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Read the Post in new Window Read the Post in Threaded view  Post #43: Rectifiers by el`Ol on 2007-12-10 
Browse the content of the threads in new Window  Thread: Devid Berning amplifiers: the anti-trnsformers frenzy? in Audio Discussions  45 Replies 
There is one thing I don´t understand:Why is David Berning using masses of low voltage rectifiers instead of one vacuum diode rectifier?By doing this he´s got semiconductors in the signal path....

Read the Post in new Window Read the Post in Threaded view  Post #127: The stupid 5uF cap on AC side by Romy the Cat on 2011-09-02 
Browse the content of the threads in new Window  Thread: The last phonocorrector: “End of Life" Phonostage in Analog Playback  310 Replies 
[quote user="N-set"](feel free to re/move this post to the electricity thread)As the power supply I'd regard everything from the power generator in the power plant down to the actual load.Why the power transformer should be the cutting line? I do hea...

Read the Post in new Window Read the Post in Threaded view  Post #1: The DSET perspective examines the Herb Reichert article. by Romy the Cat on 2009-07-01 
Browse the content of the threads in new Window  Thread: The DSET perspective examines the Herb Reichert article. in Melquiades Amplifier  5 Replies 
The “Enjoy His Music” published the old celebrated by many DIYers Herb Reichert’s article about his 300B amp ideas. http://www.enjoythemusic.com/diy/0709/flesh_blood.htm I read it before but reading it now, after a few years again...

Read the Post in new Window Read the Post in Threaded view  Post #51: The geometry by N-set on 2011-03-19 
Browse the content of the threads in new Window  Thread: Bias help in Melquiades Amplifier  96 Replies 
This is what I try to stick to: Try to create closed magnetic (steel) loops around magnetics. Ideally acompany itwith closed electric (copper) loops. This I think Pieter has done that already for you, but,as Romy impicite suggests, double boxing will...

Read the Post in new Window Read the Post in Threaded view  Post #628: DC vs AC Operation by TonyB on 2010-12-08 
Browse the content of the threads in new Window  Thread: It’s mad, mad, mad... electricity. in Audio Discussions  1910 Replies 
The differences between the battery operation and AC operation are to be expected.One case is isolated (hopefully) from AC, the other case is not. If anybody thinks otherwise,they are fooling themselves.The first question to ask is to MAKE SURE that ...

Read the Post in new Window Read the Post in Threaded view  Post #11: The Bidat DAC in 2008 by Romy the Cat on 2008-01-02 
Browse the content of the threads in new Window  Thread: Summary: my/your audio: year by year in Audio Discussions  45 Replies 
[quote user="Paul S"] a maxed/modded Museatex iDAT-44+ DAC (adapted for battery power; no AC!)[/quote] Yes, Paul it is good that you remind me it as I have been thinking about it for a few years and never put my hands on it. I am not a bit fun of ba...

Read the Post in new Window Read the Post in Threaded view  Post #249: The Loftinish-Whitish, well sort of…. by Romy the Cat on 2009-04-30 
Browse the content of the threads in new Window  Thread: Single-stage Melquiades vs. DHT amps in Melquiades Amplifier  397 Replies 
Yep, it looks, like very close to “it” design-wise.  http://www.studiomaudio.info/loftinwhite.htmlIn the way this amp is one of the manifestations of Loftin-White DC-coupled but it has some own things. The driver stage is the Melquiades Tube to k...

Read the Post in new Window Read the Post in Threaded view  Post #196: Ringing by FJC Corpas on 2012-02-08 
Browse the content of the threads in new Window  Thread: The last phonocorrector: “End of Life" Phonostage in Analog Playback  310 Replies 
Well, I normally use tube rectifier with my LC filters and, I don´t know exactly why, I haven´t had ringing problems at switching. I think could be tubes switch in a gentler way than silicon. I recommend you use an appropriated snubber circuit across...

Read the Post in new Window Read the Post in Threaded view  Post #43: Rectifiers by el`Ol on 2007-12-10 
Browse the content of the threads in new Window  Thread: Devid Berning amplifiers: the anti-trnsformers frenzy? in Audio Discussions  45 Replies 
There is one thing I don´t understand:Why is David Berning using masses of low voltage rectifiers instead of one vacuum diode rectifier?By doing this he´s got semiconductors in the signal path....

Read the Post in new Window Read the Post in Threaded view  Post #21: The stock Bidat’s power supplies. by Romy the Cat on 2008-04-11 
Browse the content of the threads in new Window  Thread: The Museatex Bidat pages. in Didital Things  57 Replies 
[quote user="Alex Yakovlev"]Romy, would you mind elaborating on specifics of your power supply? My Bidat is going to John in a couple of weeks and I am finalizing my thoughts. Thank you.[/quote] I do not have any “specifics of my power supply” as I ...

Read the Post in new Window Read the Post in Threaded view  Post #4: I don't think it's a Cogent system by Wojtek on 2007-09-04 
Browse the content of the threads in new Window  Thread: Cogent+Electronluv+Acapella=Wretched What? in Horn-Loaded Speakers  5 Replies 
It only uses Cogent f.c drivers .Josh Stipich from Electronluv is the designer/maker of horns and amplifiers and Cogent role is secondary (my guess) . Electronoluv aproach is afected by Sakuma designs and using lots of transformers&nbs...

Read the Post in new Window Read the Post in Threaded view  Post #629: The differences between… by Romy the Cat on 2010-12-08 
Browse the content of the threads in new Window  Thread: It’s mad, mad, mad... electricity. in Audio Discussions  1910 Replies 
[quote user="TonyB"]The differences between the battery operation and AC operation are to be expected.One case is isolated (hopefully) from AC, the other case is not. If anybody thinks otherwise,they are fooling themselves. [/quote] Tony, the fact is...

Read the Post in new Window Read the Post in Threaded view  Post #762: Why? by N-set on 2011-02-01 
Browse the content of the threads in new Window  Thread: It’s mad, mad, mad... electricity. in Audio Discussions  1910 Replies 
Romy, I have not been following this thread very much andI'm probably too stupid to understand, but how comes that your power supplies with choke input, tons of quality uF + smart bypassing still make the electricity a concern?If you don't listen to ...

Read the Post in new Window Read the Post in Threaded view  Post #24: R2 by anthony on 2022-01-03 
Browse the content of the threads in new Window  Thread: R22 in Melquiades Amplifier  34 Replies 
R2 gets hot.  I think I mentioned earlier that it will also be hot...it is dropping 250V and running 17ma which is a bit over 4watt.  From memory, that tube should be biased to about 35mA.Bridge recitifiers will only really matter here if you are usi...

Read the Post in new Window Read the Post in Threaded view  Post #208: The horrors of calibration by N-set on 2012-07-14 
Browse the content of the threads in new Window  Thread: The last phonocorrector: “End of Life" Phonostage in Analog Playback  310 Replies 
I'm pathetically slow with my 834 clone, but that's what I am....Sorry for boring you but I treat this threat a bit like a blog on my "progress".I've tried to fight more with PS induced ham and interferenceby putting the PS transformers and HV rectif...

Read the Post in new Window Read the Post in Threaded view  Post #34: D'n'B v2 by N-set on 2011-03-31 
Browse the content of the threads in new Window  Thread: How to get a LOT of SET power. in Audio Discussions  106 Replies 
Here is another, simplified assault after some rethink and PSUD simulations.Rectifier: 3x1.2kV SiC per phase should do the job, actually 2 would do, but I'd preferto be safe. Bridge I don't want, as there would be 6 not 3 diodes switching1750V. 1.2kV...

Read the Post in new Window Read the Post in Threaded view  Post #16: A "better" power supply does not necessarily need to be &quo... by rowuk on 2022-07-23 
Browse the content of the threads in new Window  Thread: CEC TL0-X: by no means an in-depth review in Didital Things  17 Replies 
Depending on the UseCase, many things can influence the sound. Rectifiers, snubbers, impedance, corner frequency, speed, an inductor in series, regulation, isolation from the mains grid all are parameters to consider.I do not know of any really serio...

Read the Post in new Window Read the Post in Threaded view  Post #125: EMI/RFI madness by N-set on 2011-09-02 
Browse the content of the threads in new Window  Thread: The last phonocorrector: “End of Life" Phonostage in Analog Playback  310 Replies 
(feel free to re/move this post to the electricity thread)As the power supply I'd regard everything from the power generator in the power plant down to the actual load.Why the power transformer should be the cutting line? I do hear your voice clearly...

Read the Post in new Window Read the Post in Threaded view  Post #93: This time it has nothing to do with electricity by Romy the Cat on 2008-01-14 
Browse the content of the threads in new Window  Thread: 6 Channel Version of Super Melquiades in Melquiades Amplifier  131 Replies 
[quote user="Paul S"]Romy, isn't this the first time you have tried the film caps for PS and the "ALL-NEW" "SUPER-SOFT" diode bridge?  I would certainly go back to known quantities before I did or un-did anything serious.  Not that I always...

Read the Post in new Window Read the Post in Threaded view  Post #154: My attitude toward tube rectification. by Romy the Cat on 2009-02-07 
Browse the content of the threads in new Window  Thread: Single-stage Melquiades vs. DHT amps in Melquiades Amplifier  397 Replies 
It is only if you chose to employ tube rectification.  Many people claim that tube rectification affects sound greatly in this or that way and they are right, it does. However, it does only because the circuit is designed to be affected by recti...

Read the Post in new Window Read the Post in Threaded view  Post #14: It is purely voluntary, isn’t? by Romy the Cat on 2006-03-20 
Browse the content of the threads in new Window  Thread: To drive the 6C33C... in Melquiades Amplifier  65 Replies 
[quote user="guy sergeant"] I've usually found valve rectifiers to sound preferable. [/quote] For HF channels only. Still with shaft switch diodes and properly implemented input choke filters there is not advantages of tube rectification, quite oppo...

Read the Post in new Window Read the Post in Threaded view  Post #6: The floating transforms & chokes in PS? by Romy the Cat on 2006-08-18 
Browse the content of the threads in new Window  Thread: Stands for Super Melquiades. in Melquiades Amplifier  6 Replies 
Interesting, I had a prolong conversation last night with Kevin Tellekamp of the Silent Running Audio and we discussed my case. He proposed that the reason why my imaging was changed was due to the Super Melq’s powers supply in my nest stand do not s...

Read the Post in new Window Read the Post in Threaded view  Post #83: Parts Frenzy by Paul S on 2008-12-26 
Browse the content of the threads in new Window  Thread: Single-stage Melquiades vs. DHT amps in Melquiades Amplifier  397 Replies 
At this point I feel a little stupid saying that a nice stiff rectifier can help with the speed issues.  I've had not trouble doing better than the Sovtek for rectifiers; even the old winged C Svetlana is better.  I've had the best luck ove...

Read the Post in new Window Read the Post in Threaded view  Post #11: GM-100 by devo_yan on 2018-05-29 
Browse the content of the threads in new Window  Thread: 250 watts Parallel S.E. advises in Audio Discussions  13 Replies 
I read about the GU-81 penthode. It's probably a good possible solution, thank you.I haven't so much experience with penthode, from my very few experiences, I felt better with triodes (DHT or IDHT), so I prefer don't take any risk.I feel more and mor...

Read the Post in new Window Read the Post in Threaded view  Post #243: AKA J.C. Morrison’s amp but… by Romy the Cat on 2009-04-24 
Browse the content of the threads in new Window  Thread: Single-stage Melquiades vs. DHT amps in Melquiades Amplifier  397 Replies 
[quote user="Paul S"]But you aren't using the tube rectifier, are you?!?[/quote] Nope I do not.  I cancel the contribution to sound from rectifiers and “sonic quality” of chokes by using substantial value of blocking cap that does not allow AC to go ...

Read the Post in new Window Read the Post in Threaded view  Post #261: Going down the DC path by floobydust on 2009-05-06 
Browse the content of the threads in new Window  Thread: Single-stage Melquiades vs. DHT amps in Melquiades Amplifier  397 Replies 
 Romy, I have some (strong) opinions on DHTs concerning filament supplies versus specific tube types. For virtually ANY 45 triode, AC is my preferred option. Still, not all 45 triodes will be acceptable for my use, hence weeding thru many of them to ...

Read the Post in new Window Read the Post in Threaded view  Post #7: The modern V-FET design? by Romy the Cat on 2009-11-18 
Browse the content of the threads in new Window  Thread: Yamaha B-2 V-FET amplifier. in Audio Discussions  19 Replies 
I did not know that there are any modern V-FET designs. As I understand, the V-FET transistors were available in 1970-1980 and were not produced since there. From what I heard that the DIY people who try to do V-FET amps buy old Sony and Yamaha machi...

Read the Post in new Window Read the Post in Threaded view  Post #82: Diode Handoff by hagtech on 2008-01-07 
Browse the content of the threads in new Window  Thread: 6 Channel Version of Super Melquiades in Melquiades Amplifier  131 Replies 
Looks to me like the horizontal and vertical steps in the waveform are due to the diode switching.  One diode turns off while the other turns on.  Storage time on the diodes is normally short.  But it depends on the test setup!  T...

Read the Post in new Window Read the Post in Threaded view  Post #1642: Noise and disconnected DC battery supply by drdna on 2018-08-31 
Browse the content of the threads in new Window  Thread: It’s mad, mad, mad... electricity. in Audio Discussions  1910 Replies 
[quote user="kodomo"]the faint grunge I hear from the upper mid and treble ... It is an audible noise, it kind of buzzes...[/quote]Yes, that describes it. This is THE characteristic noise when there is a defect in the Pure Power unit. As far as I kno...

Read the Post in new Window Read the Post in Threaded view  Post #2: Damper diodes by cv on 2007-07-14 
Browse the content of the threads in new Window  Thread: The Milq’s power supplies and rectification. in Melquiades Amplifier  3 Replies 
Hi Romy 6CJ3 (or equivalent) is the one you want. Though I've not used them myself, I have pals who regard them highly, FWIW. It has an average current rating of 350mA, but don't forget that for a given draw on the supply, the average current throug...
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