MATRIXSYNTH: Latest TTSH build (Arp 2600 clone)

Sunday, November 08, 2020

Latest TTSH build (Arp 2600 clone)

Todd Murray

"This is from the latest V4 TTSH PCBs from Synthcube. There have been many mods done to this as well, including waveshapers, gatebooster, VCO sync, etc. Although most of the voltage control still uses the LM301, many are selected for the lowest input offset voltage as possible. Additionally the entire audio path uses OPAMPs that are closer to the original MC1439s in either fast slew rate or lowest input offset voltage where needed. VCOs, VCA and VCFs make heavy use of matched (Vbe) transistor (NPN/NPN or PNP/PNP) pairs, matched JFETs and NPN/PNP pairs selected for identical and optimal Hfe."

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