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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Hi Dima,Thanks for your comments; please forgive the chaos of what follows as I have to rush!
Agreed on all counts - the dc bias point would need adjustment and monitoring; I supposse it depends on how stable the electricity is from the wall; anothe...
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[quote user="hagtech"] 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. [/quote]
Good operation points for use it as a driver. You might...
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Sine I informed public about Melquiades amplifiers I receive many emails from people asking me about the operation points of 6C33C. For whatever reasons people mistakably took me for some kind of 6C33C guru, which is am not. Moreover I could be hardl...
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[quote user="Antonio J."]You can find a brief description here: http://www.salicru.es/index.php?id=1678&L=2 My unit is a RE-1009 2T, which means has double transformer, but it's not the extra noise filtering model which they call NS. Looking at t...
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[quote user="N-set"]BTW, how stable 6E5P is? I'm asking as I was contemplating biasing the output by the voltage drop on 6E5P's plate choke (DCR is say around 1k),with only some minimal autobias on the output. The drawback is that any drift in th...
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[quote user="Romy the Cat"] I do some very interesting experiments with Rohde & Schwarz tuner. Dima and I have discovered a way to use the Schwarz without the wide bandwidth amplifier, driving the Multiplex Decoder from the Schwarz’s preamps. Bas...
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Contemplating now how to organize biasing for 3 singe stages of my 6-chanls amp I was faced the dilemma: do I need to bias my tubes. The 6E5P/6E6P are Russian tubes and it means that are very different right from the boxes. The Milq, driver tubes, be...
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[quote user="Chirag"] Well..my first question would be regarding the application. The big Melq tube is already doing the bass towers...is it not enough current? [/quote]
Chirag, I’m not planning to use this power amp in my system. ...
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[quote user="Romy the Cat"]I kind of like that APS stay behind of their regenerator and that they are trying investigate what went wrong. Who knows, perhaps when the APS unit arrive back to me (after some changes in the unit state) it will be effecti...
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[quote user="jessie.dazzle"] I live where FM program quality justifies a good tuner. Despite getting what I consider to be really excellent sound from this modded TU9900, I will one day compare it to a TU-X1. I will post my findings here.[/quote]
Je...
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People, keep asking me about the sound of Melquíades and I feel strange as I really can’t not explain how it sounds. It does not make any sense as I initiated this thread with the objective to explain or at least to inform about the Melquíades’ sound...
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[quote user="hagtech"] After many years, Romy has come to enjoy this style of amplification. If I read his words correctly, the sound of these machines brings him more emotion and connection with the music and musicians. An admiral goal.&...
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Interesting, Very interesting.
I might make some observations now, claming this recent modification as a success. The minor gain of sensitively certainly did not heart but the major advantage was defiantly the “activation of ceiling”. It is hard to ...
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[quote user="floobydust"] The main component that limits low-frequency response in any SET is the OPT. For these initial designs, I used the smallest Hashimoto SE OPTs... their H-203S for the 2A3 and their H-507S for the 45 which are rated at 7...
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Yesterday I spent most of the day to play with my IB, trying
to make it to sound the way how I like. I
pretty much wanted to re-implement on analog level that surprisingly good result
I got with digital crossover. So, I have built my along crosso...
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Here is the general specification for the parts that I used. The selection of the parts implies some liberty of course. It will be your amp after all, not mine - do whatever you wish. In some case when I feel that requirement is critical I will stres...
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There are few more observations I would like to share after listening
my new IB over this weekend.
The midbass. The midbass channel that is handled by a single
Vitavox 15 driver with use of my new IB became if not more propitiate but at
least m...
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I told somewhere at the site about my idea of Zarathustra.
The amp as good as it is but I want to make it super compact and with max efficiency.
The efficiency I was considering to get
by making the secondary of output stage switchable. I got fro...
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One of the greatest and the most important things for me in power amplifiers is their ability to differentiate tones. When you listen live music you practically never hear two identical tones. Even two identical pitches presented after the diff...
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Hi guys,
Thank you for the comments. I'm a complete newbie to RF, long learning curve ahead.
1) Antenna - My guiding was Romy's finding (backed by Dima) that this tuner is easily overdriven with too strong an ant...
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Preamplifiers: keys to mystery – or…. how a preamp might be not only a load-driving gadget.
Years after years the preamplifiers are being a “terra incognito” of audio people. I admit that preamps are a subject of my persistent curiosity. I was alway...
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This weekend wife told me that I should not do nothing else
but to fix my playback and this was exactly what I wanted to do. Yesterday I took
good 14 hours to play with it, moving boxes, trying to find a good
configuration, making measurements, th...
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