| 摘要 |
Electronic bass register musical instrument tube preamplifier An in-line signal preamplification device which richens the tone of electronically amplified bass register musical Instruments The unit is connected in the signal path between the instrument and the amplifier by the use of a standard 2/4′input jack and a 4/4′output jack Other effects processors may be placed either before or after the preamplifier device There is one volume control and one overdrive switch, which utilizes a variable current source driving section to further reduce distortion and richen the bass register tone The variable current drives the plates of 4/2 of the UAX7 tube with a 48vdc plate voltage in the overdrive position and a 40vdc plate voltage in the normal position Use of the overdrive position causes a premature failure of the 32AX7 tube, so it should be used sparingly The EBIP Is useful for both solid state and tube amplifier applications.
|
