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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Amir,in my world there is a process for selection and it is not AB or changing power cords. That does not mean that I deny that equipment (including cables) can change sound. It means that the normal audiophool description "it was immediately better"...
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Rakesh,I think you’ve missed the accent of my battery post. We do not argue abstract topologies but we argue the validity of topology in respect to sonic results. I hope we all agree that we do not exactly know WHY affects electricity sound. We do ...
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[quote user="Romy the Cat"]I was thinking about this: how come that driving 6C33C (in fact driving anything one can imagine) the 6E5P was very fine but driving 2A3 it was dull like hell. I opened the amp and tested all – everything was perfect but th...
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I did have the Déjà vu feelings about it as I felt that we had this conversation in past. Here we go – it was a year ago.
http://www.goodsoundclub.com/GetPost.aspx?PostID=4291That post has both 6E5P-E and 6E5P datasheets and they are virtually the d...
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[quote user="Romy the Cat"]If you read the very important post: http://www.GoodSoundClub.com/TreeItem.aspx?PostID=5255 then might understand that it lead to a painful research on the subject. I have ton of data now and many experiments done. If ...
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[quote user="Jack 14"]For what purpose are you using them at 22mA ?[/quote]Bias supplies-decouplers, screen regulators… those types of the things…. BTW, until I load the my 0C2 with over 15mA they do not sound well…
Interesting, Jack, sin...
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Hi Romy,The builder regards VR1 more like an "offset to 0" adjuster than a bias control for the 6E5P since its working range is quite narrow. He asked me to know from you if along the 6E5P's lifespan it needs further adjustments at VR1 or if a single...
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[quote user="Romy the Cat"]I do not know what you mean by “specific set-up” and what San Audio did is very orthodox use of 2A3 and I did not change it. The only change that I made (and I do not know at this point if it was a good change) was the chan...
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[quote user="Domidaw"] I also checked the voltage of the TR2 transformer and although the marking says 440v, it really has 508v!?!?
[/quote]Domidaw, when you read 508V for TR2, was the transformer in the circuit with a load applied or was it out of ...
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[quote user="drdna"] dkarmeli wrote:I have an AF1. I understand your justified bias regarding reviews, but this is one of those rare cases where the reviewer does know what he's talking about.David, I hope you understand Paul's recalcitrance. We've a...
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I recently picked up a MAX-282 tone arm and when setting it up with my test record I'm getting buzzing in the right channel during the bias test tracks. Changing the anti-skating setting has no audible effect. On other arms I have if I set the VTF to...
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LED facade:Mind blowing!One thing is LED in the circuit as an indicator lamp or, say, SS bias and another is a LED bulb.The bad element in the bulb is the RF generator. The LEDs in the bulbs are not fed with DC or line freq. but withRF square wave. S...
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… I do not consider it as an interesting driver and I have a good feeling that you will review your desire to drive 2A3 with 7788. 7788 is phenomenal for different application (ultra low noise + ultra high Mu) not for driving power triodes. Jim, if y...
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hm..lots of interesting information to chew on, and by and large, i've had similar experiences with first order crossovers on bass drivers .. this being my experience with a full range amp, and a two way system-- which is a far different critter than...
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what a great idea-- i never really thought of a sort of 'low pass bypass' inductor of sorts?! i'd always assumed that inductance was similar to capacitance in that regard-- the more you add, the more you get-- but hadn't thought about the...
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[quote user="Lbjefferies7"] Having said that, the 15 Commandments above look like a fine solution-based pre-amp...and the title reminds me of Mel Brooks as Moses. [/quote] Yes, it was exactly my point of reference. [quote user="Lbjefferies7"] A p...
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"You need to realise that the physically larger a Transformer becomes the narrower the available bandwidth for a given construction. Due to the need to handle a lot of "magnetic bias" SE Output transformers become very large, physicall...
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OK, I have conceptualized what I need for the tweeter amp. It will be MilqEZ – the same Milq one with 6C19P at output. I will use the Super Melquiades power supplies but the HF channels will host own last caps of the filters and own bias of the both ...
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[quote user="Romy the Cat"][quote user="drdna"] First, I do not accept the hypothesis. We must confirm that the Avicenna was working correctly when no impact on the sound was made. It has happened before that a simple mistake in observation led to a ...
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I run some sweeps on the new Melq. It looks like it is moderate, somewhere from 20-21Hz to 22-23Khz. Since I run the 6C33C at near 60W for now it is fun to see how it works. In the scope the repose and the distortion at LF looks kind of funny but I h...
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Hello every body, I live in France and I'm new on this forum.I'm thinking to build (some months) a mono big Single Ended amplifier (200-300 watts) made with triodes (IDHT or DHT doesn't matter for me) for outdoor professional audio.Have you got an on...
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I already have some PY500 (it's a sign =))) ) and I have 836 too.I read about Malquiade amplifier threads.So it seem peoples on this forum like horn speakers (I love them too) and are looking for fast transient response, it's exactly what I like.But ...
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Anthony, I grounded in my
amp it in order the shield was not hanging there free. You certainly must NOT
leave it disconnected and you do need to tie to something. Generally biasing of
these electrostatic fields shields is very murky territory. The...
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It's quite a marvel from what I can tell now. The overall sound is somewhat on the darker side but the preamp is still breaking in (although I gave it 30h benchtop burn in with the frybaby track). I also suppose it reveals the Dannoy and the room int...
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Well, I would say this CES was very low on decent sound. Sometimes I had to fight with the urge to leave a room or two immediately after hearing a few bars of music being played.Still the hope is not lost. At a fringe show at the Flamingo hotel (THE ...
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DA, I would not use any switched power supply, not to mention that they do not need to be regulated for LEDs, relays and fans. I do not know if you build a full range Milq or more complicated multi-channel version. If it is a full range Milq with onl...
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KOTriode, We had this conversation before. It is not what I regularly experience. The 20% of faulty tubes is astonishingly high number for this tube and if he has this ratio and did not change his suppliers then he must be crazy. On the good side you...
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I unpacked the Gold Grids 6C33C that I got from Bulgaria. Upon very meticulous inspection I did not find that they were in any way different then the regular grid tubes. I did not open a tube to check it further. It is possible that the Bulgarian gu...
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Yes, there are some specific differences between how various manufacturers burned in their tubes and the initial firing of the tube and flashing the getter, etc. There is an interesting video of the old Blackburn Mullard plant here:http://www.techtub...
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[quote user="floobydust"] I … use a slightly different approach. I use the center-tap as a fixed DC balance (cathode bias resistor solo from c.t. to ground) and use the balance pot with the bypass cap only to ground for adjustable AC balance. Regardl...
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