Currently Being ModeratedFeb 25, 2013 4:58 AM (in response to GTLazer)Re: Loud noise from HD500 FX Loop.
Two three things
First off, check your FX Loop is working ok by patching the FX Send to FX Return and turning the loop on. If you hear untainted signal then you are probably OK there.
Second thing ....
... some fuzz pedals are very sensitive to the impedance of upstream devices. They can have a very low input impedance and this can make them unstable. I am a little surprised if this is the case with the HD Loop but you might eliminate this possibility by placing another pedal (that you know normally works OK in front of the Fuzzbox) in the loop in front of the fuzzbox. If this fixes the problem then Impedance may well be the culprit.
Also, check your FX loop level switch is set to 'stomp' not 'line'. Wiggle it ... the switch is a little flaky at times.
Currently Being ModeratedFeb 25, 2013 2:53 PM (in response to jimsreynolds)Re: Loud noise from HD500 FX Loop.
I've tried 1 and 3. They behave as expected.
Number 2 is definitely a good idea; I've no other pedals in the house at the minute but I'll try it round my mate's house on Friday night and report back. It'll also give me a chance to properly test the power supply as well, which, as such, I'm just assuming is ok as it's brand new and has only been used to power the TGD.
Currently Being ModeratedFeb 25, 2013 10:39 AM (in response to GTLazer)Re: Loud noise from HD500 FX Loop.
The reason you hear the niose even if the loop is off could be the TRAILS setting.
If you have the TRAILS setting in the setup menu set to ON then the return of the loop is always enabled even if the loop is off. This is to allow trails for effects in the loop.
Currently Being ModeratedMar 4, 2013 1:07 AM (in response to GTLazer)Re: Loud noise from HD500 FX Loop.
First off, +1 to PaulJam. It is the active FX Return that is allowing the noise into the signal chain; makes sense when you think about it, but I've never been a great user of FX Loops before, so it had never occurred to me. I'm pretty sure it's something to do with the HD500 being buffered, but it's the same noise as if I roll my guitar volume off to zero, which has me slightly baffled as I just assumed the volume control is basically just a voltage attenuator.
Anyway, another +1 to jimsreynolds. I tried the TGD behind various pedals at my mate's house with varying results, so it's definitely quite sensitive. Whether it should be or not is still open to debate, as I had some problems with my mate's dead cheap PSU, whereas it was much better behaved with my new PSU, so I'm thinking I might need to test the power filtering cap.
Having said that, the TGD was very noisy through my mate's little Peavey Royal 8; I couldn't get any kind of usably quiet operation. Could be a whole host of things as his living room is ram-packed with all sorts of electrical gear (lots of scope for interference).
So yeah, when I've got a bit of time I'll probably end up taking the TGD to bits again anyway. Either that or I might get a separate set of components and do a build on solderless breadboard so I can A/B between them and see what happens.
Gonna have to build an A/B switch as well. lol