Idler Wheel Turntables |
<   >   1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85
 
*** ﹝請按主旨作出回應﹞ ***
主旨寄件者更新日期
回覆 (1923): Null point calculation
Evil Kong and I have a very interesting story to tell you about Master Limage and testing of linear trackers !!! ^__^  
-------------------------------------------------------------------------------  
My girlfriends (bikes) are no where near in taking up all my leisure time! I am still very much in love with Wine and Audio lor! Dont be shy la!
bobui
12-10-16
15:44:08
回覆 (1923): Null point calculation
 
Theory aside, my experience is that air-bearing linear trackers have always given me superior performance in terms of soundstaging and air. The only down side, other than the necessity of having a compressor, is that they MAY have slightly less bass weight when compare to SOME of the best pivotal arms.  
 
Interesting to note that two of the very few manufacturers of both cartridges and tonearms opt for heavy horizontal moving mass tonearm designs. The flagship of ClearAudio is, of course, a linear tracker. Then the Dynavector 507 also purposely design with the horizontal mass 3-4 times higher than conventional arms, and add to it the electro-magnetic damping!  
 
Do they know something that we don't ?  
 
thekong
12-10-16
15:42:56
回覆 (1922): Null point calculation
i do trust the Hi Fi News test record  
==========================  
 
You better be careful what you test and which version you have ! Evil Kong and I have a very interesting story to tell you about Master Limage and testing of linear trackers !!! ^__^
daiwok
12-10-16
15:29:55
回覆 (1921): Null point calculation
linear tracking arms just cannot pass the trackability tests.  
-------------------------------------------------------------------  
 
I knew I have to try setting up a linear tracking arm to see for it myself on it s pros and cons but thats just not very good news lor! I mean, what good does the the constant "Null point" do if a linear tracking arm doesnt actually track well or cannot pass the HI Fi News record trackability tests.  
 
I must say, i do trust the Hi Fi News test record. Probably one of the most practical of the many i have tried!  
 
 
bobui
12-10-16
15:13:37
回覆 (1920): Null point calculation
 
 
why wouldnt it not apply to a cartridge with greater tracking force  
_____________________________________________________  
 
 
Because the tracking force alone is heavy enough to keep the stylus well seated against side thrusts. Simply put, grossly overweight!  
 
 
limage
12-10-16
14:40:31
回覆 (1919): Null point calculation
 
 
With linear tracking arms, you've driven out the tiger but draw in a pack of Hyenas. Constantly deflecting cantilever is one, cantilever fatigue another, not to mention the jet of air adding alienating signal to the output.  
 
Try the HiFi News test record, linear tracking arms just cannot pass the trackability tests.  
 
limage
12-10-16
14:34:29
回覆 (1918): Null point calculation
 
 
Very true Kong. This is what has happened.  
 
 
limage
12-10-16
14:14:42
回覆 (1917): Null point calculation
Gents, to make things worse, the disc is not flat, & can be even off centered.
Derek2A3
12-10-16
14:13:41
回覆 (1917): Null point calculation
>if a linear tracking arm can simulate the cutting head, then i suppose by definition there shouldn't be any tracking error. Right?<  
_____________________________________________________________  
 
That should be the case under ideal circumstances. However, some claims that the relatively high horizontal moving mass may cause a deflection at the cantilever, therefore making some constant (relatively) tracking error through the whole LP!  
 
 
thekong
12-10-16
14:10:27
回覆 (1916): Null point calculation
if a linear tracking arm can simulate the cutting head, then i suppose by definition there shouldn't be any tracking error. Right?
drwkng
12-10-16
14:02:31
回覆 (1915): Null point calculation
no luck for mac user. can't even get a simple compiler installed. too bad.  
---------------------------------------------------------------------------------------------------------  
 
time for you to write an APP !!!
daiwok
12-10-16
14:01:06
回覆 (1915): Null point calculation
Actually, for a linear tracker, every point on that line is a null point ! :-)  
-------------------------------------------------------------------------------------------------------  
 
Geez, did not realise how far I had gone ...........
daiwok
12-10-16
14:00:37
回覆 (1914): Null point calculation
no luck for mac user. can't even get a simple compiler installed. too bad.
drwkng
12-10-16
13:24:10
回覆 (1913): Null point calculation
 
> I don't think it has any null points on it !<  
_______________________________________  
 
Actually, for a linear tracker, every point on that line is a null point ! :-)  
 
thekong
12-10-16
12:54:31
回覆 (1912): Null point calculation
Evil Kong,  
 
the hand drawn signed protractor I made for you from scrap card paper which I found in your den, I don't think it has any null points on it ! @@
daiwok
12-10-16
12:39:33
回覆 (1911): Null point calculation
 
 
I have a curve showing the distortion figures too, but these calculations are quite meaningless unless the stylus is perfectly cut.  
 
The problem is, most stylus are rarely perfect and those that are, rarely sound good.  
 
------------------------------------------------------------------------------------------------------------  
Then the question boils down to perfect setup ...... everything is just a guide, the most important component is ones ear !
daiwok
12-10-16
12:38:44
回覆 (1911): Null point calculation
when the tracking force is over 2.2g  
----------------------------------------------------------  
 
Whenever I use the HI Fi News test record for cartridge and tonearm setting. I sometimes hear buzz sound coming from one speaker only on some of the test tracks and the anti-skake help to get rid of that buzz. And most of these test tracks were actually meant for testing the left and right tracking balance which require the user to adjust the anti-skate force to balance out the buzz sound.  
 
Since this anti-skate does work well on almost all my of my cartridges, i kind of have this strange feeling that if it works for cartridgge of 2.5g tracking, why wouldnt it not apply to a cartridge with greater tracking force.  
bobui
12-10-16
12:26:00
回覆 (1910): Null point calculation
 
 
I have a curve showing the distortion figures too, but these calculations are quite meaningless unless the stylus is perfectly cut.  
 
The problem is, most stylus are rarely perfect and those that are, rarely sound good.  
 
 
limage
12-10-16
12:25:33
回覆 (1909): Null point calculation
similar is not the same, and "you always need more than one !"...... you have not heard this expression in the audio circle ? 8^)  
--------  
o.k let see what i can do. haven't done any programming on the mac so it might take me a few hours to sort things out.
drwkng
12-10-16
12:21:55
回覆 (1910): Null point calculation
 
 
when the tracking force is over 2.2g  
_____________________________  
 
 
I would say you don't need anti-skate beyond 3 gram tracking force.  
 
limage
12-10-16
12:12:27
回覆 (1909): Null point calculation
 
By the look of the anti-skating mechanism on the FR64s, I think its anti-skating force changes when the arm tracks inward. Can any mechanical experts let me know whether this is true?
thekong
12-10-16
12:07:06
回覆 (1908): Null point calculation
if you have a similar software, why do you need a mac version. mac is for aliens not earthlings.  
-------------------------------------------------------------------------------------------------------------  
similar is not the same, and "you always need more than one !"...... you have not heard this expression in the audio circle ? 8^)
daiwok
12-10-16
11:57:32
回覆 (1907): Null point calculation
Why some tonearms dont have antiskate machanism? Is it not a must to have an antiskate force?  
-----------------------------------------------------------------------------------------------------------  
 
It is not a must. In general when the tracking force is over 2.2g you will find little effect from use of anti skate. My Schick arms have no anti skate.
daiwok
12-10-16
11:56:27
回覆 (1906): Null point calculation
Do you have a mac version ? @@  
---------  
if you have a similar software, why do you need a mac version. mac is for aliens not earthlings.
drwkng
12-10-16
11:41:16
回覆 (1906): Null point calculation
what about antiskate ?  
--------------------------------------  
 
Why some tonearms dont have antiskate machanism? Is it not a must to have an antiskate force?
bobui
12-10-16
11:40:46
回覆 (1905): Null point calculation
Do you have a mac version ? @@  
 
BTW - I have a similar software myself fi anyone is interested ..... but why bother when you can have linear tracking ?  
 
Null point is one thing ..... what about antiskate ?  
 
antiskate - it can only be correct at one certain point IMHO. The antiskate force is a variable as the tonearm moves towards the spindle, I know Graham has a very clever magnetic device, so I guess the magnetic strength increases as you move towards the spindle, other than this one, most antiskate devices are just made up arm chair engineering and are not accurate. I know Master Limage has his own version of antiskate which he has tweaked. Honestly speaking, has anyone really done the calculation on the force created by antiskate x length of string ? measuring if this is correct is also difficult you only measure with a record playing a constant antiskate tone for the full length of the LP and not just one track.
daiwok
12-10-16
11:33:35
回覆 (1904): Null point calculation
Here is a program that Ivan asked to look at. i must say i didn't have much time to understand what/why he needs this program. but here you are. this will calculate the point where the maxium distortion ie tracking error. it is pretty simple to use. so have fun.  
 
http://www.gnostictechnology.com/Download.html
drwkng
12-10-16
10:53:59
回覆 (1903): EMT
I am missing one of these ....... time to arrange  
 
daiwok
12-10-16
10:00:16
回覆 (1902): Precious broken cart
Talk about inflation .......
http://www.ebay.co.uk/itm/garrard-301-schedule-1-grease-bearing-turntable-1954-/251168130978?ssPageName=ADME:B:SS:US:3160
daiwok
12-10-16
09:32:41
回覆 (1901): Precious broken cart
EMT。。。。e。。。。神!@@
icefox
12-10-16
01:51:09
回覆 (1900): Precious broken cart
This should be good enough for Soo爺!
icefox
12-10-16
01:49:31
回覆 (1899): Precious broken cart
My cousin has more 文化, obviously。。。  
 
icefox
12-10-15
11:39:04
回覆 (1898): Precious broken cart
icefox,  
 
your cousin ?
daiwok
12-10-15
11:23:22
回覆 (1898): Precious broken cart
icefox,  
 
your cousin ?
daiwok
12-10-15
11:23:21
回覆 (1897): Precious broken cart
This one of the rarest carts in the world and not many survived. A real collectors item.
daiwok
12-10-15
10:41:33
回覆 (1896): Precious broken cart
Look at how much this broken cart will end.......  
 
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=160895586738&fromMakeTrack=true&ssPageName=VIP:watchlink:top:en
icefox
12-10-14
22:49:17
回覆 (1895): Mono fix
Photobucket
daiwok
12-10-03
22:37:31
回覆 (1894): Mono fix
Not a dedicated Mono Phono, but this is the bits for the VSPS - Very Simple Phono Stage .... cost is like HKD 200 @@  
 
Photobucket  
 
started soldering last night after the GE Mono carts .....  
 
Photobucket  
 
Photobucket  
 
just need some RCA sockets and 2 batteries and we will be rocking !
daiwok
12-10-02
18:16:44
回覆 (1893): Mono fix
stylus profile change cannot be any easier now ....  
 
Photobucket  
 
depress and you can select Shellac 78's or 45/ 33 RPM LP mode  
 
Photobucket  
 
Photobucket  
 
Photobucket
daiwok
12-10-02
17:36:18
回覆 (1892): Mono fix
Been trying to catch up with the number of projects building up .... first the GE Mono cartridges .. these only have 2 pins and they need a modification to normal headshells in order to swing the stylus change .....  
 
 
the connection wires had to be soldered as a pair  
 
Photobucket  
 
then soldered to the large pins  
 
Photobucket  
 
Photobucket  
 
modifications to open up the top of the headshells  
 
Photobucket  
 
Photobucket  
daiwok
12-10-02
17:34:47