59 In stock
MM/MC Phono Preamplifier
M7 Tube Phono Amplifier Kit PCB Turntables RIAA 12AX7 6x4 Tube-Rectifier Not Soldering No Including Tubes HIFI Audio DIY
Model No: WMM-MZ7(K)
This product is parts kit for audiophiles’ DIY. And it adopted tube rectifier, recommend to use tubes 12AX7 and 6X4, or 6N2 and 6Z4, HIFI level parts or componemts had been adopted in this kit. THIS KIT don’t include any tubes, and isn’t soldered.
If want to achieve the finished product, you need to fix other extra parts such as separated tubes, power transformer, connectors, chassis,.etc.
The shipping package includes the parts and components as below photo showed but they are not soldered (the photo only just reference).
Effect for tube fixed and soldering
1. PCB size: 120mm x 260mm
2. Requirements of secondary voltage of power transformer is:
a) AC 250 to 270v group x 1 , current is greater than 30mA;
b) AC12.6v x 1, current greater than 2A,
c) 6.3v group x 1 (rectifier as a tube)
3. Tube model requirements (THIS KIT don’t include any tubes)
a) 12AX7 x3pcs, plus rectifier tube 6X4 x 1pc;
b) or 6N2 x 3pcs, plus rectifier 6Z4 x 1 pc (both 6.3v filament)
Circuit Diagram of the tube phono stage amplifier
1. We provide you some items and components for your DIY. If you have enough capablities for circuit-reading, electronical components knowledge, assembling, soldering and problem-solving, you can buy them to enjoy DIY. If not, please don't buy them. We only provide limit technology support in this individial items itself.
2. If the kit had been soldered after sold, we don't accept the return.
3. If you buy the kit, it means that you shall accept the terms above.
Learn more about phono stage amplifier
Phono amplifier is designed for a phono signal amplification while using Turntables amplifier inside for special sound equalization circuit (RIAA) for restoring vinyl, it cannot be used for other purposes.
Method for checking noise sources
After phono player connected with the phono amplifier stage, if there is a significant low-frequency noise, you need to check in which part of the noise. First unplug the phono amplifier input signal cable to disconnect connection between them, if the low-frequency noise disappeared or significantly reduced, that may explain the noise from the phono player; obvious if the same or reduce low frequency noise , the noise it is very likely to put itself caused by phono amplifier.
It may cause a greater frequency noise that no specialized non-standard phono ground wire.
Generally, nonstandard phonograph is a turntable part of music center to cope with this set of sound designed, when external phono amplifier put to ground that could cause a large hum due to the different ground ways
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