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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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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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Hi,[quote user="morricab"]As to the best transformers souding more transparent than the best resistors, I'll believe it when I (don't?) hear it. You claim to have heard this but I most certainly haven't. [/quote] Well, the claim is no...
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I'm in touch with a reliable technician who is going to build the Melquiades monoblocks for me. He has suggested some changes which I'd like to comment, he's having trouble to find some of the parts. I hope you can help with this:- Regarding C2 the 2...
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[quote user="be"]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...
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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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[quote user="jessie.dazzle"]Romy, you may be right in suggesting that I am "going a little crazy in there" (I consider this a compliment btw)... so for now I decided to try some locally sourced precision metal film resistors (Vishays are not that eas...
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[quote user="Romy the Cat"]The events of the last 3 days are incredibly stupid, incredibly interesting and very educational. During the last few days I have discovered some very interesting phenomena, ok might be no a phenomena but a behavior, th...
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The SS out does calm/quiet/clear things considerably, but there is a price for that clarity, as I have reported.You probably already looked into JFET?Do I "remember" that you had a stash of exotic adjustable air-core caps? As you can tell ...
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N-set, at the socket is usually the best place for tube-specific parts, and straight undernerath the socket is often the quietest at-the-tube location. Sorry if your socket connections are hard to get to. Again, I think someone makes a nice "socket...
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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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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. Basically we put two stages wit...
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N-set, the usual way of dialing in RIAA is the anti-RIAA curve, trying for null. This might be from any source with appropriate output voltage/impedance fed to the corrector input. The obvious problem with the LP is that it depends on the arm and c...
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[quote user="Paul S"]N-set, at the socket is usually the best place for tube-specific parts, and straight undernerath the socket is often the quietest at-the-tube location. [/quote]Yes, this is my exp. too, although loading R has two roles here: 1) ...
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I also got tired of reading all the DIY posts on the S&B 102. And yes, I have done the numbers, and it would be possible to adversly affect bass with high impedance feeds and/or long, bad cables feeding this unit, coupled to ...
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The "funny" thing is, the part that "sounds the best" in one situation might not do as well in another situation. A great example I can remember is the fabled Vishay S102 resistor at the grid. Great for stepped attenuators; not good at all at the gri...
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Hi Romy,On my to-do list is a single ended version of the F5... essentially just the upper or lower half of the schematic, with a load resistor to opposite power rail (or perhaps a low DCR SE transformer) replacing the complementary portion.Alas it's...
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Alex, I am guessing that with the listed "compliance" of the 901 you could use an I-beam as your tonearm. You could probably start by taping a small adhesive-type tire weight, ~10g, to the SME headshell and maybe add corresponding weight t...
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OK, I read the blurb. Now that the cat's out of the bag, and we know it's just a resistor ladder, why not use... a resistor ladder? Gotta hand it to those "MIT" guys, also I think there's room yet for upgrades. How about a deluxe, super-limited, l...
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Pretty clean, Romy (and one hellova tranny at Fundamentals)!Of course, I have questions:I thought you said Vishay metal foils in your earlier response about bias adjustment?If so does that mean steps, or... how, exactly?When you specify "Full" ...
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Hi Romy,I too have for quite some time been on a quest for a truly transparent preamp. To this end I have tried some that were indeed very good such as the Silvaweld SWC 1000 that I now own and especially the Vacuumstate RTP-3d from Allen ...
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Thanks, Adrian, as I underused the Dave Slagle is autoformer guy. I have no needs for autoformers as I need purely restive load. I fact it is not big deal to find switch, it is complicated to find a ready to go attenuator. Mike Percy care many ...
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Hi Romy,Minor question with hopefully a simple answer.In the DSET schematic you have a 12.1k resistor in the bias for channels B, C, D and F. I have some nice 12k resistors here (not 12.1k) that I could use in those positions...can you see a problem...
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A long time ago, when EAD dsp 9000 pro came out, Wadia had a DAC with volume control I dont remeber the number right now but -i think it was the 2000 anyway, the big deal about the EAD 9000 was that the integrated volume control was only 6db in the ...
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Like I said, musical bass via the TAP does not thin out at all before my BR bins roll it off; but that's as much as I can say at this point. And (against conventional logic) the TAP certainly does much better bass than any active LS I...
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[quote user="Antonio J."] - Regarding C2 the 2000uF/450v cap, he suggests to replace it with 5 x 200uF/200V by Mundorf (he can get them for a good price, probably better those five caps than a single 2000/450). I'm not sure about this replacement, it...
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[quote user="Paul S"] Pretty clean, Romy (and one hellova tranny at Fundamentals)! [/quote]
50mA, 60H, LL1623 Amorphous
[quote user="Paul S"] I thought you said Vishay metal foils in your earlier response about bias adjustment?
If so does that me...
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[quote user="Axel"]OK, this is useful also, in that you have not noted a "pattern" as you say. My point is closer to your suggestion, that I do change cart --- and sometimes buy new ones, B U T I do not buy other SUT (at least I try to avoid it). I'...
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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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[quote user="Romy the Cat"] A few things that juts comes to might mind regarding the Cosecant. Gordon says that it is a Passive Multibit DAC with a single Shinko Tantulum resistor “because only a resistor can be a linear device over the entire audio ...
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I received a comment form people who reportedly well-familiar with using the high-frequency high gain tubes. They suggested me that the resistor between screen and grid (R23) might be eliminated and that would bring some benefits. It very much might ...
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