G50 Tbp12 Noise And Decline In Signal
Posted 24 May 2013 - 05:51 PM
Posted 24 May 2013 - 10:52 PM
When you say "I have tried 3 different cables and all of them do it", I'm guessing that you're talking about cables from the G50 receiver to your amplifier.
That "laying on of hands healing" (capacitive) effect around your beltpack, however, would indeed seem to verify the existence of something very similar to "a ground problem", but a different one.
One that's probably related to the lack of a solid shield (outer braid) connection between your instrument itself and the TBP12's input socket.
Correct re-termination, or (even better) replacement of your guitar jack plug to TA4F adapter cable is probably all that's needed to effect a "cure".
Given the hard life that a "jobbing musician's" cables endure, I'd always recommend spending a few extra bucks for high-quality cables such as these...
...but these cheaper versions will also do the job:
Posted 25 May 2013 - 02:58 AM
Posted 25 May 2013 - 05:14 AM
(Please forgive my earlier incorrect assumption that it was the G50 receiver's output cable that you originally had in mind, but I'm sure you understand my difficulty in visualising your situation from this distance.)
As you also say, it's almost out of the question for you to have three adapter cables that are all missing their connections to pin 1 of their TA4F connectors, so I now suspect that pin 1 of your TBP12's TA4M connector may no longer be connected to the transmitter's internal electronics.
You may have been unlucky, in that I've seen instances where physical leverage or flexing movement of the connected plug has occasionally created enough "lever" movement to fracture the internal metal path from the rear of the TA4M connector to the transmitter's circuit board.
This has mostly (but not always) been preceded by accidental loosening of the nut that fastens the input connector's "mouth opening" to the transmitter housing.
Sadly, it looks like a trip to the workshop is required, ...either by dropping the beltpack in to your nearest Line 6 representative, or by following Line 6's repair procedures via the "Support" link at the bottom of this page.
Posted 25 May 2013 - 10:52 AM
Did it once work with this guitar and now it has changed? What is your guitar? Passive or active output? Have you tried another guitar and found the same results? Any chance you can try a different transmitter with the same setup and see if the problem persists?
When you use wireless you end up with no ground reference at your guitar and when you use a cable you again have a ground reference.
Posted 25 May 2013 - 01:53 PM
Are we (williambean & RonM) both somehow wrong in thinking that the guitar in question must be OK, based on its ongoing trouble-free operation into the POD HD500's input ?
The total irrelevance of any actual "ground reference", ...but the ongoing vital relevance of shielding... to a fully floating, battery-powered, wireless beltpack, is what I was trying to indicate when I used the following terms to describe what I think may be the root cause:
"...the shield not being connected from the instrument's output to the so-called "ground" (or, more accurately, signal "cold") of the audio input to your TBP12 belt-pack."
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