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Hi end 1969 class A AMP of 4pcs MJ15025 2pcs MJ15024 HD1969 power amplifier DIY kits Completed board with heat sink
Hi end 1969 class A AMP of 4pcs MJ15025 2pcs MJ15024 HD1969 power amplifier DIY kits Completed board with heat sink
Hi end 1969 class A AMP of 4pcs MJ15025 2pcs MJ15024 HD1969 power amplifier DIY kits Completed board with heat sink
Hi end 1969 class A AMP of 4pcs MJ15025 2pcs MJ15024 HD1969 power amplifier DIY kits Completed board with heat sink
Hi end 1969 class A AMP of 4pcs MJ15025 2pcs MJ15024 HD1969 power amplifier DIY kits Completed board with heat sink
Hi end 1969 class A AMP of 4pcs MJ15025 2pcs MJ15024 HD1969 power amplifier DIY kits Completed board with heat sink
Hi end 1969 class A AMP of 4pcs MJ15025 2pcs MJ15024 HD1969 power amplifier DIY kits Completed board with heat sink
Hi end 1969 class A AMP of 4pcs MJ15025 2pcs MJ15024 HD1969 power amplifier DIY kits Completed board with heat sink
Hi end 1969 class A AMP of 4pcs MJ15025 2pcs MJ15024 HD1969 power amplifier DIY kits Completed board with heat sink
Hi end 1969 class A AMP of 4pcs MJ15025 2pcs MJ15024 HD1969 power amplifier DIY kits Completed board with heat sink
Hi end 1969 class A AMP of 4pcs MJ15025 2pcs MJ15024 HD1969 power amplifier DIY kits Completed board with heat sink
Hi end 1969 class A AMP of 4pcs MJ15025 2pcs MJ15024 HD1969 power amplifier DIY kits Completed board with heat sink

Hi end 1969 class A AMP of 4pcs MJ15025 2pcs MJ15024 HD1969 power amplifier DIY kits Completed board with heat sink

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Note:This is a kit. You need to weld by yourself

Finished product : Click the picture to enter

HD1969 the original machine is the 6 pipe structure, why should make the 6 tube instead of the 4???

By 6 scheme, two tube electronic buffer filter can avoid switch machine when pupu impact horn sound. The speaker is very good protection, tube 4 board, boot is absolutely flapping sound impact long-term use damage the speaker.

by 4 tube HD1969, under normal circumstances, each channel minimum 30000UF capacitance that can be managed to ensure that no noise, because the AC ripple is very large, six tubes version, as long as the above 4700UF capacitor filter can do very quiet, details, level, background better, such as electronic filtering Darlington magnification of 1000, the base is connected with the 220U capacitor and filtering effect quite in 22 million micro hair filter effect (220X1000) and therefore pipe 6 Effect and cost more than four pipe more.

PCB SIZE 139MMX73MM 2N3055 is disassemble the tube
Use and test:
Transformer voltage range: AC12V to AC28V 2 line if the DC input, you can take 18 to 36V
quiescent current measurement :
The test current is 1A, the power supply voltage is low, it can be adjusted to 1.2A
Variable resistance regulated by 1K ohm

Measuring output midpoint :

Variable resistance regulated by 100K ohm

Power transistor installation note :


Purchase transformer connection :


Brand Name:
NoEnName_Null
Certification:
NONE
Origin:
CN(Origin)
Maximum Power Per Channel:
10W
Model Number:
1969
Package:
Yes
Channels:
2 (2.0)
Type:
Home Amplifier

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