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11-23-2018, 01:49 AM
Hi Vostre
I wouldn't use an ON-ON-ON switch as that is likely to be expensive or not exactly what is needed. The C&K 7211 can be wired as a 1P3T switch (like the T-U-Ps on my older amps), or as a A,A+B,B switch ala Gibson guitar pickup selector. It's a great quality switch, as are all the C&K 7000-series devices but it is very expensive.
I usually opt for a less expensive switch, such as a SPDT with centre-OFF (7103-SYZQE for panel mount and solder lugs). Depending on the circuit switching requirements, wiring the relay contacts in a specific fashion will give the 1-of-3 selection/muting as needed. More reliably, using a few BJTs to interface provides the distinct 3-way output needed. Instead of BJTs, one could use CMOS gates but you still end up needing BJTs to drive the relays. With any of these solid-state interfaces, it is a lot easier to build if it is on a PCB - even with just the relays a PCB makes things neater.
I wouldn't use an ON-ON-ON switch as that is likely to be expensive or not exactly what is needed. The C&K 7211 can be wired as a 1P3T switch (like the T-U-Ps on my older amps), or as a A,A+B,B switch ala Gibson guitar pickup selector. It's a great quality switch, as are all the C&K 7000-series devices but it is very expensive.
I usually opt for a less expensive switch, such as a SPDT with centre-OFF (7103-SYZQE for panel mount and solder lugs). Depending on the circuit switching requirements, wiring the relay contacts in a specific fashion will give the 1-of-3 selection/muting as needed. More reliably, using a few BJTs to interface provides the distinct 3-way output needed. Instead of BJTs, one could use CMOS gates but you still end up needing BJTs to drive the relays. With any of these solid-state interfaces, it is a lot easier to build if it is on a PCB - even with just the relays a PCB makes things neater.
