Stand by and power in one switch

[Tdale]

I have a switch that has 3 positions:

Position 1 : OFF
Position 2 : Common 1 and Lug 1 connect
Position 3 : Common 1 and Lug 1 still connect + Common 2 and Lug 2 connect


I'm planning to use this as a power/standby switch, kind of two - in -one. But in order to use it, I can't run both AC mains wires to the switch, so that when switched off, both AC wires are disconnected from the rectifier diodes. Using this switch, only one AC main wire is disconnected.

Is it ok to do it this way? I guess it is, since the switch is sold for this purpouse.

http://westlabs.com/Switches.HTML

The DPTTP switch...

Tommy

[sliberty]

Univox used a DPDT center off switch for the combined functions. In one position, the AC was connected to the PT primary, but the secondary center tap was disconnected from ground (thus, the amp was in standby). In the other position, both the AC and the secondary center tap were connected to their respective mates, thus the amp was in the playing position. The center position was off, with bth parts disconnected. It worked fine, although I was always a little uncomfortable with the fact that when switching from standby to on, you went through the off position.

The switch you have seems to have improved on this by moving the off position out of the middle. It should be fine.

[David Root]

I've used this switch before and am using it again in my current amp design. David Allen also sells it www.allenamps.com

It's a heavy duty switch and I have had no problems with it at all. Highly recommended for retrofits/small chassis with limited backplate space where fitting two switches is not possible. I think they are made by Carling but I'm not certain of that.