[sdiy] Rotary Switch Needed

[john mahoney]

Doh! Thanks, Don. Jeff already mailed me an obviously correct wiring
diagram.
--
john <---(humbled once again :-)


----- Original Message ----- 
From: "Don Tillman" <don at till.com>
To: "john mahoney" <jmahoney at gate.net>
Cc: <synth-diy at dropmix.xs4all.nl>
Sent: Friday, December 19, 2003 2:49 PM
Subject: Re: [sdiy] Rotary Switch Needed


>    > From: "john mahoney" <jmahoney at gate.net>
>    > Date: Fri, 19 Dec 2003 14:13:12 -0500
>    >
>    > I don't think this can be done with a DPDT switch.
>
> Oh sure it can...
>
>    > Series wiring requires a link from one speaker's negative
>    > terminal to the other speaker's positive terminal, but this can
>    > not be hardwired because it must NOT be present when running in
>    > parallel mode. You can't wire that link into a DP switch.
>
> You just have to be more creative.  Here's one way:
>
>  pos input to speaker1-pos and to switch1-parallel
>  neg input to speaker2-neg and to switch2-wiper
>  speaker1-neg to switch1-series and to switch2-parallel
>  speaker2-pos to switch1-wiper
>  switch2-series is left unconnected
>
>   -- Don