ARP 2600 Shots and Mods

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MODIFICATIONS:

"I had this modified by John Leimseider, Electronics Technician at the Cantos Music Foundation in Calgary. JL has had over 20 years experience with Arps and can be Googled

This one has had TL071 op amps installed to replace the old ones which reduced the noise and improved fidelity. This also reduced the DC offset which is like the background voltage which the audio signal rides on. The offset doesnt actually contribute to the wanted signal its just like static so reducing it is a good thing.

The Arp envelopes are known for having inconvenient lengths so I had switches installed that allow you to double the attack, decay and release times.

The power supply was replaced to allow both 240/115V operation, its currently set to 115V but can be changed by disconnecting one wire and soldering another, about 15mins work.

Also added was AC coupling which involved adding capacitors to the circuit again to reduce the the static (DC) components from the input signal to the amplifier.

Finally, John installed an external input for the electronic switch which lets you control the switch from something other than the clock for the sample and hold. This is great because 'you can plug in 2 oscillators to the inputs of the switch and then control it from the square out of an oscillator. When you do this with synched oscillators, you get some amazing new timbres'."