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Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, etc.

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Old 4th February 2012, 09:29 AM   #5131
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Willkommen bei Tropical Music - Weltmusik Label und Musikverlag
It seems they are still alive....
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Old 4th February 2012, 09:43 AM   #5132
brianco is offline brianco  Ireland
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Joachim,

May I also have some 2SJ74 please? (x60?)
Can you also get 2SK170?

Thanks,

Brian

Last edited by brianco; 4th February 2012 at 09:47 AM.
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Old 4th February 2012, 10:18 AM   #5133
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Hey, count me in for the paradise as well as the masterpiece!

(One day, I would need a cool preamp as well. Since now, I always found signal selectors to mudden the sound, so normaly I just replug cables...)

I would eventually want those 2sj74'th as well, have to check how many fakes I have! (have a bunch from reichelt, all low idss range)

Rüdiger
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Old 4th February 2012, 12:35 PM   #5134
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Yes, Reichelt ships GR grade. They are useful for buffers and constant current.
Brian and Rüdiger i count you in.
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Old 4th February 2012, 01:06 PM   #5135
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For CCS, J103/K246 are more attractive at Reichelt, starting at €0.65/pair.
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Old 4th February 2012, 01:52 PM   #5136
MiiB is offline MiiB  Denmark
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I just just hear the Constalation gear (Phono preamp power) on a walker airborne TT with the clearaudio goldfinger cartridge....all playing through the Raidho C1.1, must say that the see trough to the music, the layering and the physical pressence off all instrument was byond my wildest imagination, if our paradise or masterpiece can be made in the same performance level we're in for good good expirences..
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Old 4th February 2012, 02:24 PM   #5137
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MiiB, when you come back you could work on the BJT version of the Masterpiece. This time i am not afraid to use expensive parts.
I am very happy that JC´s new Orion phono works so well.
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Old 4th February 2012, 03:48 PM   #5138
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For a balanced volume control i like configuration B, of cause without the input transformer. It is a shunt and does not have problems at higher frequencies. I use a shunt volume control too in my system and it sounds more transparent then the standard configuration A.
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Old 4th February 2012, 03:57 PM   #5139
sampler is offline sampler  Lithuania
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Just too check. In #5121 pic 1, R20,R21 sets our noise budget before we even begin to parallel more input devices. This is less a problem for 5 Ohm cart as we can through some 50 Ohms there (total 100 Ohm loading) and still have decent DCR of some 26 Ohms that gives us SNR of ~72dB to start with, but with higher impedance carts, that can go down to 69dB and less. This is always the case with gnd referenced diff inputs. Are we ok. with that ?
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Old 4th February 2012, 04:48 PM   #5140
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I can not see how R20, R21 add a lot of noise. They are not in series with the signal but parallel. They take away some voltage from the cartridge though. Say we have a 5,5 Ohm Lyra Titan, the input resistance is about 27x the cartridge impedance so they eat less the 4% of the voltage so signal-noise will drop by 4%. In case of the DENON DL103 we have a cart. impedance of 40 Ohm. So the resistors eat around 27%. We can solve that by raising R20, R21 to 2kOhm each, so the resistors again eat 4%. SN will be worse with the DL103 though because of the rather high self impedance of 40 Ohm that is in series with the phono stage input. When we use 4 Fets in each position for a total of 16 we will get around 77dB signal-noise with a low impedance cartridge like the Lyra Tiatn.
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