This is a kit,you need solder all parts by yourself,and don\\&39;t include the 4pcs biggest transisters and 2pcs biggest ENLA Caps.
pay me more 22USD for thie 4pcs transistors
pay me more 14USD for thie 2pcs ELNA CAPS
product description:
1.Size and M7 is exactly the same. Output to the famous Hitachi high-power
field tube 2SK1058.2SJ62, whichever tone round natural. Sweet lubrication. In
addition to the material than the M7 material is not small to strengthen, such
as nichicon MUSE top GB series BP -S22UF do coupling capacitors, ELNA_Sii.
Nichicon _KZ, etc. to do the back of the feedback and feedback. Relay using the
real product of the European dragon relay, rectifier with the ON of the 6A rectifier,
etc. and the M7 is exactly the same. Hitachi high-power field tube 2SK1058.2SJ62,
whichever sound round and natural. Sweet lubrication. In addition to the material
than the M7 material is not small to strengthen, such as nichicon MUSE top GB
series BP-S 2.2UF do coupling capacitors, ELNA_Sii. Nichicon _KZ The relay is
made of genuine Eurasian relay, rectifier with the ON of the 6A rectifier and so on.
2.Circuit features: FET on the tube for the differential amplification input
stage, inhibit the temperature drift, greatly improving the machine\\&39;s signal
noise. The Cascode circuit with constant current source load and linearity is
more flat than the conventional amplifier, which helps to reduce the nonlinear
distortion and the extended frequency band. The protection circuit is a safe
and reliable UPC1237 special speaker protection IC and joins 7812
regulator, the machine work more reliable.
.
3.debugging:
Welding good components, installed K1058.J62. Power on the transformer
connected to the primary 60W up and down the light bulb, the fine-tuning
resistor turn right down 5-6 laps down to reduce the open voltage.
Power on, adjust 202 (2K) fine-tuning resistor, so that the voltage on the 0.22
ohm up and down 5MV, and then adjust the 500 ohm trimmer resistor to
make the output point close to 0V can be.
Remove the bulb, re-adjust the 202 (2K) fine-tuning resistor, so that the voltage
on the 0.22 ohm up and down, and then fine down the middle point, debugging is completed.
Installation, D669 does not need to be installed on the heat, because K1058
is a negative temperature coefficient,
AC 36V 0 36V 200W