The Melquiades' "Remote Biasing"..  The Melquiades' "Remote Biasing"...  Melquiades Amplifier  Forum     0  14753  02-05-2008
  »  New  A proper implementation of low-pass filters..  Low Pass...  Melquiades Amplifier  Forum     4  33833  02-18-2008
  »  New  Incorporating active crossovers into DSET..  Thanks...  Melquiades Amplifier  Forum     2  30413  07-22-2008
  »  New  Single-stage Melquiades vs. DHT amps..  A hallucination?...  Melquiades Amplifier  Forum     397  2597940  11-22-2008
  »  New  If you’re multiamping then use passive-line lever cross..  Crossover and DSET?...  Audio For Dummies ™  Forum     3  37217  01-21-2009
  »  New  The DSET perspective examines the Herb Reichert article..  Are you still in Reutlingen, Germany?...  Melquiades Amplifier  Forum     5  68321  07-01-2009
  »  New  Training amplifiers..  The Milq's demands for burning...  Melquiades Amplifier  Forum     16  81746  03-20-2006
  »  New  Think ahead how to measure the DSETs gain...  The calibration mode is for DSETs not for SET....  Audio For Dummies ™  Forum     2  19015  09-17-2009
  »  New  Amplifiers heat… a real-estate solution?..  I have seen this simular concept...  Melquiades Amplifier  Forum     1  15445  09-18-2009
  »  New  About DSET-driven multi-way acoustic system maintenance..  About DSET-driven multi-way acoustic system maintenance...  Horn-Loaded Speakers Forum     0  18216  11-01-2009
  »  New  Thomas Mayer’s Triamp..  It is much more then juts "properly calculated and...  Melquiades Amplifier  Forum     2  25893  03-03-2010
02-02-2008 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,545
Joined on 05-28-2004

Post #: 126
Post ID: 6538
Reply to: 6537
Nope, it's just digital so far.

 Paul S wrote:
What are you using for pre-amp chores?

Have you tried phono sources yet?

I do not use analog for now, since my preamp is being rebuilt, I hope I will have it back this week. Well, I was listening today the life MET’s broadcast of Die Walküre with Lorin Maazel conducting (it was very good BTW) but it was as much “analog” as I can afford now. The New Milq DSET is 5K load and very complex load, my phonostage can’t drive it. My 7788 phonostage is around 1K output impedance and the “End of the Live Phonostage” is about 300R. They are both capacitance-coupled with 2uF… My digital on the other hands can handle the New Milq. Bidat has 40R out impedance, Lavry is somewhere there as well, and the Pacific is 20R. Ether of them drives the bid Milq with no problems.

The caT


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
07-02-2009 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,545
Joined on 05-28-2004

Post #: 127
Post ID: 10965
Reply to: 6422
The 6-Ch Melquiades DSET full circuit updated
fiogf49gjkf0d
 Romy the Cat wrote:

Here are the basics of the 6-Chennal Melquiades DSET Amplifier complete, without secondary features.

http://www.RomyTheCat.com/PDF/6-Chennal_Melquiades_DSET_Amplifier.pdf

The pre-final version of the 6-Ch Melquiades DSET if modified from former version to embrace the DHT double-stager for MF, HF modification, changes in power supplies and a few other minor changes. Still, am looking for bugs on the drawing before I convert it into a final PDF format.

6-Chennal_Melquiades_DSET_Amplifier_Rev3.jpg




"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
12-08-2014 Post does not mapped to Knowledge Tree
anthony
Posts 193
Joined on 08-18-2014

Post #: 128
Post ID: 21381
Reply to: 10965
Upperbass crossover
fiogf49gjkf0d
Romy, I appreciate that this is an old thread now and that you may not remember everything from your time developing these amplifiers, but I have a (hopefully) simple question about the upperbass crossover in the schematic above.  All other channels have crossovers that are rather straight forward: bass is a low pass RC filter; Fundamentals is a RCL bandpass filter; MF is RL high pass filter; HF is a third order T Section high pass filter; but the Upperbass Channel as I read it is a RC low pass filter only (bandpass is required) within the first stage bias.  Are you relying on the coupling cap (0.022uF) to act as your high pass filter for Upperbass? 

Regards,

Anthony

PS: I am a newcomer to amplifier circuits, but several things have fallen into place reading through your site, and I much appreciate your efforts in making this all public.
12-08-2014 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,545
Joined on 05-28-2004

Post #: 129
Post ID: 21382
Reply to: 21381
The Milq upperbass crossover.
fiogf49gjkf0d
 anthony wrote:
Romy, I appreciate that this is an old thread now and that you may not remember everything from your time developing these amplifiers, but I have a (hopefully) simple question about the upperbass crossover in the schematic above.  All other channels have crossovers that are rather straight forward: bass is a low pass RC filter; Fundamentals is a RCL bandpass filter; MF is RL high pass filter; HF is a third order T Section high pass filter; but the Upperbass Channel as I read it is a RC low pass filter only (bandpass is required) within the first stage bias.  Are you relying on the coupling cap (0.022uF) to act as your high pass filter for Upperbass? 
 
Yes, Anthony, the upperbass crossover is bandpass. The filters that is integrated with bias is low pass with voltage divider (effectively a resistor) and cap to ground. This filter squeeze the range from 500Hz and above.  Generally using this filter the upperbass that I have (Fane Studio 8M in 36" Tratrix)  and in context presents of Fundamental Channel is now a good idea as Fane will drive HF too much over this very shallow filter. However, it would be the care of passive filters and the inductance of Fane would compromise the filter. My filter is line-level filter and even if I use a series indictor (I would not use it as I like subtraction filters that I use all over Milq) then the indictor will not "see" the speaker coil. Ideally I would like to see in there slightly sharper crossover at upper knee. I did experiment in there a second order and it was too not bad. However, on the long run I felt that the slower filter would be more suitable. I think if we were talking about rock-n-roll-type crap then probably I would stick to second order. Anyhow, as you said, the coupling cap is high pass, unloading the unwanted LF from the horn. It is controversial if a second order would be better choice for this high pass. I can argue both sides. In context of my relatively large room I do not think it is practically critical.


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
06-10-2015 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,545
Joined on 05-28-2004

Post #: 130
Post ID: 21696
Reply to: 4973
Super Milq 6 channels diaries: 8 years later.…
fiogf49gjkf0d
Last night I push the pedal on my left channel Milq and it was no invents. I tested the voltage and it was up, the fuses are also in place and operational. So, I presume that my left Milq is sick, probably something in PS section. That sucks at so many levels! Since the fuses are alive I presume that the pulse relay that serve the pedal went down… I can express how much I do not have time to deal with it….
 


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
06-11-2015 Post does not mapped to Knowledge Tree
rowuk


Germany
Posts 229
Joined on 07-05-2012

Post #: 131
Post ID: 21699
Reply to: 21696
Alligator clips will do in a pinch....
fiogf49gjkf0d
Many things in life are solvable by short circuiting them.


Whenever I feel blue, I start breathing again.
08-06-2017 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,545
Joined on 05-28-2004

Post #: 132
Post ID: 23358
Reply to: 4973
The first Milq screw up.
I am looking at my posts at the forum and am trying to figure out when the 6-ch Milq as made. I think it was during the late 2007 beginning of 2008. Well, the Super Melquiades then is 10-year-old then…. 
 
One way or another I got my first screw up a couple of week back. A local guy to listen my playback and informed me that my right tweeters is not working. It was working 2 weeks before but not then. It took for a while to figure out the it was the fault of my assembling. The FH filter, a big and bulky was soldered to a contact of the step attenuator and was left is a stressed position. The gravity over the years broke down the soldered connection and the filter just lost the connection with the signal path. A good lesson. 
 
The interesting part is that I have noted that somehow, I have HF deficiency but since I know that nothing change I attributed my feeling to sleep deprivation or sonic paranoia… At the very same time I was shocked how stunning Macondo suddenly begin to image. They all are very connected things…


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
Page 6 of 6 (132 items) Select Pages:  « First ... « 2 3 4 5 6
   Target    Threads for related reading   Most recent post in related threads   Forum  Replies   Views   Started 
  »  New  Super Melquiades Amplifier...  About the Super Melquiades Bass....  Melquiades Amplifier  Forum     29  188938  07-16-2005
  »  New  Fun with transformers?..  Re: An amplifier is not a subject but a service.....  Melquiades Amplifier  Forum     7  66227  10-21-2005
  »  New  Building Melquiades: Chronicle of full-range..  VR2 issue leading to jump in current on 6C33 tube...  Melquiades Amplifier  Forum     44  254244  06-09-2006
  »  New  5 Channel Version of Melquiades..  Very easy....  Melquiades Amplifier  Forum     21  169191  07-23-2006
  »  New  RAAL “Water Drop” tweeter for Macondo...  Your comment takes me by surprise...  Horn-Loaded Speakers Forum     77  675887  02-16-2007
  »  New  The one-stage Melquiades...  Tubes vs. Speakers vs. FR...  Melquiades Amplifier  Forum     73  465295  04-21-2007
  »  New  The single-stage Milq and power Supplies...  Just the tank...  Melquiades Amplifier  Forum     10  64860  05-03-2007
  »  New  A DSET is better then an expensive SET..  DIY Stradivarius...  Audio For Dummies ™  Forum     41  254153  09-21-2007
  »  New  Amplification and Consciousness...  Freedom of expression vs. something to say...  Playback Listening  Forum     15  75634  01-07-2008
  »  New  My (Amplification + Acoustic System): what is next?..  Macondo and Melquiades in the NEW room....  Audio Discussions  Forum     41  207130  01-10-2008
  »  New  All Active! A DSET and multi-way acoustic system...  Hahaha...  Audio Discussions  Forum     14  81439  01-31-2008
  »  New  The Melquiades' "Remote Biasing"..  The Melquiades' "Remote Biasing"...  Melquiades Amplifier  Forum     0  14753  02-05-2008
  »  New  A proper implementation of low-pass filters..  Low Pass...  Melquiades Amplifier  Forum     4  33833  02-18-2008
  »  New  Incorporating active crossovers into DSET..  Thanks...  Melquiades Amplifier  Forum     2  30413  07-22-2008
  »  New  Single-stage Melquiades vs. DHT amps..  A hallucination?...  Melquiades Amplifier  Forum     397  2597940  11-22-2008
  »  New  If you’re multiamping then use passive-line lever cross..  Crossover and DSET?...  Audio For Dummies ™  Forum     3  37217  01-21-2009
  »  New  The DSET perspective examines the Herb Reichert article..  Are you still in Reutlingen, Germany?...  Melquiades Amplifier  Forum     5  68321  07-01-2009
  »  New  Training amplifiers..  The Milq's demands for burning...  Melquiades Amplifier  Forum     16  81746  03-20-2006
  »  New  Think ahead how to measure the DSETs gain...  The calibration mode is for DSETs not for SET....  Audio For Dummies ™  Forum     2  19015  09-17-2009
  »  New  Amplifiers heat… a real-estate solution?..  I have seen this simular concept...  Melquiades Amplifier  Forum     1  15445  09-18-2009
  »  New  About DSET-driven multi-way acoustic system maintenance..  About DSET-driven multi-way acoustic system maintenance...  Horn-Loaded Speakers Forum     0  18216  11-01-2009
  »  New  Thomas Mayer’s Triamp..  It is much more then juts "properly calculated and...  Melquiades Amplifier  Forum     2  25893  03-03-2010
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