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Gainclone or chipamp is a type of audio amplifier made by do-it-yourselfers, or individuals interested in DIY audio. It is a design based on high-power integrated circuits, particularly the National Semiconductor Overture series. The Gainclone is probably the most commonly built and well-known amplifier project amongst hobbyists.
Power op-amp with a maximal current output of 3 amperes [23] LM709 Yes General-purpose op-amp [24] LM741 LM709 General-purpose op-amp. [25] Widely used. LM747: Yes General-purpose dual op-amp. [26] LM748 General-purpose op-amp with external compensation [27] LM833 Dual high-speed audio operational amplifiers [28] LM837 Low-noise quadruple op ...
It was the main chip inside many gainclone amplifiers which are based on the Gaincard amplifier. [1] This part has become obsolete and an EOL notice has been issued for it. The functional equivalent IC, the LM3886, has two additional signals that must be addressed before it can be substituted, the mute function and a virtual gnd pin.
By 1978, BGW amplifiers were installed in greater numbers in discothèques than any other amplifier. Original BGW logo. Wachner co-wrote a paper for the Audio Engineering Society (AES) in 1975, addressing the problem of differing power claims in the amplifier industry and the hope that power rating standards set by the Federal Trade Commission ...
From 1960, Marshall owned a moderately successful music store in Hanwell, West London, selling drums and then branching out into guitars.His many guitar playing customers (including Ritchie Blackmore, Big Jim Sullivan and Pete Townshend) spoke of the need for a particular kind of amplifier, with Townshend wanting something "bigger and louder", and Marshall saw the opportunity, [2] [6] founding ...
The output amplifier was changed from a class A to a push-pull (class AB) design, based on the 1109 preamplifier, providing more output drive. The output transformer was changed to the B11148 type (already used in UREI LA-3A). Metering circuit now uses an op-amp. Revision G Not indicated 7053–7651