Thursday, March 22, 2012

new strobe lamp

the original neon bulb of the SP10MKII was confirmed dead.




I removed the original neon bulb and tried to make an alternative.
the strobe circuit of the SP10MKII is "flashing" at a frequency of about 105Hz at 33 1/3 rpm and about 142Hz at 45 rpm.
using LED(s) to replace the neon lamp is easy and simple.
I've made a small PCB that use the original neon mounting holes.





in order to keep it compact, SMD LEDs were used (size 0805), there is a total of three LEDs driven by a small transistor. everything is powered by a single 5V DC (from the SP10KII control board)





it looks cool, isn't it?





everything just fit to the original neon bulb mount and it also runs cooler.





yeah, here we go, the orange LEDs looks pretty good.

I can remove the 140V DC supply section now as it's only used to power the neon blub which is no longer used anymore.

Friday, March 2, 2012

new psu for the SP10

since the Technics SP10 didn't came with the original PSU, i have to build one to check its operation.

the table need +5V, +32.5V and +140V DC. and this is how it looks,



and the front,




and bingo, the SP10 is turning now but the strobe is not working, maybe a doggy neon bulb?

Thursday, February 23, 2012

checking the table

the inside of the SP10II is clean and after visual check, no sign of burnt parts.




and this is the oscillator and frequency divider board, again it's clean and decent. i will change all the E-caps anyway before i proceed.


Monday, January 23, 2012

unpacking a new turntable

my new Technics direct drive turntable (SP10 mark II) has arrived finally.

the table is missing the original power supply and i will build one to make it turn. the first inspection is quite positive, it's clean and a smooth turning motor.

next is to build my custom designed motor controller. :-)










Thursday, November 10, 2011