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主旨寄件者更新日期
回覆 (1451): SPU
again
wadia
11-08-24
22:04:11
回覆 (1450): SPU
upload again
wadia
11-08-24
22:02:20
回覆 (1449): SPU
Jaspert, nice SPU setup......  
Let see my running A90, thanks David's midas touch.....
http://i42.photobucket.com/albums/e334/wadiar33/L1000726.jpg
wadia
11-08-24
22:00:40
回覆 (1450): SPU
Evil kong,  
 
You did not spot the phono !!!! You must be hanging about with 朋友 too much !  
 
daiwok
11-08-24
17:41:42
回覆 (1448): SPU
Cheers. The new SPU look right at home on the Schick & Commonwealth 12D pairing. It sounds fabulous. :)  
 
Ice,  
I'm using an old Fidelity Research XF-2 type L step up transformer into the MM input of Kevin Carter's K&K Audio Maxxed Out phono stage with the Commonwealth. But I will also try SPU on the Micro RX-5000/FR-64S -> Technics SH-305MC SUT and the tube phono stage shown below.  
 
Photobucket  
 
Photobucket  
 
 
 
 
jaspert
11-08-23
10:00:22
回覆 (1449): SPU
Evil kong,  
 
Ideas for your first floor. I am sure you spot the right components in this photo. Don't worry about that VPI TT, the owner is building a Lenco right now ^__*
daiwok
11-08-23
04:02:51
回覆 (1448): SPU
Very nice !!!! Great combo for sure !
daiwok
11-08-23
04:01:01
回覆 (1447): SPU
Jas, they look sweet! Commonwealth, Schick arm and SPU 90th Ans..... tasteful combination for discerning individual..... what phono do you use?
icefox
11-08-22
23:32:50
回覆 (1446): SPU
Got a small package from HK today. Thanks Wher. :)  
 
Photobucket  
 
Photobucket  
 
 
 
jaspert
11-08-22
23:02:17
回覆 (1445): SP 10 problems
 
Kong,  
 
Thanks again. I know I can count on you guys.  
According to my friend there is no IC in the MKI, so it may be easier to fix.  
kh33
11-08-22
20:17:33
回覆 (1444): SP 10 problems
 
KH, the webpage I listed below has schematics and user/services manuals for the MKI also.  
 
The MKI used a servo-controlled motor, instead of the quartz-lock control of the MKII. Don’t know whether it would be an easier fix than the MKII or not!  
 
thekong
11-08-22
18:46:04
回覆 (1443): SP 10 problems
 
Thanks so much for all the help.  
I was mistaken again, the model my friend had was mark one, which had a great difference from mark 2. It was all my fault.  
 
kh33
11-08-22
17:53:36
回覆 (1442): SP 10 problems
 
I think we may be able to identify the problem by looking at the symptoms.  
 
In Limage case, the symptom was some slight grinding noise at the main bearing (but I am not sure if the speed was affected), and the problem was with the capacitors.  
 
In my case, the strobe was jerking back and forth as viewed through the small window, but the bearing was smooth with no noise. Of course, the platter was not going backwards, just that the speed was unstable. The problem was with the speed controlling chip.  
 
So, KH, you may want to check with your friend on what the symptoms are.  
 
thekong
11-08-22
16:59:29
回覆 (1441): SP 10 problems
 
the problem could as simple as replacing some of the caps  
________________________________________________  
 
 
I am afraid not. It's the IC which is playing havoc with the speed and for which, being cursed viciously by thekong,  
there will be no cure.  
 
There is luckily separate IC for different speed. If it doesn't affect 33 rpm, just ignore it. Mine cannot run at 78 for years.  
 
limage
11-08-22
16:32:54
回覆 (1440): SP 10 problems
KH,  
 
I agree with Kong, the problem could as simple as replacing some of the caps dying at the power supply end.
daiwok
11-08-22
15:40:36
回覆 (1439): SP 10 problems
 
KH,  
 
Your friend can download the schematic and user/service manuals from the website below.  
 
About the speed problem, the cure could be as simple as changing some of the dying electrolytic caps, just like what Limage did.  
 
However, if the problem is with the speed controlling chips, there may be no cure, as even Technics/Panasonic doesn’t stock those chips any more. I was told that the SL1200 might use some of the same chips as the SP10MKII, but I could not confirm on that.  
 
I also have a SP10MKII in a similar situation, and both Panasonic and AvWalkman couldn’t fix it. However, there is hope on the horizon as our Mdlover is working on an all new controller for the SP10 !  
 
http://www.vinylengine.com/library/technics/sp10.shtml
thekong
11-08-22
12:48:22
回覆 (1438): SP 10 problems
No worries, I was just trying to be faster than Limage. Its my problem, not yours!  
 
Wow, the power supply - more complicated than a million dollar transistor amp power supply! Good luck!  
 
bobui
11-08-22
12:35:11
回覆 (1438): SP 10 problems
kh, I think Limage has all sort of cool documentation for this babe!!!
icefox
11-08-22
12:30:26
回覆 (1437): SP 10 problems
 
Bobui,  
 
Sorry I have not made it clear, it is Technics TT SP10 that my friend wants.  
Thanks for the help anyway.  
kh33
11-08-22
12:20:28
回覆 (1438): SP 10 problems
I think kh was talking about Techniques SP10 mk2  
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Silly me! First come first die! No reward for being nice here! No, just kidding!
bobui
11-08-22
12:18:19
回覆 (1437): SP 10 problems
bobui...... I think kh was talking about Techniques SP10 mk2 Turntable.... not pre amp from ARC......
icefox
11-08-22
12:15:02
回覆 (1436): SP 10 problems
can down load from here  
 
http://www.4tubes.com/SCHEMATICS/BY-BRAND/Audio-research/SP10PS_schematic1.gif
bobui
11-08-22
12:08:08
回覆 (1435): SP 10 problems
 
My friend has a SP 10 mark2 whose speed is out of control.  
Can any brothers help to obtain the circuit diagram for the power supply?  
 
kh33
11-08-22
11:33:24
回覆 (1434): New Toys List
>The Orbe platter is constructed of a proprietary, black acrylic material that contains vinyl and graphite to mimic the properties of LPs. It provides a perfect interface to the LP and is designed to dissipate resonance produced by the stylus (needle talk) to prevent it entering the playback loop……..<  
 
In reality the LP does not sit flat and is not, and can not be, strictly speaking, coupled to the platter, leaving a huge air gap in between. Refraction between the vinyl and air boundary renders most of the vibration generated by the travel of the needle go back and forth within the vinyl. Only a small portion of the energy is dissipated thru the air cushion and reaches the platter below. Again, there is refraction between the air layer and platter boundary so the propagation of wave(s) bears no resemblance to the hypothetical scenario in which the vinyl and platter behaves as a composite/continuum.  
 
Most turntable designers have had no formal training in vibration and are all groping in the dark. Rockport is perhaps one of the very rare exceptions.  
 
feikeung
11-08-20
01:26:05
回覆 (1435): New Toys List
 
>How do you find the sound of the Orbe?  
Is it muffle sounding and lacking the ultimate in sparkle and transparency? <  
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I had at the time also the SME V and the Clearaudio Signature. While everything sounded quiet detailed, it delivered a solid but non exciting sound. The SME V was not dynamic as some say it is, nor is the Orbe. At the time I did not think it was the Orbe or the SME V as I started to explore valve amps, higher efficiency speakers - but once those were sorted, I started to explore more arms and carts and found what we call "neutral"
daiwok
11-08-19
20:39:37
回覆 (1434): New Toys List
 
>How do you find the sound of the Orbe?  
Is it muffle sounding and lacking the ultimate in sparkle and transparency? <  
__________________________________________________________  
 
I also had the Orbe, paired with its most popular partner, the SME V, for a short while in the early 2000’s. While I wouldn’t call it as bad as muffled, the combo certainly lacked some of the liveliness that I got from some other TT combos.  
 
Of course, to be fair to the Orbe, the SME V also has similar characters.  
 
thekong
11-08-19
18:11:02
回覆 (1433): New Toys List
Some 25 years ago when I upgraded my Systemdek IIX from glass platter to acrylic, wow, that was a few months savings from working in a Chinese take away selling fish & chip and egg fried rice. I dont remember what improvement it has acutally made. I probably couldnt tell at the time when all I listened were Duran Duran, George Michael and Danny Chan .....etc. Life was more on looks than function when you were young and free! The cool thing in the 80s was in fact the remote of your CD player. Impress the girl everytime!  
 
Acrylic platter or high priced acrylic turntable looks cool in 21st century? Emmmmmmm, ok, the looks usually does impress women better than your black and grey square looking CD player!  
 
 
 
bobui
11-08-19
17:50:38
回覆 (1435): New Toys List
 
>The Orbe platter is constructed of a proprietary, black acrylic material that contains vinyl and graphite to mimic the properties of LPs. It provides a perfect interface to the LP and is designed to dissipate resonance produced by the stylus (needle talk) to prevent it entering the playback loop……..<  
__________________________________________________________________  
 
I suppose they would always claim to have the best solution :-)  
 
Proprietary material?!!! Can a small company like that really develop proprietary materials?  
 
thekong
11-08-19
17:48:54
回覆 (1434): New Toys List
 
 
 
' I think I bought my Orbe back in 1995 from Excel Hi Fi '  
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How do you find the sound of the Orbe?  
Is it muffle sounding and lacking the ultimate in sparkle and transparency?  
 
 
 
kh33
11-08-19
17:44:06
回覆 (1433): New Toys List
I think the Orbe’s platter is some form of black acrylic or Delrin, instead of pure vinyl!  
=====================================================  
I think I bought my Orbe back in 1995 from Excel Hi Fi  
 
 
The Orbe platter is constructed of a proprietary, black acrylic material that contains vinyl and graphite to mimic the properties of LPs. It provides a perfect interface to the LP and is designed to dissipate resonance produced by the stylus (needle talk) to prevent it entering the playback loop. It will also dissipate airborn or ambient noise which the chassis may pick up. There are significant improvements to soundstage, dynamics, bass extension and tautness as well as timing and timbre. The silence between notes is greater due to noise reduction.
daiwok
11-08-19
17:22:46
回覆 (1432): New Toys List
 
>I think John Michell did that with the Orbe ..... still sounded dead to me - which some call neutral @[email protected] !<  
__________________________________________________________  
I think the Orbe’s platter is some form of black acrylic or Delrin, instead of pure vinyl!  
 
 
 
>isn't that what is meant by neutral? since it is dead, there is no preference to any particular sound. hence absolute neutrality.<  
___________________________________________________________  
 
I suppose there is a difference between the material is dead/inert, and sounding dead which means it has some interference/coloration that robs the liveliness out of the music during reproduction.  
 
However, I really wonder whether it is even possible for the platter to “over damp” the LP in this context, as the LP is suppose to be as stable, and as vibration/resonance free, as possible after all!  
 
Instead, I think it is the platter’s relative absorptive/reflective characteristics to vibration (even minor ones caused by the stylus tracing the groove), and its resonance signature, that make the difference. Acrylic just has their only coloration or sound signature that make it sounds less lively than some other materials.  
 
Of course, advocates can always claim acrylic is actually neutral, while other materials add coloration/resonance which some audiophiles prefer and call it liveliness!  
 
 
thekong
11-08-19
17:14:17
回覆 (1431): New Toys List
My copy arrived just now. I also have yours Evil Kong
daiwok
11-08-19
16:19:06
回覆 (1430): New Toys List
still sounded dead to me - which some call neutral @[email protected] !  
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isn't that what is meant by neutral? since it is dead, there is no preference to any particular sound. hence absolute neutrality.
drwkng
11-08-19
15:53:49
回覆 (1429): New Toys List
Yeah, if it is really a good idea to match the resonace frequencies, why not make the whole platter out of vinly?  
======================================================  
 
I think John Michell did that with the Orbe ..... still sounded dead to me - which some call neutral @[email protected] !
daiwok
11-08-19
14:45:09
回覆 (1428): New Toys List
 
>The argument is that the reasonace frequency is very close to vinyl. No, I don't buy that!<  
___________________________________________________________________  
 
Yeah, if it is really a good idea to match the resonace frequencies, why not make the whole platter out of vinly?  
 
 
thekong
11-08-19
14:22:20
回覆 (1427): New Toys List
I think the 2 main reasons are relatively cheap in manufacturing and it does look good!  
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The argument is that the reasonace frequency is very close to vinyl. No, I don't buy that! If so, why not use acrylic for tonearm, bearings, chassis, motor housing and basically everything else!  
 
Easy to make, no molding, cheap to produce, easy to make it look ok. And the result is usually over damped!  
 
bobui
11-08-19
13:02:35
回覆 (1426): New Toys List
I wonder if I can mold this vinyl horn ?  
 
daiwok
11-08-19
12:17:14
回覆 (1425): New Toys List
I wonder why so many TT choose to use acrylic platters. Over damped can be just as bad.  
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A Clearaudio favourite !
daiwok
11-08-19
11:48:25
回覆 (1424): New Toys List
 
>I wonder why so many TT choose to use acrylic platters.<  
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I think the 2 main reasons are relatively cheap in manufacturing and it does look good!  
 
 
 
>air tangent was launched before the Rockport<  
________________________________________________________  
 
That is very true! However, the Airtangent is a low pressure design, while the Rockport uses high pressure!  
 
 
thekong
11-08-19
11:35:46
回覆 (1423): New Toys List
 
I don't like acrylic platters, particularly when they are paired with locking record weights. They always sound a little muffled  
to my ears, lacking the tiny bit of sparkle and sheen which render that delightful sense of transparency in music reproduction.  
 
I wonder why so many TT choose to use acrylic platters. Over damped can be just as bad.  
 
limage
11-08-19
10:52:39