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Click to see how
to adjust
 Uses:
It’s a 2MM thick double-sided holed board with 2-ounce copper foil.
All transistor circuit is applied to eliminate the IC tone
coloration. Temperature compensation is used to improve stability.
There’s an adjustable constant current source on the input side. AC
resistance is extra high while DC resistance is low, so that the
remaining noise of power supply is eliminated effectively. The two
stabilized voltage supplies (positive and negative each or two
positive voltage) on the board are completely separated, which can
be used dependently or combined. This board can be applied to CD
players, decoders, preamplifiers and power amplifiers modification
(positive and negative channels or two positive voltages). It has
been widely used and recognized by most customers.
The 2008 edition maintains
the high-stability and high-output voltage features of the 2007
edition, and it uses stable constant current source to support
power load. This makes the sound more crystal clear, and also
improves bass volume and control. Moreover, input current adjustable
function is added. Users can adjust the input current value to tune
the tone color for a better modification effect. The circuit is more
convenient for DIY. With general value, the voltage can be adjusted
in a considerable range.
Improvement on the
2007 edition:The imrovement is 2008
edition had two source of regulator, between transistors and LED,
they have different sounds sense, user can choice one of them easy
and get a different soud. More fun on it!
Size
of the printed board: 65*95mm
Price of each production
board: USD 26.80
We can make by your order , send E-mail to us and tell us what you
want to do , we can give the best advice to you. 2008 edition can
make double V+ output or double V- output or V± output. Output
voltage ±3 to ±50V by order.
Before you put on power, you must install those four C5171 and A1930
to hit sinks or the class of your gear shell.
Personal experience: Stabilized voltage setting input current value
is 1.3-2 times of the load current value. It mean adjust the extra
current is 30% to 100% of load current,you can test the voltage of
extra current monitor resistor (4 ohms) , adjust current adjust
resistor , let voltage of 4 ohms had 100MV/200MV/300MV/400MV ,
listen the different of sound, find which value is best .
How to choice the source of regulator?
We made standard is use transistors regulator source , if you
want to change to use LED trgulator source, The best way of first
times is shut down power, and solder off the output wire ,cut J2 and
J4 ,then short J1 and J3 each. Put on power and adjust the output
voltage to satandard . Shut down power and connect output wire .
If you have change source of regulator ago, you can do it quite
easy. 1, Adjust output voltage to 90% , (for exsample, standard is
±15V, you can adjust to ±13.5V) . 2,cut J2 and J4 ,then short J1 and
J3 each. Put on power and adjust the output voltage to satandard .
If have any problems
,welcome send E-mail to
audio-gd@126.com , we will reply you soon and professional. |
