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Old 10th May 2002, 04:53 PM   #1
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Default Turntable image

Another gratuitous image from:

http://www.audio-consulting.ch/refsystem2002version.htm

I will now wait for the slings and arrows.....
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File Type: jpg platinenuitseule.jpg (26.8 KB, 1104 views)
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Old 10th May 2002, 05:56 PM   #2
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C-37 is contagious! It is everywhere now.

Did anyone catch the "LCR RIAA" eq? Not sure I would use inductors to pick up radiated stuff in a low-level unit, but then, what do I know.

Jocko
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Old 10th May 2002, 06:52 PM   #3
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Exclamation What DO you know?

Tell us! Good point on noise pick up, was that a sling or an arrow?
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Old 10th May 2002, 07:01 PM   #4
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Not much. I think it was a barb.

Jocko
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Old 10th May 2002, 07:23 PM   #5
dice45 is offline dice45  Germany
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Jocko,

the this pix you posted is most probably a platter weight with built-in strobe light. The strobe dots are the leds flashing with a very short duty cycle and if the platter is at correct speed, the lighted dots seem to rest, otherwise the seem to run CW or CCW, depending on the speed being to high or too low.

The rest looks quite fancy, and i would not second to use wood as a platter mat. The only correct impedance match for vinyl is vinyl.

LCR RIAA:
much more expensive taste than the illuminated platter weight .
fellow Munich Triode Mafioso Thomas Mayer (vinylsavor) uses such, i guess he uses the Tango RIAA. I haven't yet fully understood why this works and works so $%&in' good, but it does. It's magic.

C37:
ask me after i have tried it out on a plywood tonearm wand of my mechanical linear tracker soon to come. There are many folks having tried it out and loving it and mayny claiming it never can work and never having tried it out.

i am undecided, curious. Just the price, somehow resmebles snale oil. Main ingredience: stiffening varnish. Used to get the wrinkles out of paper or fabric covering airplane wings. Guess i will have to compare c37 and the stiffening varnish brand smelling like c37
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Old 10th May 2002, 07:32 PM   #6
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Talking Credit where credit is due.

Picture brought to you by H.H. the leading poster of gratuitous images. I would try C37, I'll try anything once. It is just the proposterous explanation of how it works that amuses me. I could tell a better lie than that with 5 minutes preperation. I believe the correct term is Snake Oil. I do use shark's liver oil on my contacts though.
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Old 10th May 2002, 09:55 PM   #7
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Quote:
Originally posted by dice45
LCR RIAA:
much more expensive taste than the illuminated platter weight .
fellow Munich Triode Mafioso Thomas Mayer (vinylsavor) uses such, i guess he uses the Tango RIAA. I haven't yet fully understood why this works and works so $%&in' good, but it does. It's magic.
Mick Maloney in Oz has an LCR phono pre that good press so Thomas' phono stage is not unique in this respect.

Click the image to open in full size.

dave
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Old 10th May 2002, 10:29 PM   #8
dice45 is offline dice45  Germany
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Harry,

sorry, i apologize. I could swear it was Jocko. Alz... Alz... Alz.. cannot remember the disease's name, but it has one advantage, one gets acquainted with new people every day

LCR RIAA: i am out for it. Although i love the sound. but for having different EQs, it is better to have a split passive EQ where every pair of time constants can be calculated precisely. and for changing EQ, i do not have to change all 4 time constants; if luck i can keep one pair and change the other.

Oops, forgot, phono has 3 time constants, but the 4th is not standardized and in most cases forgotten. It is caused by the upper BW limit of the cutting head's amplifier. Otherwise the cutting amp's gain would have to rise to infinity and the cutting head's coils would go smoke. Allen Wright and Morgan Jones both recommend to assume 3.18s as 4th time constant. Try it out folks, the difference is amazing.

Unfortunaltely such stunts are next to being impossible with a compound 3-time-constant LCR RIAA.
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Old 10th May 2002, 10:33 PM   #9
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Angry I could swear it was Jocko

People get us confused. I am quite sure most of the abuse I am getting was actually meant for Jocko!
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Old 11th May 2002, 03:28 AM   #10
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Default Time Constants

So how does one calculate the time constants? My DIY phono stage is a passive RIAA circuit sandwitched between an Instrumentation amp and an opamp. It only has the standard 3 time constants, swipped from the Analog Devices systems application guide. I'd like to add in the Neuman cutting head 50kHz time constant, even if it means splitting things up and putting in another gain stage. This is for solid state (opamps).

Thanks
Ron
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