dedjazzgadgetz
New Member
Hi everybody !
Like many guitar enthusiasts, I've built myself a DIY electro-magnetic guitar sustainer (-oh, that's sooo 2009... ! )
It's a TDA7052a 1W amp/32AWG 14 ohm-ish flat 2mm coil-over-neck-pickup combo, which works surprisingly well (although I still had to "modify" bridge & neck pick-up poles to improve response, i.e. swapping the poles around so they would "follow" my Strat's neck radius hence, driver coil being that much closer driving the strings (high B & E in particular). The mod doesn't seem to alter the pups' sound at all when sustainer is off...
What I would like to try out now is : totally isolate the sustainer coil from TDA driver amp/guitar "ground"... maybe using an isolation transformer ?
...yeah, I know: Why ? IDK.. it's just a hunch I have about maybe curing the "fizz" (although I'm using just the minimal power necessary to excite the strings, a residual signal is fed-back to the bridge pup, magnetically along the strings I think, thus altering the pup's sound -even more trebly- AND inducing a sort of "fizzy", light distortion which is annoying because I want a "clean guitar" feedback, not the metal-divebomb-thing... oh, well maybe just a little )
It would go like : driver-amp & guitar-gnd to primary/secondary to sustainer coil... (I think it would introduce a 240° (?) lag, which might be good... or not, IDK ! gotta try...)
So... would a transformer work to isolate guitar-ground from driver-coil AND still transfer driver-amp's power to it? If so, what would be a ballpark primary/secondary relationship & values (1 : ?... ? : 1... ohm values ? TDA amp puts out less than a watt) so I don't fry everything 1st try... Induction theory is sooo fuzzy to me...)
Well, thanks for reading!
See ya...
Like many guitar enthusiasts, I've built myself a DIY electro-magnetic guitar sustainer (-oh, that's sooo 2009... ! )
It's a TDA7052a 1W amp/32AWG 14 ohm-ish flat 2mm coil-over-neck-pickup combo, which works surprisingly well (although I still had to "modify" bridge & neck pick-up poles to improve response, i.e. swapping the poles around so they would "follow" my Strat's neck radius hence, driver coil being that much closer driving the strings (high B & E in particular). The mod doesn't seem to alter the pups' sound at all when sustainer is off...
What I would like to try out now is : totally isolate the sustainer coil from TDA driver amp/guitar "ground"... maybe using an isolation transformer ?
...yeah, I know: Why ? IDK.. it's just a hunch I have about maybe curing the "fizz" (although I'm using just the minimal power necessary to excite the strings, a residual signal is fed-back to the bridge pup, magnetically along the strings I think, thus altering the pup's sound -even more trebly- AND inducing a sort of "fizzy", light distortion which is annoying because I want a "clean guitar" feedback, not the metal-divebomb-thing... oh, well maybe just a little )
It would go like : driver-amp & guitar-gnd to primary/secondary to sustainer coil... (I think it would introduce a 240° (?) lag, which might be good... or not, IDK ! gotta try...)
So... would a transformer work to isolate guitar-ground from driver-coil AND still transfer driver-amp's power to it? If so, what would be a ballpark primary/secondary relationship & values (1 : ?... ? : 1... ohm values ? TDA amp puts out less than a watt) so I don't fry everything 1st try... Induction theory is sooo fuzzy to me...)
Well, thanks for reading!
See ya...
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