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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Bob Graham of Graham Engineering can provide you with a silver wire transformer that sounds great to my ears. More accurately, I don't hear it detracting from my enjoyment. I use mine in conjunction with his silver wired phono cartridge s...
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The 834p is a tried and true circuit. It should be OK. If you have hum, I would suspect the step up transformers first and the power supply second. Maybe a ground lead is not attached?Take it completely out of the system, disconnect the phono leads, ...
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The positive feedback published a review by Marshall Nack of SP-102 Phono Stage: http://www.positive-feedback.com/Issue69/vitus_sp102.htmIt is an interesting review despite that some of the Marshall’s comments do not makes sense at all. I did not he...
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Phono Input Impedance MM setting: 47k ohm MC setting: 47k ohm or 100 ohm Output Impedance Unbalanced: < 100 ohm Balanced: < 100 ohm per leg Input Sensitivity at 1 kHz MM: 4mV in for ...
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The TAP TVC does happen support a fully balanced topology, for whatever that's worth. I have not discovered anything difinitive about this for myself, however. I can say that I do not consider the unit's situational neutrality as anything...
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How many sources do you currently have? If you are building a phono corrector, make it for 4 volts output. If you have a PC for digital playback, there are good DACs with more than 2V output. That would leave a tuner to pimp - certainly less risky th...
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[quote user="SOS "]Well after getting little communication from PP I decided to sell my unit. The last communication from them was on 1-7 here is their response:<BR><BR><EM><STRONG>Hi Steve,<BR><BR>The reports ...
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This Christmas I wish for 100 hours in every day, so I finally have enough time to take the EAR phono preamplifiers, the second turntable, the tonearms, the capacitors, tubes and everything else and put it together. And maybe even fix up the secondar...
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Peter, I wish I had more confidence in the amp's power supply as significant proof against the full range of AC power nasties. In fact, I have long had the sense that there is such a thing as "over-regulation" where hi-fi power suppli...
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[quote user="Romy the Cat"]Once again my regrets for the shity administrative work on my end.[/quote]I think you've been doing a fantastic work, Romy! One accident in such a long period is not a big deal.No really worthy posts on my side in that peri...
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As you may know the 7788 is a high transconductance pentode which should in theory be able to give higher audio resolution than say 12AX7, 6072 tubes in tube mic pre designs. On search here the 7788 was mentioned as being used as the ...
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I've noticed for a while now that my phono stage sounds less "splashy" since I swapped in the V-Caps, and the truth is, I kind of miss the splash, as it carried through to tonal colors, and it was low enough that it mostly made the Music "more colorf...
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This is the point, Paul: is it a self-propelled, self-ass-licking FR7 club or does this cart has any merit?Old vs. new, new vs. old...in the world of planned obsolescnce I do not know how to navigate.There is a myriad of models, but what they are wor...
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Experimenting with Decca carts, I've temporaly disconected the SUT's and decided to check the RIAA calibrationand I think I have some (circuit?) problem.[quote user="Romy the Cat"]
In the end of everything I was able to get very nice response. The...
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From your descriptions, it sounds like your phono safety ground makes a ground loop, or at least raise resistance for something, when you connect it to your PP. Are any of your ICs connected to ground at any point? The ICs "should" connect your compo...
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In the past there was such a concept of full-function preamplifiers that included MM and MC inputs. With time such devises die out and nowadays it is VERY difficult to find a full-function preamplifier generally and a good sounding full-function ...
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It just was brought to my attention that Shelters released 2 new cartridges: 7000 and 9000. They claim for both: New design technology. Newly designed body, high rigidity, improved front-yoke, larger diameter PC-OCC lead wires wound around the redesi...
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The iDAT-44+ just got back from a visit with its dad, John Wright, to repair an intermittant fault and to work his current round of "upgrades" to the sound. Also, over the course of re-integrating the fixed and improved iDAT, I re-thought the way I ...
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[quote user="hagtech"] Musta been a teenage thing. I never got around to experimentation with my own chemical formulas. [/quote]
Nope, it is nothing to do with teenage thing but rather a cultural thing. In Russia any more or less civiliz...
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I recently could not pass up a good deal on a EAR 834P MM, so I will have the opportunity to compare it to my current phono stage. It is funny since I had planned to listen to EAR phono stage in my system about 10-15 years ago when I lived in Santa M...
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Somebody today created at my site a link in the visitors section with a link to “Home of the Arthur Loesch Phono Preamp”. The link to them existed at my site for a while
http://www.goodsoundclub.com/Links.aspx?Q=Loesch
… but the ...
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Thank you very much for all the help/advise. I'm still to investigate the problem. The working hypothesis is that my phono has some GND routing problem. Will examine it with the scope and shortening method to see if that's the case.
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[quote user="twogoodears"] Yes Roman... I feel pretty like I entered a sort of "cul de sac", tube-wise... I contacted, few months ago, Western Electric USA and they told me that, at USD 750 ea. they have "plenty" of N.O.S. WE 437A... I've been ab...
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My exorcisms to eliminate 100Hz PP induced noise in the EndOfLife phono gave no results so far.
- I took GND from the PP socket and tried connecting it to various GND points I could access (the signal GND plane, input sockets GN...
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A private Project is finished.
Some record collectors and serious Listeners (RCA Living Stereo, Decca...) wanted the best Phonostage to...
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Hi Romy,Due in part to your enthusiasm for the older 78 rpm recordings and in part to my own curiosity I have decided to add the facility to play these to my system. It also helps that an old aunt has given me a large quantity of classical recordings...
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Perhaps I should have mentioned before that the K&K is another spin-off of the well-received Arthur Loesch RIAA network. Also, the K&K's gain scheme is based on "classic" microphone circuits. While I am not say...
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Thanks, Gregm.
My primary concern with all those IC-based phonostages is that they are thin like hell. The audio freaks like it, I do not. I never heard the DACT CT-100 and can not speculate. I have seen this one:
http://www.goodsoundclub.com/PDF/D...
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It is not about the LCR phono as a concept – many companies manufacture the RIAA LCR constant impedance networks: Lundahl, Tango, S&B, Da Vinci, A-D, your Allnic looks like dose them as well. The LCR filter is not complex and any manufacturing ho...
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Interesting point of view Romy. I have been exploring what I think is the same phenomena with the silly Ground Control devices. Certainly the changes brought about can only be happening on the "dark side" of the notes, since the devices are connected...
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