relay switch

[hotbaby]

hello,

can i use normal relay switches that switch back on a specify position if they are powered off?
The idea is to bypass the machine if it is switched off. i would feed it the relays with 12v or 24v if the machine is on so that the relay
is switched to a fix position when it is powered on... if it is unpowered the relay should switch back and bypass the wires... so that you do not need a bypass switch anymore.
if the machine is unused you can power it off... would be great for the ssl comp i have.

another idea i had to bypass the machines after the individual "coming-from-output" that the signal does not need to go unless to the machine and back.
This should work fine like a extern bypass with switches wired to the desc (controller). Anyone who has realize a similar thing?

PS: of course not for tube stuff that could be damaged if you just need bypass for comparing the audiosignal.

what do you think about the power off bypass?

 

[Samuel Groner]

I think it is quite common practice to configure bypass relays to switch into bypass when power is off.

Of course not for tube stuff that could be damaged.

I do not see any reason why tubes should get damaged by such an arrangement..?

Samuel

 

[radiance]

can i use normal relay switches that switch back on a specify position if they are powered off?

yes

The idea is to bypass the machine if it is switched off. i would feed it the relays with 12v or 24v if the machine is on so that the relay
is switched to a fix position when it is powered on... if it is unpowered the relay should switch back and bypass the wires... so that you do not need a bypass switch anymore.

Why would you not need a bypass switch?

To do a so called "hard bypass" with relays has the advantage that when in bypass mode, the signal does go straight from the input to the output without going through any circuitry. Also, when the unit is powered off the signal can still pass.

 

[hotbaby]

// why would you not need a bypass switch

the problem is that my gssl has no bypass switch and i am to lazy for buying and installing a new custom front plate with drilled and labeled hole for the switch..
that was my thinking of buidling a bypass switch with the on off power switch that the unit hard bypasses if it is powered off...
so it should hard bypass if theres no power and if the power is on the relays should switch to the circuit.

 

[Samuel Groner]

That's absolutely no problem, go for it! The only thing you need to observe is which contact of the relays is normally (i.e. without power) closed (NC)--see datasheet or just measure one.

Samuel

 

[Harpo]

// why would you not need a bypass switch

the problem is that my gssl has no bypass switch and i am to lazy for buying and installing a new custom front plate with drilled and labeled hole for the switch..

Just curious, are we talking about a different box here? Whats wrong with the labled, already fitted, but not wired switch next to power on/off?
If you used this switch for activating a 'turbo' pcb, a bypass switch without additional drilling could be implemented by a push/pull pot.

 

[hotbaby]

thank you guys,
samuel that was exactly what i wanted to do
I am a big t-racks software fan and the machines there just have one on/off as bypass... that was my thinking about trying something similar...
but i think i will find myself switching off the machine for comparing the sound that would not be good i think... but maybe not wrong to use a machine just if you think theres a need for without comparing bypassing and becoming crazy...

Harpo the push/pull pot idea is great. I had not thought about such a great solution...

why not installing both  i could save a little energy with the bypass in off-mode if the unit is not used....

have a good night