VOX AMP CIRCUITS
Basic Vox Circuit - RASON
The first op amp is used to amplify the mike audio. The second op amp is used as a comparator which is designed to saturate a switching transistor during periods of moderate mike audio. Capacitor C2 which holds a small charge when the second op amp goes high, provides the necessary delay before unkeying the PTT. Variable resistor R6 sets the desired VOX level and should be adjusted for the particular
VOX Circuit – Circuit Wiring Diagrams
VOX is a switch ordered by voice, often used at microphones instead of the classic switch button. The vox described here may be connected to almost any type of audio equipment which has an external speaker for coupling. The threshold action is set with volume potentiometer of the audio amplifier which commands the VOX.
Vox Amp Schematics - wwwubestore
The VOX Showroom - Vox 730 Amp - A Look Under the Hood
The UL 700 Series amps, including the 730, were the first Vox amps produced in the UK that included a distortion effect, or "fuzz tone" as a feature. The 730 fuzz effect used two circuits to generate the effect. Vox used a pair of back to back OA200 diodes as "clippers" (see schematic at right).
Vox AC30 Silver Jubilee Circuit Analysis
"Few vintage tube amps have attained the gilded reverence heaped upon the Vox AC30. Certainly, the late 1950s Fender tweeds and Marshall's JTM45 and Plexi amps are equally lust-worthy in the eyes and ears of many players and collectors, but JMI's creation is often discussed with an added catch of the breath, an excited charge in the air.
Free Vox Diagrams, Schematics, Service Manuals
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