ผมสั่งซื้อไปแล้วนะครับส่วนราคานั้นเดี๋ยวจะแจ้งให้ทราบอีกที
วงจรพร้อมอุปกรณ์
Hi,
Please find attached the latest version of the KWAK-CLOCK.
Compared with earlier versions it has more bass slam and punch and less
glare.
The pot is adjusted for best waveform on the scope (50% duty cycle).
You can use the crystal from the CDP.
The KWAK-CLOCK will work with any crystal in the range 8 to 24.576 MHz.
The KWAK-CLOCK will dramatically improve the sound of your gear and is
considered better than the LCaudio.
Instructions for installing are on the Audiocom and LCAudio website.
<http://www.lcaudio.dk>
With a 50 Ohm home-made probe a squarewave can be seen on the scope. My
home-made probe consists of a 50 Ohm coax cable and 50 Ohm from core to
ground at the scope end.
An ordinary probe gives kind of a distorted triangular wave shape.
If you have a scope with enough bandwith you will only see a squarewave if
you use a homemade probe of 50 Ohm coax cable terminated at the scope with
50 Ohm from core to shield. Standard probes distort the waveform. Measure
before the 0.01µF coupling cap!
Alternatively you can adjust the pot for +0.5 to +0.6V at pin 3 of the
comparator. (best measured at the cap connected to the wiper of the pot)
The idea is to connect the KWAK-CLOCK to the raw digital supply of the
CD-player. The main filtercaps of the player and the 2.2mH chokes and the
2200µF caps form a PI-filter effectively filtering any noise going in AND
out the clock-circuit.
The instructions are very simple:
Remove/desolder the crystal from the player and also remove the two small
caps attached to it. Solder the crystal to the KWAK-CLOCK PCB. Connect
powerleads red to + 9-+16V , yellow to -9-16V and ground. Connect the output
of the KWAK-CLOCK to one of the pads of the original crystal.. Which pad can
be determined from the schematic or the type of Digital Signal Processor
your player is using or by trial with a 1k resistor in series with the
clockoutput. Keep the pad that works and remove the 1k resistor.
Installation of the KWAK-CLOCK is worthwhile in any CDP!
Best regards,
ELSO
Partslist KWAK-CLOCK-7 with low noise regulators
1 resistor 47 Ohm
1 resistor 1k
2 resistor 820 ohm
2 resistor 2.7 k
1 resistor 21.5 k
3 resistor 27k
1 resistor 100k
1 resistor 10M
1 pot 2k Spectrol type 64W
1 cap ceramic NPO� 39 pF (marked 39)
1 cap ceramic NPO 68 pF (marked 68)
2 cap ceramic disc 0.01 µF (marked 103)
8 cap ceramic 0.1 µF (marked 104)
1 cap ceramic NPO 100pF (marked 100)
2 electrolytic cap 2200µF; 16V
2 cap 1µF polypropylene
2 inductor 2.2 mH (marked NEOSID 2,2k)
1 FET J309
1 IC AD8561AN
1 transistor BC550C
1 transistor BC560C
2 IC LM431
3 ferrite bead
1 PCB
