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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Thanks paul for well thought reply. Two things need clarifiication, i am not new to the subject and am a constant and avid reader.Secondly my preference for music is hobby for electronics and pleasure of listening through application of mind and know...
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[quote]around 135-150mA if you use a single cathode[/quote]Hey, I never thought of this. You can run 1/2 the tube at a time! This actually puts it within the limits of the VacuTrace. I can test each side separately.jh...
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Hi there every one.A brief about system. Marantz transport---Acustic Arts DAC II-----Krell HRC preamp-----Krell FPB 600 class A amp---B&W 802.Previously i had a pair of carry 805 SET amps which drived Klipsch KLF 30 any how i was getting a good ...
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Well, I would say that “something is wrong” as what you report it is not how it shall be. I had my doubts about the rational to use 6C33C in direct heating coupling but the “danger” in direct coupling uselessly coming from the plate of the driver...
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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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I haven't tried to build a Melquiades but I understand tube electronics decently, so I'd like to comment on this problem.The main question is why Domidaw's output tube is apparently carrying 3 to 4 times as much plate current as it should be. It is p...
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[quote user="Romy the Cat"]
Tube traps are mistakably designed as they tend to deal with a very erroneous assertion that it is possible to feel a listening room with some kind of confused and random bass and then to correct the things with...
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At the risk of overloading you... Here are a couple of quick computer drawings showing a version made from 2 inch steel tube... Material cost would be very low. jd*...
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I am playing with the tube traps and at this point I have a dual feeling about them. They are absolutely phenomenal HF absorbents, in fact much more powerful than any other tools I have heard. They suck HF from the room with a force of a good co...
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[quote user="Romy the Cat"]
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 n...
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[quote user="KOTriode"]Romy,The normal bias for the Golden Grid tube for 200V Plate at 200ma is about 70V-80V for the good tubes, the bad tube read 0ma at this bias, when drop to -30V it start reading some current, but can't get to 150-200ma current ...
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Ok, I do not know what it was: was it DHT, was it 300B, was it some other specifics of this given amp or whatever… but those two aspects that I named: intentional density of colors and randomness of pace are something that I would like to exercise in...
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Was talking with various audio people about the 6C33C I was amazed that people are so clueless about this tube. The people are so filled with some foolish prejudges and faulty notions about 6C33C that I deseeded to put together a brief “6C33C user ma...
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I don't suppose the input tube was a 437A?And perhaps (at that price) silver trannies? I have never never knowingly heard silver trannies (apart from my Ortofon step-up), and I wonder why anyone would pay that much for them when amorphous ...
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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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I ordered today from them the 6C33C dumpers and spoke with someone in there. Forthrightly speaking it sounded kind of ugly when the guy on the phone insisted to call the pads as the “anti-vibration instruments”. BTW, I did ask him directly if there i...
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Hi Romy,
Well, I see in the photos what look like the newer Herbie's Hal-Os with the titanium rings on 2 of the 6C33Cs. Have you made any observation of the sonic effect of these things yet?
Rgs,
JJ...
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Hi Jim,
Romy may not have noticed that the tubes are mounted to the circuit board below the top cover and not at the surface, so the driver in particular looks shorter than it really is.
Will the final appearance be similar to the prototype in th...
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the less you know about...So, how do we go about screening tubes for audio, particularly audio signal tubes? The only person I can think of who claims to have found a specific testing paramerer for this is Roger Modjeski, of Music Reference and...
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Yeah, I'm a little slow here. Had very busy week pumping out machines. I do have two custom tube adapter cards built. One traces two separate 6e5p at same time (great for comparing). The other is for 6c33. So it's just a...
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application far more sensitive than simple line linestage and in addition to that ,that pre is percived to be colored and syrupy tick. Are you trying to cover up that harsh and cruel sound you're talking about ;) Could you kindly explain why pe...
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Okay, I think I understand.... and thanks for the link on the YO-186... if I can ever locate some of these I'll be sure to grab some (hmmm, a trip to Russia perhaps). As tubes get very hot internally, there were some procedures for trying to eliminat...
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If you don't already know of it, here is a link to interesting German site (in English as well) with loads of info on Tube testers : http://www.jacmusic.com/Tube-testers/index.html If you scroll down to this phrase : "SHORT OVERVIEW OF TUBE TESTER FE...
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[quote user="hagtech"]I have not tried this tube yet. It might push the limits of the tester. The 6.3V heater current supply is nominally rated at 5 amps. It might be ok to push it to 6.6 amps. I have to think about this, make...
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[quote user="Romy the Cat"]My few period DHT tube all have this springy sound but they also has a long decay of rattling. It is like string attached under the bottom of the drum and when the drum sound dies away them strings continues to vibrate. I ...
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Here is a very good article about the development tube types in the 1920 and the birth of my Telefunken RE-604
http://www.goodsoundclub.com/PDF/ProliferationTubeTypes.pdf
Then, here is very cool later but still old advertising from Telefu...
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I am looking into building a 45 tube SET amp and I keep reading about how important a good output transformer is. I read that cheaper output transformers like Hammond can be okay for mids and highs, but it will also reduce bass performance. If on...
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Are any who made high-gain phonostages dealt with vibration damping tube sockets? Since I’m thinking not about my next generation of 85dB gain two-stages phonocorrector:
http://www.goodsoundclub.com/TreeItem.aspx?PostID=2453 (second page)
I wonder ...
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I do not know how interesting it is from technological or sonic perspective but the enthusiasm and perseverance of this guy defiantly deserves applauds. Claude Perrier in his 70 makes home direct heated triodes, how many people like him are out ...
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My mind turned back recently to the subject of tube tuners – there were some even that made it happen. I have to admit that I have general difficulties with tube tuners. My past experience with then was not so great.
When we are talking abou...
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