Channel Switching HELLLP

[ampdoc1]

skyy,

I sent a couple of pms, but disregard them. I just looked "carefully" at the schematic and see what it is doing. You need two sets of switches, one to change channels, and one to select the master 1 or master 2 of either channel.
Do you want to implement both a set of front panel switches and a dual footswitch?
I can design it so that if the footswitch is plugged in, the front panel switches will be inactive. But this just takes more wiring, etc. I'd recommend doing what was suggested above,... parallel them. Just be sure and turn off both front panel switches when you want to use the footswitch.
Let me know what you want, and I'll send a diagram in a couple of days.

ampdoc

[skyyamps]

well... i would like to make the panel switch inactive if at all possible. you mentioned two switches above, i guess one for channel and one for master? could i wire this as one switch in anyway? if i chose the other option which would entail less wiring, i would need an on-off-on switch?

[ampdoc1]

Here's a little relay tutorial!

Relays are just switches (sometimes one, two, or four) which are turned on or off by a CONTROL voltage. The control voltage is what your front panel or footswitches turn on or off.

The relays shown on the Orange schematic (and used in most amplifiers) each feature two switches.

Since both switches on the relay are activated by the same control voltage, to allow them to run in opposition (that is, one switch turns something on while the other switch turns something off), each switch has three contacts.

COM- Common- this is the common pole for "routing" input or output signal;
NC - Normally Closed -This is the pole that is connected to the COM when there is no power to the relay coil;
NO - Normally Open - This is the pole that is connected to the COM when the relay coil is powered.

So, if you want one pole of the relay to turn on a function when you engage the relay coil, you would hook up your inputs and outputs to the COM and NO poles. With no voltage, the circuit is not made,... when voltage is applied the circuit conducts.
CLEAR SO FAR??

The relays in your amp do this very thing. The pair of relays right after the first preamp tube are hooked in opposition. When the relay is off, one channel's signal is diverted to ground through the 47R resistor, while the other is not. Changing the control voltage reverses this state.
On the output end, because of the switching in the front, only one channel is ever "on" at the output. Here, the relays are used to change the "ground" connection of the various Master pots. If the ground of the master pot is not connected, it has very little affect on the signal through it.

Let me know whether:

1) you want front panel switches or not;
2) if you DO want FPSs, do you want the additional footswitch disconnect for them; (I don't think this is worth the effort myself).


ampdoc


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[lastwinj]

run the negative end of the relays thru a switching jack to the front panel switches. when you are plugged in with a footswitch in the jack, the front panel controls wont work. when not plugged in the front panel works. simple.

germ

[Structo]

2) if you DO want FPSs, do you want the additional footswitch disconnect for them; (I don't think this is worth the effort myself).
ampdoc

Yes this is a non issue for me.
On my D'Lite, I just make sure the FPS are off, then the footswitch controls them.

[skyyamps]

first off, very helpful intro to relays!

ya... if you think the disconnecting of the FS would be too much then I'm definately up for the FP switch beign off with the footswitch to work! I'm really not picky, but I would like to keep it to one toggle switch on the FP.

thanks doc!

[ampdoc1]

I guess either I'm not making my self clear, or misunderstanding you. Tell me:

How many switches you want on the front panel, and what you want them to control

How many switches you want on a floorbox, and what you want them to control.

I'll lay it out.

[skyyamps]

one switch on the panel and and one on the footswitch both controlling channel. sorry i get a little confused myself

[ampdoc1]

Sorry again for the delay, but here is a drawing per your instructions. Only channel switching; switchable on the front panel or footswitch; LEDs on both switches.

ampdoc

[skyyamps]

two questions....
this is with one G5V-2 relay correct?
in the schem, there is a diode, a resistor, and a capacitor?

thanks in advance

[skyyamps]

wait a sec...

the red junk enclosed in the box is just the relay connections that are already taked care of for me?