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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Romy, this is quite interesting; supposedly, the Marantz 10B was a knock-off of this, if I recall the lore correctly.Of course you will give this Grande Dame ('54 - '55 ?) a fair shot with some new parts, apropos? Especially new caps?I have out...
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Very interesting "review" thanks.The 150D is possibly not the most relevant comparison, it does not seem to be a high quality product since its ESR values are not even mentionned in the data sheets.Tha T97 series: ( http://www.vishay.com/docs/40092/t...
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[quote user="Romy the Cat"]Did you try just for test to increase the caps value that short the plate to ground? Will it amount and the character of the noise change? [/quote]Just like one would expect: 0.1uF shorting cap gives approx 4x more ham than...
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Ive heard you mention copper air caps before. Do you have reason to think they would actually make any difference vs alu....
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FYI: Talked to a vintage specialist/repairman about old dried caps. Compressed sound and lack of space are the two things he mentioned straight away....
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[quote user="Romy the Cat"]Thank you very much, it is very nice to learn about it. The dilemma that I see standing in front of me is following. In a 194 months, I have my Remies completed and fully operational, sounding perfect after 2 hours, let's ...
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[quote user="Romy the Cat"]
Brian,
I sourced the air caps from here:
http://www.oselectronics.com/ose_p96.htm
... I am working on a problem of a permanent attachment of those caps into my woman. I hope she will “sound better” after that… :-(
Th...
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[quote user="Romy the Cat"]Brian, and how do you find your MOSFET behaves compare the 12AX7-based cathode follower?[/quote]Romy, I have yet to try. Only got them on recommendation very recently. They're cheap enough to try in a B9A plug-in without al...
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Paul, in my view the air-caps as an ultimate cap, the ultimate by own intrinsic topology. It is particularly the case for the 834P- like application as in there the cap is not biased by high voltage DC and gets constantly re-polarized. You see the pr...
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I have reason to suspect that my beloved large Cardas couplers have continued to loose HF past the point I described as "settling". HF is no longer correct but rather attenuated relative to LF, and clarity has begun to suffer, too.I will ask K&...
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Here is the link, though I have no idea whose words he is quoting:
http://twogoodears.blogspot.com/2010/02/again-about-duelunds-coherent-audio-pio.html
The caps are $1000 per 630V/1uF. So, I wonder what those super expensive caps ...
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Romy, It could be dirt (dust) in the aircaps..Friendly regards, rogier...
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[quote user="zako"]I SEE IT NOW,,,I DONT UNDER STAND HOW MUCH AUDIO ENERGY COMES FROM THAT COIL CORNER (Thats what I call it) BUT I GUESS EVERY BIT HELPS...[/quote]Hi Zako,I'm sure you are not doing this intentionally but your all-CAPS writing style ...
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I never heard people shunted battery with caps in order to change sound. In case of battery power unit it does not make sense as there is no HF noise some in the picture. Yes, battery has own noise but it usually no where hear what the audio circuitr...
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Functionally, these are the same caps I already replaced once/twice (and wrote about) before, namely the big "parafeed" couplers. The unit came with bypassed 4 uF Kimbers, which were fuzzy and slow, so I replaced them with 3.3 uF Mundorf Silver...
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[quote user="Romy the Cat"]As much as caps in speaker
crossovers makes deference, so do they make in coupling applications. In Milq
the cap is light duty as the amp never goes A2 and the cap is not change the
polarity, still the coupling caps do m...
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Even if we all agree that the expensive film and foil or paper in oil caps are the best-sounding varieties available, there remains the problem of the inherent limitations of these types of caps. The paper in oils and the film and foils are not only ...
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Hi to everybody,I have used those caps: teflon V-caps, AN copper, Jensen copper, Siemens at the signal path of a tube power amplifier (300b SE) application. V-caps are technically very good, very clear, less microphonics, but missing s...
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I certainly have my hands full with those dams PP2000. As I least last night UPS lost one of my units I send to PurePower to repair. The shipment was insured but the saddest part is that it was the best sounding PP2000 of mine. So, I will not be get...
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Dan, those 1000V caps must not be used under any circumstances, even they are with Vitamin Q impregnation. Even the 400V cap is too bad for speaker level and you need to go for 100V caps. The film caps with excessive voltage are not good but they sou...
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One of the reasons cited for using several smaller caps is rise/cycle time, versus 1 large cap. I understand it is also easier to wind the smaller caps to the desired high-zoot specs. Muse caps are said to have very low rates of failure, compared t...
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[quote user="drdna"]What specific objectives did the air caps address in the circuit? You refer to the tempted virtue sound but I am unsure as to the goals that you were trying to achieve with this circuit alteration?[/quote]Adrian,
I what wro...
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Having two dedicated lines of each phase-split was a great idea. Each of the phase-split behave like different animal and even though there there is some penetration of events from one 120V phase-split to another but they do act, measure and sound as...
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[quote user="Romy the Cat"]When you are taking about “caps at higher frequencies”, then what do you
mean? The line level, the speaker level, the line level between? Do not forget
that a RL filter is always preferable over C filter.[/quote]It was re...
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[quote user="PurePower"] You point out that if a capacitor can hum it is faulty and wound improperly.
You are absolutely correct - the way a capacitor is wound will determine if it can hum or not. Unfortunately almost all capacitors on the m...
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I do like the assembly. I o not fine it messy at all BTW. I would like to have inputs slightly closer to the grid of the first tube. I would also run the heater wire further from the circuit and decent them from higher distance. With all in place you...
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Yes, I do think that the caps in here are the key but there is a twist in it. The “formatting “or burning- in of capacious is a polarization of dialectic, with time the dialectic got charged and “sounds” better. Also the dialectic is mechanically str...
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This has been one hell of a ride! The new caps had gotten so bad yesterday and this morning that I was almost convinced (again...) that my cartridge was finally, really shot this time; what else could it be? The upper mids and lower treble had suck...
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[quote user="decoud"]I suppose at least you can give him credit for reversing the switch from electrocube 935s back to your favourite 950s....[/quote]Nope, I do not see any reason to extend any credit in there. I have no idea where those caps are ins...
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Measet, I will try to find a photo and the schematic as you requested, but it may be a while before I can locate them. Plus, we are still digging out from Hurricane Irma down here. As I recall, I beefed up the raw D.C. supply and then used an LM317 r...
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