This Modification helps to syncronize the first step1 to an external source.
when you try to sync from an external source the step2 is in sync with step1 from external.
This Mod fix this issue, for original 1601 and clones
assembled PCB with 2 ICs.
the CD4520 has to be used from your 1601 - and drop this pcb in this place.
- BOM and buildguide is available on my website DSL-man.de
https://www.dsl-man.de/display/TTSHADDONS/Arp1601+Step1fix+Mod
