VCA Products
ST-VCA2 Mic/Line Voltage Controlled Amplifier
A single channel VCA with either mic or line input and line level output. The output
level is controlled by a 0-10V DC voltage or a 10k potentiometer. A local 10V supply is
provided or external control voltage may be used. A multi-turn preset and dual LED
indicator are included to set gain level. VCA attenuation 0 to 100dB.
Impedance: mic input 200 ohm balanced or 5k ohm unbalanced, line input 10k ohm
bridging balanced or unbalanced, output 150 ohm; Input level; mic, -40dBu to -
60dBu; line: -15dBu to +4Bu; frequency response: mic 50Hz-30kHz (+ or - 1dB), line
10Hz-20kHz (+ or - 0.25dB); headroom 18dBu; THD <0.025%. Supply: single 70mA.
ST-RG1 Ramp Generator
A ramp generator with 0-10 VDC output. Two control ports, “up” and “down” with tally
LED drives to show status. Normally open switches applied to the control ports ramp
the output up or down, leaving the output stable in the last set conditions when
released. When used in conjunction with RLC1 and ST-VCA1 a complete remote
volume control system can be put together. LED O/P current 3mA; Ramp O/P 0 to
10V nominal; Ramp time 5 sec max; supply: Single 40mA.