STK-0050,70+ replacement Modules(2), complete kit with all parts & instructions
New: In Kit formDesigned to replace the STK-0050 in the Pioneer SX-780 and other stereo receivers using the old Sanyo moduleThey have been successfully used in Fisher, Technics amp and receiversEliminates the probability of poor quality modulesDiscrete design allows for easy repair, improves reliability and performanceCan be used with many amplifier front-ends to make a complete amp. You need special tools such as a soldering iron, DC voltmeter, side cutters, needle nose pliers, screw drivers etc.Prior Audio Electronic knowledge and interpretation is helpful. There is help at Audiokarma Will ship these complete kits International Note: All Electronic Components are supplied Listing is for two blank PCB's, heatsinks, all parts, wire, documents, assembly instructions for two modules Heatsink is tapped for M3 x 0.5 screws, suppliedFree support and no returns.The module will improve the amplifier's reliability and operational specifications for stereo's using STK modules, up to 85 watts.Outputs transistors are specified as Onsemi 200W devices. There is another listing/item available, using the lower power 150W Toshiba devices, which is offered at a reduced priceOutput transistor bias adjustment is included in circuit design. This allows for the modules to be adjustable for matched performance Expected Performance:Total Harmonic Distortion:~0.02% ( 20-20KHz,4-8 ohm, 31mA bias) Gain (based on Pioneer SX-780 design) = 15.5 (23.8 dB)Bias: Each emitter resistor in the SX-780 are 0.22ohm, that would be 0.22 *0.031A =7mV across each emitter R or 14mV across the two of them.Increasing the bias current will make the output transistors to run hotter. This lowers the crossover distortion and allows for a larger class "A" operating region. Reference:Google: "STK-0050 Replacement for SX-780 and others" @ Audiokarma web site for additional details on our design
Specifications
| Returns Accepted | ReturnsNotAccepted |
| Brand | Custom Design |
| Model | STK-0050-A3 |
| MPN | STK-0050-A3 |
| Country/Region Of Manufacture | Canada |
New: In Kit formDesigned to replace the STK-0050 in the Pioneer SX-780 and other stereo receivers using the old Sanyo moduleThey have been successfully used in Fisher, Technics amp and receiversEliminates the probability of poor quality modulesDiscrete design allows for easy repair, improves reliability and performanceCan be used with many amplifier front-ends to make a complete amp. You need special tools such as a soldering iron, DC voltmeter, side cutters, needle nose pliers, screw drivers etc.Prior Audio Electronic knowledge and interpretation is helpful. There is help at Audiokarma Will ship these complete kits International Note: All Electronic Components are supplied Listing is for two blank PCB’s, heatsinks, all parts, wire, documents, assembly instructions for two modules Heatsink is tapped for M3 x 0.5 screws, suppliedFree support and no returns.The module will improve the amplifier’s reliability and operational specifications for stereo’s using STK modules, up to 85 watts.Outputs transistors are specified as Onsemi 200W devices. There is another listing/item available, using the lower power 150W Toshiba devices, which is offered at a reduced priceOutput transistor bias adjustment is included in circuit design. This allows for the modules to be adjustable for matched performance Expected Performance:Total Harmonic Distortion:~0.02% ( 20-20KHz,4-8 ohm, 31mA bias) Gain (based on Pioneer SX-780 design) = 15.5 (23.8 dB)Bias: Each emitter resistor in the SX-780 are 0.22ohm, that would be 0.22 *0.031A =7mV across each emitter R or 14mV across the two of them.Increasing the bias current will make the output transistors to run hotter. This lowers the crossover distortion and allows for a larger class “A” operating region. Reference:Google: “STK-0050 Replacement for SX-780 and others” @ Audiokarma web site for additional details on our design
