In a true bypass Echobase, can I leave the CD4066 off the PCB?

[Nitefly182]

Im using this echobase layout:


Im building two echobases in one box and both will be true bypass so I left the CD4066s off the boards. It just occured to me that they might be needed for something even if I dont use the electronic switching scheme. I dont normally use any sort of electronic switching so I just dont know if the IC needs to be there even if its not doing the actual switching.

[Nitefly182]

OK just read the Echobase thread again and I see that the CD4066 does some of the routing to the PT2399 so it seems like its neccessary to some extent.

[mth5044]

There is a way to true bypass the echo base somewhere in that thread, atleast I think I saw it. You might be able to figure it out from that.

Hopefully someone knows where it is.

[Nitefly182]

There is a way to true bypass the echo base somewhere in that thread, atleast I think I saw it. You might be able to figure it out from that.

Hopefully someone knows where it is.

You can run the in and out of the PCB like any effect to a true bypass scheme with a 3pdt and it will work fine. I ended up doing that with my first one. I just didn't realize that the 4066 was still doing work even if it wasn't doing the bypass switching.

[slacker]

The easy way to true bypass it is to build it stock and just leave off the boss/tails switch, that sets the CD4066 switching to the on position, then just hook up your 3PDT as normal. If you connect the wiring that would normally go to the bypass switch to the spare poles of the 3PDT then that will turn the LED on and off, or you just just add your own in the normal way.

If you just leave out the CD4066 then there will be no signal getting to and from the PT2399. You need to do the following, mods to make it work, all the pins mentioned are from the schematic you'll need to check that the PCB uses the same pins of the CD4066.

If you've already built it with all the components in place apart from the CD4066 then just Jumper the PCB pads for the following pins of the CD4066 pin 1 to pin 2 and pin 10 to pin 11. You'll have a bunch of unnecessary components doing this but it will work fine.

If you want to remove everything you don't need then do this.
Remove the 2N5089 and any of the components connected to it.
Don't install the 220K and 1M5 resistors connected to pins 1,2,10,11,12 and 13 of the CD4066.
Don't install any of the components connected to pins 6,8 and 9 of the CD4066.
Jumper the PCB pads for the following pins of CD4066 pin 1 to pin 2 and pin 10 to pin 11.
That should do it, if you want to save a couple more components you can replace the 47n cap connected to pin 1 of the CD4066 with a jumper and do the same with the 100n cap connected to pin 10, but that might change the tone a bit.

[Nitefly182]

The easy way to true bypass it is to build it stock and just leave off the boss/tails switch, that sets the CD4066 switching to the on position, then just hook up your 3PDT as normal. If you connect the wiring that would normally go to the bypass switch to the spare poles of the 3PDT then that will turn the LED on and off, or you just just add your own in the normal way.

If you just leave out the CD4066 then there will be no signal getting to and from the PT2399. You need to do the following, mods to make it work, all the pins mentioned are from the schematic you'll need to check that the PCB uses the same pins of the CD4066.

If you've already built it with all the components in place apart from the CD4066 then just Jumper the PCB pads for the following pins of the CD4066 pin 1 to pin 2 and pin 10 to pin 11. You'll have a bunch of unnecessary components doing this but it will work fine.

If you want to remove everything you don't need then do this.
Remove the 2N5089 and any of the components connected to it.
Don't install the 220K and 1M5 resistors connected to pins 1,2,10,11,12 and 13 of the CD4066.
Don't install any of the components connected to pins 6,8 and 9 of the CD4066.
Jumper the PCB pads for the following pins of CD4066 pin 1 to pin 2 and pin 10 to pin 11.
That should do it, if you want to save a couple more components you can replace the 47n cap connected to pin 1 of the CD4066 with a jumper and do the same with the 100n cap connected to pin 10, but that might change the tone a bit.

Thanks for the info. Im going to drop the 4066s in just for ease at this point but Im glad this information is now here in case someone else wants to builod without them.

[goamp]

Slacker has already given comprehensive info on this matter, but I just want to add that there is no way of getting the'Tails' option if you use true bypass.