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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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I do not remember details already but Dima and I had the same discussion a few weeks back. After all his research he was very much disagree with textbook use of 2A3. He felt that max power and the most proper operation of this tube will be at 275...
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guy, i noticed you've mentioned a DHT 10Y linestage.i'm wondering what are your thoughts if there is a relatively easily obtainable (in say lifetime quantities:)) DHT (or triode stripped DHP or DH tetrode a la 307A or 807) capable of d...
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Lost in Space? More like Spaced out.Taking Tramadol and Soma for a cervical problem. I listened to Art of the Portuguese Fado Guitar and everything was 3D.Kidding aside, I did some reading yesterday. Some online articles on the DEQX makes me want ...
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[quote user="Romy the Cat"]I afraid it might be some vibrant harmonic discrepancies between the single-stage high Mu IDHT and DC-coupled DHT, or some kind ULF wobbling of my DC-coupled solution. I think it is something more fine then frequency respon...
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T,Agreed on the mumetal - it's wonderful stuff for transformers, just wish you could get it in the required core size for big outputs (well, maybe the US DoD can). Heavens know why AC spend a fortune on silver on an iron core.RE: the Slagle autoforme...
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Romy, I have had good experiences with the Shuguang 2A3C. There are plenty of comments in the Sewer about this tube. They cost about $80/pair and seem quite stable so they are a good choice if you leave your amps on a lot. superTnT.com is out of t...
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[quote user="Romy the Cat"] I think this requires me to raise my voice as I feel that this presumption is very common and unfortunately very mistaken. Melquiades might NOT be a solution... A person should evolve his reference points and his assessmen...
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Agree that it seems more people complain about grid power in US. Also agree that a "good" power supply is just that. Still, it seems like a good idea to have a good power supply as part of a "good" amp (or, whatever...). Some of the "best" amps I hav...
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Ok, once I got pin 8 connected to pin 1, the curves came out straight. Here is the true pentode plot at 200V screen, 0.5V/step:[img]http://www.hagtech.com/blog/images/7788-04.jpg[/img]And here is my new data sheet plot for triode mode:[img]http...
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The room shape depicted should be relatively easy to load, given that it is in fact rather large, volumetrically, so power to scale must be pre-supposed.As it happens, my own listening room was a lot like this for 13 years. 2A3 SETs with 97 dB BassZ...
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[quote user="drdna"]
Paul S wrote:
Well, I thought there was a lot of this going on all along, but that we just haven't come up with much that is "universal" Yes, my thought is that there is NOTHING universal, but that thes...
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Well, I do not know what DHT filament scenario I will choose. I consulted with different sources
http://www.intactaudio.com/forum/viewtopic.php?t=823
…but I still have no definitive opinion. There are few logical cons and pros for...
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[quote user="floobydust"] One of the reasons I no longer use a tube tester. They make a measurement at a specific target operating point(s). You don't really know what it is, so what are the chances they will be close to your actual circuit opera...
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I closed up the amps and moved it to the default operation position, right along with it all Dominus cables and so on. I played just mono music and was very interesting where I will find myself with this amp Sound. The right channel still was s...
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Ok, I did play today with the MiniMe. I have to tell that then it turn black I kind got soften with it does not look to me as large and violent as I initially thought. I made some measurement and some listening. I peaty much know what I want to be an...
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[quote user="floobydust"] Romy,
As you're planning to run a 6K load, you can run less current without the transfer curve suffering as much. So, another shot at some numbers.... rather than use a RC setup to drop the voltage, Hammond (not my fa...
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[quote user="be"]Hey. I have not seen it mentionned here, have you tried, or even considered regulated dc-current supplies for the heaters?Should have the sound quality of ac-voltage supplies combined with the lack of noise of the dc-voltage supp...
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KM:
It will be a little project to modify the amplifier, but it may be educational. To optimize the Moondog circuit for the NOS 2A3 tubes, so they will give their best, I plan to buy a new OPT with primary impedance around 3.5-4K. Will that be s...
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Thanks, Scooter.I am glad to hear from someone so quickly.I've been an "audiophile" for only 10 years or so. With the Edgarhorns, I am currently using a Cyrus Brenneman integrated amp (KT100). I also have a Yamamoto custom 2A3 (single plates) w...
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Romy, don't be so sure the amp is 2-stage. The ECC99 is a twin triode (mu=22, Rp around 2k) so the two sections could be cascaded, paralleled or the second section used as a CF or several other possible topologies.
Their 2A3 is rated up to 40W pl...
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[quote user="Romy the Cat"]Anyhow, the Melquiades does have some “tricks” in the realm of dynamic viscosity. It is what make it quite different in term of Reality Reconstruction as I feel that propagation of sound via air does not have linear “audio ...
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[quote user="Romy the Cat"]Good link, Kris. What is missing in the link is the RL filters. The RC Low-pass filters are fine as the capacitors are not in the band-pass mode. It is arguable what would be better – a subtractive shunting cap or a few mi...
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[quote user="Paul S"]Adrian, I agree that SETs generally have issues such as you describe, and moreso the small ones, especially at the frequency extremes, and at saturation, which tends to occur all too soon, IMO. But I have not sourced t...
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[quote user="Romy the Cat"]fiogf49gjkf0dI am observing an interesting and surprising fact – I am begging to like my active Marchand crossover. I did a number of modifications to it and it looks like the parts are broken-in now – it does sound very pl...
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[quote user="Joe Roberts"]I have had round Edgarhorns and Lowthers so I understand what narrowing radiation as a function of frequency is about. My thought sniff tells me Romy's rig is good enough that even if there is some component of self-delusion...
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Yep, you re right, the Yamamoto A-06S is SET, I did not read it carefully and I was under presumption that A-06S is PP monoblock. Good for Yamamoto! The only amps I heard with AD1 were PP. Somewhere in the very end 90s I shortly was exposed to i...
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…and I hope you did put your ET-703 tweeter in a time aligned position, did you?
The AD1 tube was one of those original “better sounding” triodes. I have a quite few of them; in Telefunken 1936-139 radios (I have 4 or 5 of those radios them in my st...
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Joaco, thanks for sharing. We still do not know what make those units to sound to sound good, so in a way we are shooting in dark. I have no doubts that there is great number of commercial units out there, similar to APS PurePower, which might be su...
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I tried the ML2s via their 16 Ohm taps, even though my speakers drop to 4R at about 80 Hz before going back up their average 8 Ohms at 30 Hz. The overall sound off the 16 Ohm taps was more balanced and integrated top top bottom, ...
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One of the reasons I no longer use a tube tester. They make a measurement at a specific target operating point(s). You don't really know what it is, so what are the chances they will be close to your actual circuit operating point? So choosing a clo...
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