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| | |-+  ABY switch for DC 30, what about the "Y"?
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Author Topic: ABY switch for DC 30, what about the "Y"?  (Read 4556 times)
Ivan Durak
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« on: February 25, 2013, 08:33:58 AM »

Hi everybody.

I was wondering if it's possible to run both channels at the same time with a standard ABY switch. What does it sound like? Is the split signal too weak? Would it need an EP boost?
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wyatt
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« Reply #1 on: February 25, 2013, 10:01:52 AM »

The signal will be a little lower, but nothing that their gain stages shouldn't make up.

You may have a ground loop or phase issue, so you might consider an ABY with a ground lift and phase switch.
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Ivan Durak
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« Reply #2 on: February 26, 2013, 09:43:10 AM »

Thank you Wyatt. I'm looking into different ABY switches.
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bcmatt
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« Reply #3 on: March 11, 2013, 05:48:22 PM »

I remember using a simple home-made A/B/Y pedal with mine for a while, and it worked fine without any phase switching, or ground lift, isolation, etc.

I think I used it with fx in the loop of the EF86 channel and then used the ABY to switch between that and a dirtier top-boost channel, and then was able to blend them together and whatnot. Even though the EF86 is capable of much more gain, it also produces much louder cleans at low plate voltages (using VVR) than the top boost channel, so the top boost channel was much dirtier when the volume was matched. That's why it worked as a clean and dirty switch with the A/B switching.

Since the EF86 channel has so few gain stages, I find it drops volume quickly when using the guitar volume knob, compared to other amps that would clean up but retain volume better. I seem to remember that the top boost channel also retains volume better when backed off at the guitar (because of more gain stages), so when in Y mode, the fx (or lack there-of) on that channel would become more prominent when backing off the guitar volume.... lots of things to experiment with!
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Ivan Durak
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« Reply #4 on: March 18, 2013, 08:20:08 AM »

Thanks a lot for these pointers, bcmatt.

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elliptic
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« Reply #5 on: January 20, 2014, 03:28:54 PM »

You can do it by just running a patch cable from the second input of the channel you're plugged into into the top input of the ther channel.  It does change the sound slightly, but I'm not sure whether that's due to the load on the cable changing or having both channels running at the same time.

I'm looking for a buffered ab/y that lets you adjust the relative gain of each.
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Ash Telecaster
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« Reply #6 on: July 15, 2016, 02:03:35 PM »

Hi,

I see this is an old thread but I was just thinking about doing the same thing. I was intending on A/B-ing the channels but then thought about blending them. Has anybody tried this? How were the results?

Thanks!
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