The standard 5 volt gate signals used by most modern gear including Eurorack systems and sequencers will not trigger a number of vintage synthesizers that require a higher gate voltage to trigger their envelopes - some early Roland synths including the System 100 (101,102), SH-5, some ARP, Oberheim and Sequential Circuits machines all need a higher gate voltage. The GA-1 Gate Amplifier will take a 5v gate signal and boost it to the supply voltage of your chosen DC power adapter - a 9v supply will give a gate voltage output of 9v, a 12v supply will give you a 12v gate etc. A multi voltage type DC power supply is ideal as you can adjust the output to suit your particular synth.
The GA-1 is a basic transistor amplifier circuit. A simple and inexpensive way to boost gate voltages without the need to modify valuable vintage synths. If you would like to build this circuit yourself I have provided the schematic on the tech page here.
Requires a DC power supply in the range 9-15v, NEGATIVE TIP (centre negative), 2.1mm plug. Due to the many different plug types and mains voltages around the world it is not economical for me to supply a DC adapter. These are easily sourced locally if you don't already have one in your studio. (I can supply a suitable psu for an additional fee if you have trouble finding one - contact me if required.)
Supplied with 6.35mm jack sockets as standard. Mini jacks (3.5mm) available on request.
Si vous achetez de l'extérieur de l'U.K s'il vous plaît n'oubliez pas de choisir "expédition internationale" lors de la caisse paypal