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回覆 (37): my national rice cooker diary
 
 
Nice info Ben. I did in fact had my unit's power supply re-capped 4 years ago but I did not fine tune the voltage. Would try it sometime later.  
 
Thanks :-))  
 
 
 
limage
14-08-02
10:47:17
回覆 (36): my national rice cooker diary
Limage,  
 
My SP-10 78rpm is also failing. I searched before and found this:  
 
http://www.vinylengine.com/turntable_forum/viewtopic.php?t=47868  
 
Not that I would fix it as 33/45 are all I need (My experience tells me not to fix anything unless I really need to) but it does make it sound like an easy fix and kind of give me a peace of mind.  
 
 
Cheers,  
Ben
BenYC
14-08-02
10:32:53
回覆 (35): my national rice cooker diary
 
C-fu,  
 
The gang drug me and now I have an exact shit ... not even Lenco, a Bogen 61, so I call it a fake Lenco. I don't even know what to do with it, nothing works and I have to "work" on it before I can play a record. But I never seen an idler wheel table ever, so this is going to be fun ....  
 
Looks like DIY project building up, I haven't even glue my 2 pair ESL-63 ... This will keep me busy the next 5 years.
Cadiver
14-07-31
14:38:58
回覆 (34): my national rice cooker diary
 
 
you can join the idler club which is brewing underground members !  
__________________________________________________  
 
 
 
Not a very bad idea! Okay I'll get a shit Lenco when the time comes.  
 
 
limage
14-07-30
09:29:04
回覆 (33): my national rice cooker diary
Master Limage,  
 
You can have my rice cooker, but you got to wrestle it off Nicknick. Or you can join the idler club which is brewing underground members ! 8^)
daiwok
14-07-29
19:57:53
回覆 (32): my national rice cooker diary
 
 
The SP10 Mk3 is not any younger. What if it should age like the Two does?  
 
Well luckily we have mdlover's mod to the rescue. Worst coming to the worst, we'll have the whole quartz lock modernized.  
 
limage
14-07-29
15:59:30
回覆 (31): my national rice cooker diary
 
Looks like it is about time for you to upgrade to the SP10 MK3 ;-)  
 
http://page6.auctions.yahoo.co.jp/jp/auction/f142896955
thekong
14-07-29
15:26:26
回覆 (30): my national rice cooker diary
 
 
I used to have a small problem with my SP10-II. 78 rpm has been operating intermittently for quite a while. I wouldn't play 78 LPs with my Ortofon A90, but I would, every now and then, run the 78 speed to keep the thing in good condition.  
 
A month ago, this speed refused to work. It was running much faster. It doesn't hurt at all since I don't play 78 LPs anyway but it leads me to fear that other speeds would likewise stop to work one after another. Fingers crossed!  
 
limage
14-07-29
14:26:36
回覆 (29): my national rice cooker diary
原來之前哥件唔係原裝膽...... @[email protected]  
 
兩粒膽仔黑晒
mdlover
13-06-21
23:40:25
回覆 (28): my national rice cooker diary
opps......
mdlover
13-06-21
23:35:32
回覆 (27): my national rice cooker diary
lucky, lucky, just got this original neon bulb from another non-working SP10MKII.  
 
mdlover
13-06-21
23:33:19
回覆 (26): my national rice cooker diary
>This is how good the EMT's ability to track.<  
_______________________________________  
 
We need to try that on Alan Soo's EMT then! :-)  
_______________________________________  
 
咁又既有水平bor,D Statement都應該吾得咁bor. @@
icefox
12-04-11
12:02:36
回覆 (25): my national rice cooker diary
 
>This is how good the EMT's ability to track.<  
_______________________________________  
 
We need to try that on Alan Soo's EMT then! :-)  
 
 
thekong
12-04-11
08:13:27
回覆 (24): my national rice cooker diary
 
 
This is how good the EMT's ability to track.  
 
Photobucket  
 
cpsjj
12-04-11
00:07:33
回覆 (23): my national rice cooker diary
 
 
what is those "cards" inside the wooden box under the table? phono amp?  
________________________________________________________________  
 
Dummy cardboards. Just want to make it to look like an EMT.:-)  
 
Photobucket  
 
Photobucket  
 
cpsjj
12-04-10
23:54:12
回覆 (22): my national rice cooker diary
CP,  
 
glad to know you also own a SP10.  
 
just curious, what is those "cards" inside the wooden box under the table? phono amp?  
 
btw, you've got PM.
mdlover
12-04-10
21:36:15
回覆 (21): my national rice cooker diary
 
 
mdlover,  
 
My BBC SP10 also needs a new power supply.  
 
Photobucket  
 
Photobucket  
 
 
cpsjj
12-04-06
18:35:58
回覆 (20): my national rice cooker diary
kong,  
 
will check your rice cooker soon.  
 
 
mdlover
12-04-06
13:44:55
回覆 (19): my national rice cooker diary
do let me know. i need them^-^  
-------------  
 
sure, let you know 30 years later. :-P
mdlover
12-04-03
12:26:35
回覆 (18): my national rice cooker diary
this LED replacement will last for more than 30years if not forever, i'm afraid. :-)  
-----  
i'm sure you are dreaming. LED has a much shorter life span unless they are not on at all. if you find one LED with 30 years life span, do let me know. i need them^-^
drwkng
12-04-03
11:21:14
回覆 (17): my national rice cooker diary
getting the original spec. neon is impossible and this LED replacement will last for more than 30years if not forever, i'm afraid. :-)  
mdlover
12-04-02
22:36:52
回覆 (17): my national rice cooker diary
Just sharing -  
 
No one like the original plith of SP10, I used to blame its rubber feet. Last nite, I moved the turntable and put it on a normal shelf. With just the rubber feet, it actually sounds very good. For those that still keep the original plith, it maybe fun to just place the SP10 on non-hifi rack. This can be the missing piece of the puzzle.  
 
(This incident kind of reminds me of a garrard.)  
BenYC
12-03-30
22:26:38
回覆 (16): my national rice cooker diary
 
 
Nice job, Albert. I like the speed indicator in red but then wouldn't it be easier just to replace the bulb, which should be good for another 30 years of service?  
 
 
limage
12-03-30
13:55:47
回覆 (15): my national rice cooker diary
"The ICs are no longer available" was the answer I got from Shun Hing years ago.  
---------------------  
 
well, it's a common but complicated issue ....... when original parts discontinued, authorized agent dare not to use or recommend substitutes.  
 
 
 
the neon bulb went south, i simply cut and remove it from the table.  
 
 
 
 
i have decided to make an alternative and the strobe circuit is "flashing" at a frequency of about 105Hz @33 1/3 rpm and 142Hz @45  
the next step is to replace the neon lamp with some LEDs, i have made a small PCB that is supposed to be mounted to the original position of the neon bulb  
 
 
 
 
in order to keep it small, surface mount LEDs were used and this little board is powered by a single 5V DC ( the neon bulb is powered by 140V instead).  
connecting the board to the SP10, it's cool. :-)  
 
 
 
 
after checking, everything is mounted back to the table and it fits nicely to the original bulb mount.  
 
 
 
 
final check and bingo.  
 
 
 
 
now the 140V DC supply rail is not needed anymore, i have removed it from the PSU.  
what come next is mechanical check like bearings, shaft and motor, etc.
mdlover
12-03-29
17:13:17
回覆 (14): my national rice cooker diary
 
 
The stroboscope on mine also went out 2 years ago but as soon as I had the power supply serviced by replacing all the electrolytic caps, it has since been operating flawlessly.  
 
"The ICs are no longer available" was the answer I got from Shun Hing years ago.  
 
It's absolutely wonderful to know that we have a member here who would be able to fix the damn thing after you've gone through this restoration inside out!  
 
 
limage
12-03-29
10:22:19
回覆 (13): my national rice cooker diary
i don't think SP10mkII has any IC that is proprietary, all the chips you see in the photo are just standard off-the-shelf logic ICs, they are all from Mitshibishi with a different part number.  
 
for example, the chip reads SVIM53200P is just a plain 2-input NAND gates..... :-)  
 
 
but the later SP10mk2A has some unique LSI from Matsushita.  
 
mdlover
12-03-28
19:22:26
回覆 (12): my national rice cooker diary
gee.....one photo is missing?  
 
 
mdlover
12-03-28
19:08:11
回覆 (11): my national rice cooker diary
all-in-one design which incorporates the power supply along with accurate speed control in one tiny little box!  
--------------------  
 
limage,  
 
that is what i have planned to do. :-)  
 
 
 
the original power suppply provides three different voltages, +5V, +32V and +140V DC  
new power supply according to these voltages was made to feed the SP10,  
 
 
 
 
and bingo, it's working.  
 
 
 
the only bad thing is the stroboscope not working, may be bad neon bulb.  
 
more updates to follow.
mdlover
12-03-28
19:03:58
回覆 (15): my national rice cooker diary
The stock plinth is just shit. Even if you have it put upon the best of Minus K isolation tables, it would still give you acrylic plated sound. Slate is a must!  
_________________________________________________  
 
This is the part I still cannot understand to date. SP10 is quite a fine table. How come it comes with such a odd plinth. In stock condition, the 4 rubber feet blur up everything. If one try to replace the feet with spikes underneath... even original plinth can be good. Why using those rubber? I suspect this is to match other Jap gears at that time which can be agressive at mid high freq.
BenYC
12-03-28
16:32:43
回覆 (14): my national rice cooker diary
 
 
the SP10 MK11 is a very robust design that rarely has trouble  
___________________________________________________  
 
Very true, esp the motor which has been made to run unto the end of the world without a wince.  
 
 
 
both of us were using the stock plinth  
_______________________________  
 
The stock plinth is just shit. Even if you have it put upon the best of Minus K isolation tables, it would still give you acrylic plated sound. Slate is a must!  
 
 
limage
12-03-28
15:56:45
回覆 (13): my national rice cooker diary
While complicated, the SP10 MK11 is a very robust design that rarely has trouble. Of course, due to its age, all the E-caps should be replaced.  
 
The main problematic area of the rice cooker is with some of the speed control chips, which even Technics doesn’t stock anymore. The good new is mdlover told me substitutes can probably be found. I have a rice cooker with erratic speed problem and mdlover is going to pick it up as a workhorse to find the fix. So Limage, if your main concern is just to keep the rice cooker turning in stock condition, you can sleep well.  
 
However, there is something more exciting about making an all new controller. There is a thread on Audiogon which started out talking about TT speed accuracy, and then branched out into which TT maintain speed better, and whether tighter control (more corrections per second) makes a TT sound good! Some theory says too tight a control could create an effect kind of like jitter in digital, and make the sound cold.  
 
The SP10 is a tight control design and both diawok and I think it is very neutral sounding, but lacks some of the colors of our other TTs. But then, both of us were using the stock plinth, so that could also be the problem.  
 
As I am interested in taking out the SP10’s motor and put it directly in a slate plinth, I am having discussion with mdlover on making a whole new motor controller. If he can built in some kind of adjustable control in the servo system, we may be able to tune the TT to fit individual system/preference.  
 
thekong
12-03-28
15:25:36
回覆 (12): my national rice cooker diary
 
 
No, I'm not joking, Ben.  
 
The SP-10 may develop speed lock problems after so many years of service but this problem can no longer be repaired due to the fact that the relevant IC is not available any more. In other words, the turntable may turn into scrap anytime.  
 
For rice cooker users, it would be a great relief if all you need is to order that tiny little box.  
 
limage
12-03-28
15:17:39
回覆 (11): my national rice cooker diary
Er... An SP10 without all the complicated bozzo will not be an SP10. I am quite sure you are just joking here. Just afraid new comers around does not spot it and take the lines on face value.  
 
;-)  
 
BenYC
12-03-28
14:33:32
回覆 (10): my national rice cooker diary
 
 
mdlover,  
 
Are you not going to replace the PC board with something simpler as well as more up to date?  
 
This original design dates back some 40 years and it is unnecessarily complicated over the quartz lock loop which, I suppose, can now be resolved with just one chip or two.  
 
Quite a number of National users, myself included, are looking forward to your all-in-one design which incorporates the power supply along with accurate speed control in one tiny little box!  
 
 
limage
12-03-28
13:51:52
回覆 (9): my national rice cooker diary
this is the inside and again, very clean and no sign of repair or modification  
 
 
 
 
the crystal oscillator and frequency divider board  
 
 
 
 
all the E-cap will be replaced.
mdlover
12-03-27
17:36:06
回覆 (8): my national rice cooker diary
Thanks for the tips.  
 
Next time I service the rice cooker, I will follow the same and pull out the unneeded.  
 
Cheers.
BenYC
12-03-27
11:44:23
回覆 (7): my national rice cooker diary
here is my rice cooker  
 
 
besides cooking rice, I also use it to cook my power cables, so anyone can lend me an ODIN to try out, I will not charge for this service ! at the moment my rice cooker is using a Belden 8^)  
 
PS - I have not forgotten mdlover, I have your body here ..... just need to find time to meet ! @@ or I will pass it to your badminton buddies !  
daiwok
12-03-25
21:25:11
回覆 (6): my national rice cooker diary
i have disabled the mechanical brake, the metal stripe removed and the solenoid disconnected.  
 
i just hate the sound from the solenoid every time when i start/stop the table. :-)
mdlover
12-03-25
01:01:35
回覆 (5): my national rice cooker diary
 
 
Hi Ben,  
 
Honestly I don’t think there are much sonic advantages removing the brake, but I’m sure there is no harm done. What I want is to make it simpler and therefore less to worry about.  
 
 
 
 
limage
12-03-24
17:10:31
回覆 (4): my national rice cooker diary
Long time not checking in. Greetings. :-)  
 
 
Kind of curious about the brake of sp10, does it also serve as a silencer to reduce wobbling of platter? I never temper with mine and actually don't know the brake works this way. Is removing the brake a big plus or does it come with compromise? Hope to know more. Thanks.  
 
:-)  
 
 
 
BenYC
12-03-24
10:44:46
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