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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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One last thing I can do is buy some Mu metal sheet on Ebay and lined up the transformer can and potted with wax as you said, but that's too much work and probably do not work as well as on a separate chassis, so for now I will listen the way it is an...
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My experience is limited, but I tried it a few times (300B, 845, OTL ...) with 8 ohm Speakers, 92dB and a crossover, which is simple and never got a result which was close to a high sensitive speaker (98dB ...), no breathing, no air, Headroom was lim...
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Yes, I was concerned about that too; the nature of the synergy horn design apparently requires unusual drivers (e.g. very large excursion for the LF), but they are fine with the 845-based SET I am using at the moment. I suppose we shall have to see....
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Thank you for the comment on this amp, this is my first time of using the 6C33C tube, I decided to build this amp after reading about the Melquiades, this amp is just a quick experiment on the 6C33C sound, since I have...
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[quote user="KOTriode"] Thank you for the comment on this amp, this is my first time of using the 6C33C tube, I decided to build this amp after reading about the Melquiades, this amp is just a quick experiment on the 6C33C sound, since I have a s...
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We have tested live recordings against live sound, a recording of a jazz singer was done on Reel tape on an Ampex ATR modded machine with Fluxmagnetics heads etc. The microphone used was the legendary Telefunken stereo tube mic. no post producti...
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Romy,I added the fuse recently just for protection for the output transformer since these 6C33C tubes plate current can get very high and might damaged them. Also DC coupling on this high gm tube can cause plate current to go max if something failed....
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KOT, with the ML2s I found very little difference in the sound of various 6C33Cs, but the old Svetlanas certainly "held to spec" better (and longer..). I find the 6C33C to be more "direct" sounding than 845 or 211, but this in the context of a 3-sta...
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Very interesting! (and impressive construction there KO)I know this isn't quite the subject of the thread, but could you tell a bit more about the 212E amp, in particular, the regulator topology?Regarding 845 vs 211 - Romy, I suspect what you were he...
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[quote user="Joe Roberts"]At Munich, we cranked the Aporias up with a 20w 845 SE and they did not catch on fire but our goal for the speaker is "big horn sound in normal sized rooms"--and 8W will do that.[/quote]The Manger catches on fire with some m...
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Paul, would you think 6336 will be more stable/predictable?Have you had any experience with it?30H: sorry, forgot to mention that the PP pair is autobiasedwith a common 900R resistor...EL34: indeed it's a very popular tube for driving Stax electrosta...
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I have never used EL34 in triode, but I think it is not hard to find acceptable examples of this fast, reliable tube, and with conservative bias it should let your 6E5P "shine through", if that's what you want. Nothing like 811, 845, etc. in this re...
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I had my visit in Munich yesterday and the Cessaro´s performance was totally different. Tonally without any compromize, so it was a pleasure to stay in the room this time :) Unfortunately very much on the muddy side. I think I start to understan...
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A visitor of my site sent an email about Australian Patrick Turner who is geting more SET power by paralleling the 845 tubes. It is not uncontroversial amps but itis 55W of SET…
http://www.turneraudio.com.au/monobloc845se55.html The Cat...
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Hi Romy,Many thanks: the answers are...1. The tweeter I thought could go below the MF.2. The room is 5m x 5m x 3.6m.3. Given size of room, corner location would be most practical.4. LF will have to be compact, hence tapped horn appeals.5. S2 diaphrag...
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Many thanks for your comments, Romy. What I had in mind was not a full range horn but the first horn of a future 4-way system, as a (crude) testbed for the rather idiosyncratic method of building horns I am suggesting, and for trying out your amplifi...
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I'm sure there are many bad implementations of the 845 and 211. Almost all of the commercially available ones are pretty mediocre. However I have heard good examples of both so I know it can be done. I've yet to hear an impressive 6C33 amp so it...
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Hi,[quote user="morricab"]Hmmm....I guess I can't really see that unless you are enjoying a particular coloration you are getting from the TVC.[/quote] Nope. On this you are wrong. Based on direct bypass tests the TVC's I USE (that is the specif...
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Forgot to elaborate the Quad system.It is actually a tri-amp Quad system, below 100Hz is the Supravox 15in Field coil in open baffle, then it's a Stacked Quad ,and about 5Khz there were 5 RTR ESL cell. I did try the 6C33C amp in a single pair Quad by...
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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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Ok, I will try to lower the primary impedance like you suggested, but it will be on the new 6C33C mono block amplifier that I am building. The custom made chassis will be finished by next week and I have the better components waiting to get installle...
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[quote user="guy sergeant"] I'm sure there are many bad implementations of the 845 and 211. Almost all of the commercially available ones are pretty mediocre. However I have heard good examples of both so I know it can be done. [/quote]
Actually I d...
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Bruce Edgar room was probably the only rooms at the entire show where form my prospective it was possible to begin to talk about "pure audio", so I will.
Bruce picked and smartly holds at "The Show" a wondefull room, the small room, but fr...
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Hi Romy,Interesting scale you've come up with there. I would like you to take a look at a preamplifier from Korea called Silvaweld. I have found that with this preamp (model SWC 1000) in my system I can differentiate easily the ...
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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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[quote user="Dominic"]I'm liking lately the idea of getting a chinese 845 based SET off ebay. Point to point(less fiddly modification), there's a choke coupled one available now, umm, 10 or so watts for under a thousand dollars, you know that sort of...
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By 'lighter' I mean that the DHT amplifying stage subjectively has less inertia and is able to change direction more quickly. I suppose nimble might be a better word.
At the moment I usually do use the amplifier 'full range'. (My speakers will no...
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[quote user="vuki"]Anyway, my plan was to make powerful triode NFBless amplifier for relatively small money. I'm really satisfied with what I did. Maybe I should have done GM70 SE, but what would be my next project then?[/quote] The GM70 is a bitch a...
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This whole 833 A2 concept, given the constraints,is a no go. When driven positive, the grid equivalent resistance drops down to 1/transconductance level. For 833, being a high-gm tube,this can be as low as 100R. In order not to distort significantly ...
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Yes, my friends called me that too, but hey, I can't help it, my curiosity on tube amp get the best part of me, plus I can't build enough power amp to power all my 3 tri-amp system. I collect all kind of transformer, just for the 845, I tried about 6...
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