Roadster odd flanging effect on Ch.4 with loop on

[MG-Chris]

Hey folks,

I have a new Roadster (well, a few months old now, but I'm the first owner) and I'm having an odd problem with Channel 4. I run a GMajor/2 in the effects loop, and have it set to 100W/Diode/Bold. By itself (no loop) it sounds great, but when I click the loop on I get an oddball sort of flanging effect on it. I've tried three different processors (a TC Nova, a 2101 and the G2), and I've tried it with the processor itself on bypass, but no matter what's in the loop (and what setting it's on) the flanging effect is still there on Channel 4.

Has anyone ever experienced this? It lessens a bit if I jack the volume up, but even with the master at noon it's still noticably there, and only on Ch4, and only with the loop on.

I'm a complete tube newbie (this is my first tube amp) and I'm sure there's a better term for the effect, so my apologies in advance. Any insight would be much appreciated.

Cheers!

Edit: Should probably mention, it's a head, paired with a Recto 4x12.

 

[UnderJollyRoger]

Try what happens when you put your effect in front of the amp and turn the loop on (don't forget a cable between send and return).

 

[MG-Chris]

If I just patch a cable from send to return and click the loop on, there's no noise and all is well. With the effects in front of the amp altogether, there's no noise.

However with any effects unit at all in the loop, I get all sorts of really harsh channel coloring on Ch3 and Ch4. I'm using an Axe-Fx now, but the same thing happened with a GMajor, a TC Nova, a GSP2101, the AFX, and an old Quadraverb GT that I had laying around.

Any active effects at all in the loop seem to do it, and what's even more odd is that if I have the loop off, and click it off/on a few times I'll get different results and different levels of noise each time. I'm sure it's something simple, but it's driving me crazy.

 

[UnderJollyRoger]

Things behaving differently when you turn them on/off a few times sound like a bad connection, switch, relais, whatever ... if you're not into these things, best take it to a tech ...

 

[MG-Chris]

I got it sorted out actually, turns out that I wasn't matching the input/output signal levels between the head and the effects unit(s) correctly - the sound I was hearing was just an amplified version of the fizz that you get at low volumes with higher gain stuff.

Took a couple hours of fiddling before it finally dawned on me. Thanks for the help though!

 

[konstantine RK]

You got to cherish these moments.... I do!

 

[shatteredsquare]

I got it sorted out actually, turns out that I wasn't matching the input/output signal levels between the head and the effects unit(s) correctly - the sound I was hearing was just an amplified version of the fizz that you get at low volumes with higher gain stuff.

Took a couple hours of fiddling before it finally dawned on me. Thanks for the help though!

what was your fix? was it a tweak to the send level knob on the amp? I'm getting the same flange effect, only on channel 4.

 

[ironjose]

is it the fact that the ch4 has more gain than the others?

 

[shatteredsquare]

I'm using a PODxt Pro in the loop, I turned the FX send knob up to about 2:00, and then turned down the POD output... that fixed it. you just have to noodle with it and tweak the knobs till it sounds good.