What kind of musical instruments are there?

By the early 1940s, he had partnered with another local electronics enthusiast named Clayton Orr (Doc) Kauffman, and they formed a company named K & F Manufacturing Corp. to design, manufacture, and sell electric instruments and amplifiers. Production began in 1945 with Hawaiian lap steel guitars (incorporating a patented pickup) and amplifiers, which were sold as sets. By the end of the year, Fender had become convinced that manufacturing was more profitable than repair, and he decided to concentrate on that business. Kauffman remained unconvinced, however, and they had amicably parted ways by early 1946. At that point Leo renamed the company the Fender Electric Instrument Company. The service shop remained open until 1951, although Leo Fender did not personally supervise it after 1947. The first big series of amplifiers were built in 1948. These were known as tweed amps because they were covered in the same kind of cloth used for luggage at the time. These amps varied in output from 3 watts to 75 watts.