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Old 3rd February 2012, 10:54 PM   #5121
sampler is offline sampler  Lithuania
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It does quite nicely Gain dropped 3dB per same device count on a branch, so what we have here ladies and gents is balanced for sure. We have to use 4 by 4 on both sides, thats total of 16 fets per channel, to get us noise wise to same level as 2 by 2 on se. I know is no big news to no one, but thats lots of precious fets. Balanced has it's price. I look further into some issues like dc coupling tomorrow. That ac shunting caps (C3,7,8,9 in attached) are kinda spoiling picture, maybe it could be fully symmetrical horizontally too, and we could make signal summing by running opposite mirrors together and rearranging fet inputs. Then it also had balanced out for those who might be interested. Just thinking out loud here. Also, just for fun I attached how #5083 problem could be solved. I call this fighting mirrors with mirrors. But thats not balanced, just not ground referenced. Node 43 is ready for servo, so this might be useful for making se dc coupled.
Attached Images
File Type: png #5108.PNG (47.8 KB, 292 views)
File Type: png Solved.PNG (39.7 KB, 293 views)
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Old 4th February 2012, 02:22 AM   #5122
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Sorry, i was out for some hours. I got a major boost i sound quality in my system today by just placing my MPL Slim Panels more optimally in my listening room. I am working at the same time on a second set of speakers with field coil drivers, the Sommerwind.
I had placed the Sommerwind behind the MPL Slims, so i can take away the panels and listen to the Sommerwind. That placed the MPL Slims very close to my listening seat and blocks part of the back radiation. I had already found that listening as far away from the panels as i can improved the soundstage but then i sit smack at the back wall.
Taking away the Sommerwind allowed me to place the MPL Slim some 15cm further away and i am sitting now maybe 10cm from the back wall. They radiate to the back now without blocking. The resulting sound is extraordinary. Much smoother and spacious without loss of focus. Wider, higher, deeper and more sweet without loss of detail or dynamics. Not so well recorded material sounds less hard and better resolved. Classical
sounds awesome. I can play now also old material from the 50th and 60th on Decca, EMI, DG, RCA, Mercury without listening fatigue where before was a slight and penetrating hardness. Violins, horns and percussion sound wonderful, so do voices and choirs. The sound is more balanced and better separated the same time. Tonal color of instruments are much more easy to differentiate, for example open against stuffed trumpet. The bass got better too because i sit somewhat less close to the back wall. I could advance the volume of my subs by some 1 - 2dB without any boomy-ness. So i have more bass in total, that is faster and cleaner. This is so far the best sound i got in this room. I am planing now to layout a floor plan that i will publish on my MPL thread for later reference. I really unlooked the magic of my room and that after living ten years in this building. I called my son and we did a listening session, later i stuffed the Paradise boards some more. I have now enough pairs of transistors. I have stuffed all transistors to my boards already and have enough well matched pairs to stuff Michaels boards too.
Sampler, this is very good news, i really love that circuit. I am now convinced that we can make it play just fine. I like the balanced out option too when it does not compromise the single ended output. The name for this stage is simply : "Masterpiece".
In German it has interestingly two meanings : Meisterwerk and Meisterstück.
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Old 4th February 2012, 02:38 AM   #5123
Salas is offline Salas  Greece
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Quote:
Originally Posted by Joachim Gerhard View Post
Here are some pictures of the Hulk at ETF2010 taken by Jan Didden. One picture also shows Martina with Garrard and Hulk. The Hulk is also known since as the "Cristal" out of obvious reasons.
Yes Salas, this is one with your Shunts.
Oh yes the chopped hypnotize. What is that crystal about? Damping the sinks with weight? Or just aesthetic addition for the nice prism led reflections?
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Old 4th February 2012, 02:45 AM   #5124
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Looking at the Samplers circuit again we really should make it Balanced In - Balanced Out
with Single Ended Out option. Balanced solves the hum issue ones and for all and this stage could drive Euvl´s Balanced F5 directly for example.
Converting a turntable wiring to balanced is easy. I already have a design with Klotz microphone cable that sounds very well and does not cost much to make. Also a balanced volume control is easy to make working in shunt mode, so it will sound very good. Say we have 66dB of gain and can throw out the preamplifier.
On another issue i am working on a list of my reference vinyl records and CD´s. Maybe this is helpful when we interchange listening impressions. Jose, did you get your Mercedes Sosa ?

Last edited by Joachim Gerhard; 4th February 2012 at 02:50 AM.
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Old 4th February 2012, 02:48 AM   #5125
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Salas, i think it is both. It lights up the room quite spectacular, illuminated by the Led´s on the Hypnotize. Funny enough we got more comments about the crystal then about the stage itself,
so mesmerizing it is. When that helps perception i am fine with it.
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Old 4th February 2012, 02:50 AM   #5126
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Thumbs down Mercedes Sosa

Hi Joachim,

Unfortunately they don't have it !
I think I'll look for it via ebay or an other way.

I'll let you know when it's in my hand


atb,


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Old 4th February 2012, 02:54 AM   #5127
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I say it again, i can get enough 2SJ74BL. When we buy 1000 they are less then 1,-€ a pop and original Toshiba. Problem is to buy just a few. I already got confirmation from Marcin about 300 so this will come together more easy then you think.
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Old 4th February 2012, 02:56 AM   #5128
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Yes, that record is out of print. I do not know if Tropical Music is still in busyness but when you find vinyl from this label, grab it it and bury it in the soil. It may be stolen soon otherwise.
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Old 4th February 2012, 04:37 AM   #5129
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"Just when you thought you needed them the most"
The input stage of the Balanced Masterpiece can be rearranged for DC coupled BJT.
Just for fun and for the P-Channel challenged.
Attached Files
File Type: pdf Masterpiece BJT Balanced input gain cell.TSC - TINA.pdf (6.0 KB, 115 views)
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Old 4th February 2012, 08:26 AM   #5130
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Quote:
Originally Posted by Joachim Gerhard View Post
I say it again, i can get enough 2SJ74BL. When we buy 1000 they are less then 1,-€ a pop and original Toshiba. Problem is to buy just a few. I already got confirmation from Marcin about 300 so this will come together more easy then you think.
Could you count me in for 100 maybe more Please

Tanks
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