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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Romy, thanks, as usual, you seem to have been right. The system is on and I just checked V2 voltage; its way off, above .4VDC, so I grabbed a hot pad from the kitchen and rocked the V2 tube. The socket made the familiar a dry creaking sound and see...
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I run the driver tube at 170V @20mA. I don't think you need to run this tube at high current. It is very linear with wide signal swings at this bias. I can get roughly 70Vrms out of it. Output stage clips first, driver continu...
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Are you sure you don't mean 880mV or equivalently 0.88V ? If it is 880 mV then the output tube plate current is indeed 880 mA, which is way too high, but at least then we know C10 is definitely not the problem. What is the voltage at pin 5, the outpu...
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I did not make my mind about it but I have some “concerns”. Using SS amps and hearing different SS amps I do not like their bass and the notion of a powerful enough DSET to be able to drive ULF in A1 was born. Sounds logical. However, recently I ...
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I stopped by today in a local warehouse and picketed a 4x 16” fiber pipes and 2 two 20”. I absolutely love the effect. As soon I brought the tubes to the room and took the cover off in the hall room turned to be much quieter at HF. I did not expect t...
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Nope, I do not have the itch with ULF sound but I do have a mild itch with ULF concept. The itch is not strong enough to make me to do something but I would like another day to push the boundary of reality and to see what in behind the rabbit hole. L...
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One of the ways to drag the REL tuner in the realm of civilized sound is to get rid of any crap that it has after its detector. One of the first things is to replace the 60 years old Germanium diodes with contemporary ultra fast and ultra low capacit...
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As usual, they leave out the VacuTrace, by far the best modern day tube tester. Same with the Alan Douglas book (who claims to be an expert in the field). They both mention the Sofia, however - a machine plagued with problems - as th...
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I listened to $$$ Wavac amps with 833 tube driving Kharma speakers and I found it sounds like the old tube radio in my garden hut at 40°C. Why not more semi-active speakers with high-sensitivity mid/treble and transistor-powered bass? ...
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[quote user="Paul S"]I know zip about using the 50, except it is another very "clear" tube that seems to have more "qualities" than the 45, and some folks attach +/- [/quote]... is hat what when all those folks attach +/- value to those qualities the...
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[quote user="Romy the Cat"]
Romy the Cat wrote: Romy the Cat wrote:http://www.goodsoundclub.com/pdf/YO-186.pdfI have to admit that I have written a few pieces of writing about my experiences with YO186 but I withhold to post it as I do not know if...
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[quote user="Romy the Cat"]From what you describe I can conclude that your DAC is not good. You said you use DIY wireless DAC with tube output. I do not know what wireless mean in this context, but it is not important. I also know do not like any tub...
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Yep the same company (they also make a VERY good sounding OTL using the 6C33C tube). I have heard that zillion tube amp and it is also quite good (but I thought the 6C33C amps captured the "correct" tone better). You should try to hear th...
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Jim, actually I see your PO Box at your site, is it the place where I need to send the tubes?
I undusted what you are saying. It is easy to pick the obviously bad tubes but it is much more complicated to have a tube that is “a half way there” and b...
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As an alternative to this nonsense, consider an old, used Neumann microphone:https://vintageking.com/neumann-u47-dual-pattern-tube-microphone-3883-vintage?cr_campaign=PV%20Shopping%20-%20Lowest%20Priority%20-%20Brands%20-%20Used%20and%20Demo%20Deals&...
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HI Paul S,??? Paul you wrote "re-grease tube pins and sockets" ??? That must be some very conductive HIGH temperature grease. I personally keep my amplifiers' tube pins and sockets dry. Maybe you know something here that I have missed all these ...
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The basically the same tubes. The 6E5P has own unit pins layout with heaters connected across the tube – very moronic in my view and it does not allow twisting the AC filament wires to the very end. The 6E6P has a common pins layout that most of west...
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[quote user="cv"]I have some theories...*please* keep this tube safe, we will have to run some curves on it...More importantly, it's a good thing the output transformer wasn't damaged, though I'd imagine the tube would have struggled to pass more...
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Well - there is a technical literature related the cooling of the tube. According to it the temperature of the glass surface is not equall - it is hire in the places, where heater is visible. So - you can make a pair of radiators, at...
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I'm about to place an order for some 12AX7 tubes. The GA 12ax7 tube you mention doesn't seem to come up in my search. Is there other info regarding this tube?...
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A few posts above, actually inn the install post of the thread, I have metioned the Absorb-GEL device. Well, I got them yesterday. They are expansive, something about 70 European dollars per pair, pleasantly made, reasonably designed and it looks lik...
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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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Dear Romy,
I have been reading the threads on GoodSoundClub about your journey with development of the Melquiades and Super Melquiades amplifiers. They are very interesting to me. I am pleased that your purpose was to produce a particula...
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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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[quote user="drdna"] I think this 2A3 must have a specific set-up to sound its best. You have not found it yet. To begin with and familiarize yourself with the sound of it, I suggest sticking with the topology that has been tested by amplifier design...
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[quote user="xandcg"]I don't know if you was being
sarcastic on that quote but Lampizator does the DSD conversion in a R2R way,
using a power tube instead of a DAC chip.[/quote]I am not sarcastic and the "review" above does not
extend any of my kn...
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[quote user="decoud"] Romy, can you be persuaded to post a sketch of what you think the optimal 2 channel Melquiades circuit would look like? [/quote]
Decoud, I do not think that there is such a thing as optimal DSET. The entire concept of DSET is a...
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[quote user="cb"] The bias voltage I get on the 6e5p is around minus 4.4v on both the circuits. This is with the inputs shorted. With the inputs connected to adjust voltage to 0.0mvdc, I get a reading of plus 0.4vdc. This is with VR1 set at maximum (...
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[quote user="drdna"]You want a suggestion for a good 2A3? Get Ricardo Kron's (KR Audio Enterprises) KR 2A3. Very rugged, overbuilt. There is no comparison between this tube and all other 2A3's, and I tried many of them. The sound is more dynamic, the...
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Thanks, floobydust.
There are a lot of interesting points in you post to consider. What speaker you drive with your 2A3? If they are relatively high sensitively (like compression drivers) then did you consider going with a single stage? I think I ha...
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