Yes, there is the ZL range and a new one that is even lower in ESR. As far as i know Rubicon produced the Black Gates so they may still have some know how.
ZA are much better than ZL. Outstanding trebble reproduction. But they tend to present thin bass in some aplications.
ZA are quite good for Digital aplications.
I also had good results bypassing Pana FM with smaller valued ZA´s in the PSU.
ZA are quite good for Digital aplications.
I also had good results bypassing Pana FM with smaller valued ZA´s in the PSU.
I use the ZL unbypassed for PSU applications....once run in they sound terrific.. and very very organic. Hav also tried to bypass with PP's but results very not an improvement...I rate the ZL higher than the BG's at least for this specific application
I use them too sometimes. They have such a low ESR that bypassing with film results sometimes in a higher value at 100kHz. Have you ever discharged them by accident ?
Taking about fire crackers.
Taking about fire crackers.
The first product of my new company Suesskind is ready now. It is the Rauschfrei Balanced Phono Stage. The concept is based on the FPS i designed for Jan Diddens Linear 0 publication with a lot of refinements and some additions. I have now included an unbalanced input and output. All combinations work. So you can run unbalanced in - unbalanced out, balanced in - unbalanced out, unbalanced in - balanced out and balanced in - balanced out. The standard version is High Z with adjustable loading from nearly infinite to whatever low value you like. This is done by inserting Neutrik XLR´s in the back because many people think that DIP switches do not sound good enough. We build a somewhat more elaborate Low Z version that has a trans impedance input with 2.5 Ohm input impedance. That can be used balanced and unbalanced too like the High Z version. The circuitry is fully balanced from input to output so there are actually 4 RIAA circuits, two positive and two negative. That gives the ultimate in common mode rejection and distortion cancelation. Components in the chain are selected to 0.1 % relative, even the caps that we buy preselected for 1%. That is important in a fully balanced design to maintain high common mode rejection up to high frequencies and avoid phase and frequency cancelation in the RIAA. There is no hum whatsoever and wide band noise unweighted is -77dB against 0.5mV input. The stage can swing 20V clean at the output so dynamic range is huge. I think this design could also be used by professionals that do vinyl transfer to hard disc.
Attachments
Nice proto.
If I understand well, cart loading is via neutrik plugs with resistors inside correct ?
PS: Is that an Italian made case ?
If I understand well, cart loading is via neutrik plugs with resistors inside correct ?
PS: Is that an Italian made case ?
That was an LA Audio Pre-Pre with tubes. I think is was 4 ECC88 tube sections in parallel.
I never could make it work without a lot of microphonics so it was rebuild by Jürgen Ultee.
It is now a Fet-Tube hybrid cascode like the Arthur Loesch circuit. It sounds nice and cozy but can not compete in transparency and dynamics with something like the Suesskind. I keep it though as a benchmark.
Thanks, Brian.
I never could make it work without a lot of microphonics so it was rebuild by Jürgen Ultee.
It is now a Fet-Tube hybrid cascode like the Arthur Loesch circuit. It sounds nice and cozy but can not compete in transparency and dynamics with something like the Suesskind. I keep it though as a benchmark.
Thanks, Brian.
Yes, Ricardo. The loading resistors or additional caps fit into the Neutriks. I use 2 x 300 Ohm with the Lyra Titan i and sometimes with a 1 to 10nF cap in parallel. The Rauschfrei Stage itself is factory equipped with 2 x 100kOhm. Natural input impedance is even much higher because i use J-Fets at the input that are hold under 4V from drain to source.
Under this conditions there is virtually no gate current so input impedance without loading in in the GigaOhm range, maybe even higher. This circuit could be used for brain scanners and the like to retrieve tiny signals.
Under this conditions there is virtually no gate current so input impedance without loading in in the GigaOhm range, maybe even higher. This circuit could be used for brain scanners and the like to retrieve tiny signals.
True "Ballanced" is the only way to the best possible sound
All the best with it . . . 🙂
Congratulation on a decision, and to unseen all hard work to achieve this final I suppose very fine sounding Vinyl playback preamplifier 🙂
All the best with it . . . 🙂
Original Arthur Loesch is a single WE417 in common cathode mode.
Think you are talking about Thorsten Loesch´s variations of that circuit.
Regards,
Reinhard
Morgan Jones and Allen Wright prefer single RIAA networks between phases.
Me too, for good reasons.
Reinhard
Me too, for good reasons.
Reinhard
I also prefer single Riaa passive circuits between amplifying stages but two Riaa stages per channel to create a balanced Riaa is the way to go IMO.
The only issues I see is if we need to add a sut, the loading becomes troblesome.
Hi JG... did you source the proto case from Italy ?
The only issues I see is if we need to add a sut, the loading becomes troblesome.
Hi JG... did you source the proto case from Italy ?
.
Maybe a somewhat North-European preference ?
Me Thorens TD550 (SME312, the Nobile clone tonearm came out later), Classé Omega phono (RIAA part dual and part floating between phases), Classé Omega MKIII line, all balanced.
The Rauschfrei looks/reads very tempting.
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