LM3886, LM3875, LM1875 - these chip amplifiers are no strangers to audiophile worldwide.
We offer point-to-point wired chip amplifiers. Point-to-point wired amplifier are so much better than those on a PCB.
Email us for more details, options and pricing. They can be in module form, or fully built in a aluminum chassis.
Sample pictures are as follow:
Soft Start Module for transformers
High power transformers, such as those >600VA, would have high turn-on surge. When coupled with huge capacitor banks, the turn-on surge will be very high, and may possibly damage the transformers, blow fuses, and damage the sensitive circuits connected to the system.
This is where soft start module for transformers come in - to reduce the initial turn-on inrush current to a safe level before letting the full power kicks in.
* soft starting, 3 seconds delay
* soft shutting down, 2 seconds delay
* OMRON 16A high current relays are used
* good for 2 x 1000VA power transformers
* fully encased power transformers
* universal input voltages, can be configured to 110-120Vac or 220-240Vac
* uses Alpha solder
* Uses 6pc of high power NTC 47D-20 thermistor
* Board size: 119mm x 80mm (2mm thickness, 70um thick copper trace)
15A version, USD$30 each (minimum purchase 2)
* lead time 2 weeks
Ultra fast recovery bridge rectifier modules
* Uses either MU860 (8A 600V), or MU1560 (15A 600V), or RHRP3060 (30A 600V)
* Note - heat sink is required if used in high power applications
Each module uses 4pc of the above diodes
8A version, USD$20 each (minimum purchase 2)
15A version, USD$23 each (minimum purchase 2)
30A version, USD$25 each (minimum purchase 2)
* lead time 2 weeks
Front
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| Back |
There's a lot of noise in the mains line. It will cause the power transformers to vibrate, hum and reduces the efficiency of the power transformers. The solution --> install a DC blocker module to remove DC pollution from the mains.
500W version DC blocker module (1000W max, recommend to parallel 2pc if need more power)
Application:
* Connect DC blocker module in series with Live OR Neutral line.
USD$25 each (minimum purchase 2)
* lead time 2 weeks
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| 500W |
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| 500W |
1250W version DC blocker module (2500W max, recommend to parallel 2pc if need more power)
* 25A bridge x 6pc
* 3300UF caps x 12pc
* Size: 7.5mm x 6mm (6.7mm x 5.2mm screw holes position)
Application:
* Connect DC blocker module in series with Live OR Neutral line.
USD$30 each (minimum purchase 2)
* lead time 2 weeks
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| 1250W |
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| 1250W |
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| 1250W |
4/7/2021
There are 3 methods of filtering EMI/RFI.
1. Bypass between Live and Neutral lines with X or X2 capacitors. It reduces common mode noises. Capacitance range 0.01UF to 0.47UF.
2. Bypass Live and Neutral lines to ground with Y or Y2 capacitors. It reduces differential mode noise. Capacitance range is 2200PF to 0.1UF. In order to reduce leakage current, the capacitance should not be more than 0.1UF (we chose 3300PF).
3. Common mode cancellation - using CMC choke. CMC choke would need thick gauge wires for high current handling, and adequate inductance is required to improve low frequency response. We use 10mH.
The module has 2 components:
1. DC filter or DC blocker
2. Integrated 2-stage EMI/RFI filter.
High current and shortest path design - improve current handing and reduces external interference.
Note: different current rating choke will look different.
5A version, USD$20 each (minimum purchase 2)
15A version, USD$30 each (minimum purchase 2)
* lead time 2 weeks
