These are very nice quality boards with short and thick traces.
Photograph 2 shows the LM3886 amplifier PCB and power supply PCB from. This leaves you with sourcing the remaining parts, power transformer and enclosure. OK, so now you are interested in building a Gainclone chip amplifier for yourself and you are wondering where the heck should you start? You can start at where you can purchase printed circuit boards (PCB) and part kits for LM1875 (20W) and LM3886 (68W) amplifiers. In this DIY Audio Project I run through a build of a LM3886 gainclone amplifier for myself to show how simple it can be to build these amplifiers and to hear the gainclone sound for myself. Fast forward a number of years and now the Gainclone is probably the most commonly built and well-known DIY amplifier project amongst audio hobbyists. The controversy ensued after a number of positive magazine reviews of the Gaincard amplifier. The Gaincard amplifier raised a number of eyebrows in the audiophile community when it was discovered that the Gaincard amplifier cost less than $100 US in parts, but sold for $3300 US with its small power supply. The Gaincard amplifier with its unconventional design that had far fewer parts, less capacitance and simpler construction than similar power Hi-Fi amplifiers.
The Model 4706 Gaincard amplifier was introduced in 1999 by 47 Laboratory.
Photograph 1: 47 Laboratory Model 4706 Gaincard and Power Humpty Despite the high retail cost of the Gaincard, you should easily be able to build a great sounding gainclone amplifier yourself for about $200 to $300 US. Photograph 1 below shows a 47 Laboratory Model 4706 Gaincard which retails for about $3300 US. However as time has gone on, to many Gainclone amplifier is now generally understood to mean: any low component amplifier based around high power IC and intended for high performance audio. 50 Watts output power (25 Watts per channel).Voltage regulation with a 170 VA cut-core transformer.PSU filter with 1000♟ to 2200♟ capacitors.9 parts per channel based around the LM3875 IC.The 47 Laboratory Model 4706 Gaincard amplifier has these features: The simple Gaincard amplifier is based around the National Semiconductor (now Texas Instruments) LM3875 integrated circuit (IC). So what the heck is a Gainclone amplifier? Originally, the term Gainclone amplifier was generally understood to be a clone of the 47 Laboratory Gaincard amplifier. 4706 Gaincard Amplifier and Gainclone Amplifiers
0 kommentar(er)
