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from Muffwiggler thanks to all supporters specially "Altitude" and "sduck"
pcb order from Oshaprk: https://www.diysynth.de/product_info.php?info=p28_ttsh-vco-sync-pcb.html
i prefer Sync: for syncing VCO 3 to VCO2 and VCO1 jumper (set a bridge) JP2, V1 = out from VCO3(61k9 resistor), S1 to VCO1 sync input, S2 to VCO2 sync input (at input = 1k5 resistor)
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| Warning |
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its very important to use shielded cable for VCO I/O connections to the sub vco boards (dont forget to ground the shield ob both sides) for About the wiring to switches dont drill , do not twist the cables, otherwise you get softsync issues. dont drill don‘t twist the cables for the switches ! or you get some soft sync. its a difficult MOD and there´re few risk to destroy your rare trannys of the VCO Cores (2N4125, 2n5459, CA3046) if you do it wrong. |
Optimized Version from me:
for all users who got my TTSH SYNC PCB, only use the resistor values as shown (the VCO SYNC Version2 PCB use a different PCB designator layout)
| BOM |
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6x 100k resistors 4x 150k 2x 2N3904 2x 2N5459 2x 100nf X7R bypass cap MLCC 2x 10uf electrolyt cap 3 x MTA100 power header and jack 3 pin 2x 2pin mta or 1x 4 pin mta header/jack spacers, screws, nuts shielded cables RG174 cables for power, switch 2x switches (UM 3pole) |
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