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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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[quote user="drdna"] It is NOT that better tubes have no vibration. Instead, the tubes that sound best to me seem to have a sort of springy sound, like the sound of a water drop or the sound of the tabla drum being struck. [/quote]
Interesting. My f...
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In the thread GM70 vs. 6C33C two year back I have written that the only tube that I would like to trey in Milq besides 6C33C would be YO-186.
I am not sure that it might be a right direction or even interesting direction but I picked yesterday a par...
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[quote
user="anthony"]Hi Romy,
So it is time to think about the bass output
transformer in my DSET. My bass channel will be 8 x 25W/8565-00 each side
set in a sealed box and will cover the frequency range below say 100Hz.
These drivers can be ...
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[quote user="darkmoebius"] I would never just jump in and attempt to build the Melq (or any other amp) without months of studying the design … [/quote]
Good motivations. To simplify everything: the Melquiades was at attempt to make two stages, capac...
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It is nice to see the de-centresation of audio manufacturing. Formerly US, UK, Germany, France, a few Scandinavians and off the wall Japanese were making high-end audio. Today the lead positions in interesting high-end audio have moved to Poland...
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Yes, Jessie, but in case you decide to go for DSET, would it be multi-channel Melquiades or anything else, then your consideration for type and topology of the lower bass would greatly dictate requirements for your DSET. If your lower bass channels r...
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I already wrote a few times at my site about 6C18C. Search if you are interested.
http://www.GoodSoundClub.com/TreeItem.aspx?PostID=2292
If you use the 6C33C for amplification or regulation then you would hardly avoid attention to 6C18C. It w...
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Further looking at where I would like to take the new 6-chennal version of the Super Milq I am contemplating a new revision of my bass channel output transformer. Currently I have Jack Elliano’s made 450mA, large, single section LF transformer that b...
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[quote user="Romy the Cat"]I think it is about right. The 6C33C for upper base has 100K
biasing resistor and 20K to ground in Lpad. That would make ~60Hz. This high
pass that unload the LF from the horns that it can’t handle is very important
as y...
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KOTriode. One of the reasons why I advance the idea of using 6C33C for sub 100Hz bass is because it is very easy to say objectively if it is enough power. You see, when you use 845 for instance the tube might jumps in and out if A2. Since it is D...
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[quote user="Cosmos"] Anyway, as the description on our site on second paragraph says, the third 6C33 located at the back, is used as the pass element of the regulator (controlled by solid state circuitry) providing 220V with 100uV of random noise &a...
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[quote user="Romy the Cat"]Output transformer. Here is
what the thing become complicated. Of you drive ultra-low impedance with step
down transformer then your secondary turns will decrease. They primary will
have whatever they have for all case b...
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[quote user="jessie.dazzle"] One did; in reviewing the L2 preamp, John Atkinson (Stereophile) wrote:"...The absolute polarity was preserved from both sets of outputs with the front-panel switch set to "0 degrees," confirming that the XLR jacks ar...
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I never heard the Vacuumstate. A pair of 300B in the “differential SET” application… Hm, would it sound different then a regular 300B? Juts kidding… The last “SET tandem” that I head was with a pair of 6C33C in “differential SET” pushing 45W. The amp...
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I always was kind of afraid of it. Any single zillion years tube I see is “NOS in box”, “measured as new” or “never work”. So, I wonder where those uses up old tubes are gone? Do people trash them or juts sell them “as new”. As many old tubes I ever ...
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[quote user="ml8"] If you think gas regulators make sound of 6E5P so nice, didn't you try putting gas regulator tube in the grid of the 6C33C, and why? [/quote]
Sure, I trued. It sounded very bad. I pull out of my butt any imaginable rational with e...
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If this is the case, then the Morons will effectively have less rather than more power unless they are more careful than usual to match the loads, which seems like the opposite of "what the Market demands". Cranking up the NOS 12AX7 ought to make a ...
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Interesting. with sealed 280 sq feet and 8 drivers per side along a long wall you very much migh be able to use a singe 6C33C. With proper loading, good trasformer, DSET and these drivers you should be able to get bass that I doubt you will be able t...
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Gintaras, this is
funny as in my last post I meant to write that I might not remember correctly
and you need to look in my old posts. I did not write it for whatever reasons
but what you did was right. Whatever I wrote in my old post was correct. ...
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Hallo Romy, i'm interested with half triode at 6C33C , but im confuse how to set it,... Full Triode : pin 1&2 give 6,3v , pin 6&7 give 6,3v.Half Triode : series pin 2&6 1&7 give 12,6v or just use pin 1&2 give 6,3 vthanks before......
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The concept of self-testing boot cycle is nice one but it for sure could not be done during the amp booting. Some tubes do need to warm up and reach the cruse temperature in order to be tested, some do not. Some tunes (like 6C33C) in fact is best to...
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it is worth reiterating in this thread -- and perhaps Romy should update his advice in the relevant section -- that exotic japanese teflon sockets such as the one made by yamamoto soundcraft are no good for the 6c33c, whether because of insufficient ...
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This thread is split from the following thread:
http://www.goodsoundclub.com/LatestPosts.aspx?ThreadID=2665
Jessie, I hope you do not mind that I pulled it to the forum explicitly dedicated to the Melquiades Support.
5-channels Melquiades is ...
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Paul, Alinco magnets perfectly able to drop a charge "just like that" and I presume that it is what happened. If cause the environmental difficulties would not do it alone, at least for that time. Over winter I had output tubes worn up on both amps a...
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[quote user="Paul S"]I got new 6C33Cs for V2s from Lamm because no one else wants to match them, let alone match them for gain…[/quote]
There is no meaningful mutual conductance or bias matching for 6C33Cs (in context of ML2) besides gain matching, ...
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After burn-in the heater for 24 hrs, I tested all 3 Golden grid tubes on a bench power supply , 2 of the tubes worked fines, 1 tubes does not have current. The tube seller gladly refund for the non functional tube.I talked to a 6C33C OTL amp manufact...
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I used 6c33c at about 250V Vp, -100 Vg and it was good. Another important point for sound of tubes - the filament. I find out, that the sound at 6,0-6,1 V filament is preferable to the one at 6,3V. I simply add a series resitor for each socket....
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[quote user="AnonymousUser"] Line level crossing or passive speaker level crossovers-same devil. [/quote]
If you are planning to build a dedicated LF SET then the line level crossing vs. passive speaker level crossovers is not the same devil. With a...
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Ok, I just read your "Melquides Remote biasing". This technic can not be duplicate in my amp due to DC coupling, the C3G (I dont use 6E5P) driver stage basically adjust the 6C33C current in the output stage. Just for curiosity, I will build a mono bl...
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Hi Romy,One my channels started emitting intermittent loud popping sounds, once every few minutes or so, and on inspection the current (set at 240mA) was in excess of 300 (my meters top out at 300). Assuming it is a tube problem I replaced the 6c33c,...
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