A while back I learned on this forum that the Normal channel and the Reverb channel were "out of phase" with each other due to the reverb tube. This meant that if you ran stereo effects into the two separate channels, you would encounter "phase cancelling" when you turned both volumes up, which caused a major loss of volume and tone.
My question:
If the Normal channel is wired into the reverb circuit (so the reverb works on both channels) are both channels "in phase" with each other?
Thanks in advance for the info.
-pete
Twin Reverb "phase" question:
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Pete Burak
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Donny Hinson
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That's true...there is a phase change in the channels. However, one channel doesn't "cancel out" the other completely. The most cancellation is experienced when the volumes on both channels are set identically. As long as there is a difference in the two volumes, what will actually take place is a a reinforcement, or a slight reduction of one signal or the other.
Oh yes, to answer your ending question...that depends on HOW the channels are wired together. This connection can be done at several points, and THAT is the determining factor as to whether or not you will have the "out of phase" situation"
Try this experiment...
Plug your steel into the reverb channel, and then plug another wire into the remaining jack (in the reverb channel) and plug the other end into the normal channel. Now, you will notice that as you turn up the volumes, there is a tone change (out of phase sound) when they are set identically, but it disappears when either channel is set differently.
Go ahead...try it, you don't have anything to lose! Actually, when I was looking for "new and different" sounds (before all these neat effects were popular) I wired another jack on my volume pedal, and then used both channels in this fashion...and presto! An ersatz phase shifter!!!
You may not like the "criticality" of the tone and volume controls when doing this, but it certainly is usable! And who knows...you might find something you like!<FONT SIZE=1 COLOR="#8e236b"><p align=CENTER>[This message was edited by Donny Hinson on 31 May 2001 at 03:29 PM.]</p></FONT>
Oh yes, to answer your ending question...that depends on HOW the channels are wired together. This connection can be done at several points, and THAT is the determining factor as to whether or not you will have the "out of phase" situation"
Try this experiment...
Plug your steel into the reverb channel, and then plug another wire into the remaining jack (in the reverb channel) and plug the other end into the normal channel. Now, you will notice that as you turn up the volumes, there is a tone change (out of phase sound) when they are set identically, but it disappears when either channel is set differently.
Go ahead...try it, you don't have anything to lose! Actually, when I was looking for "new and different" sounds (before all these neat effects were popular) I wired another jack on my volume pedal, and then used both channels in this fashion...and presto! An ersatz phase shifter!!!
You may not like the "criticality" of the tone and volume controls when doing this, but it certainly is usable! And who knows...you might find something you like!<FONT SIZE=1 COLOR="#8e236b"><p align=CENTER>[This message was edited by Donny Hinson on 31 May 2001 at 03:29 PM.]</p></FONT>