I've been tinkering with some ideas for a "pedal" for electric guitar/mandolin that would act as everything you need before the PA.
Anyway, the first module is to be a fully balanced line driver, installed inside the instrument's electronics cavity, for use with dual rail pickups. This will feed to the "pedal." A 6 or 7 pin cable will connect the instrument to pedal.
I am having a difficult time finding the right IC in this case. I keep finding things that would work, but are sooo tiny. I would really prefer to not deal with surface mount if possible.
I've looked at OPA1632 and LT1994, but again, everything for these purposes seems way too small; I'm going to be homebrewing my PCB's.
Any ideas?
Anyway, the first module is to be a fully balanced line driver, installed inside the instrument's electronics cavity, for use with dual rail pickups. This will feed to the "pedal." A 6 or 7 pin cable will connect the instrument to pedal.
I am having a difficult time finding the right IC in this case. I keep finding things that would work, but are sooo tiny. I would really prefer to not deal with surface mount if possible.
I've looked at OPA1632 and LT1994, but again, everything for these purposes seems way too small; I'm going to be homebrewing my PCB's.
Any ideas?
I would drop the idea of symmetrical guitar output. I did this a long time ago and found it quite impractical to handle: The cable twistes rapidly with anything different to standard 1/4" plugs like XLR connectors.
I recommend a simple JFET sourc-follower fed by 4V LiBat - it lasts for ages.
For best sound and hum suppression my favourites are stacked humbucker pickups.
Combininig this and appropriate wiring inside the instrument is fare more efficient than driving a symmetrical line.
Just my 2c
I recommend a simple JFET sourc-follower fed by 4V LiBat - it lasts for ages.
For best sound and hum suppression my favourites are stacked humbucker pickups.
Combininig this and appropriate wiring inside the instrument is fare more efficient than driving a symmetrical line.
Just my 2c
People have been dealing with MIDI cables coming out of their guitars for some time. Twisting could be an issue but this would be mitigated by a cable clip.
Electrical efficiency is a non-issue if the device I'm plugging into provides voltage.
I would think that a balanced output could have its benefits. After all, isn't a dual-rail pickup essentially outputting a balanced signal? It just typically gets summed, passively.
Anyway, as I said, I just can't seem to find a good IC that is not SMT.
Electrical efficiency is a non-issue if the device I'm plugging into provides voltage.
I would think that a balanced output could have its benefits. After all, isn't a dual-rail pickup essentially outputting a balanced signal? It just typically gets summed, passively.
Anyway, as I said, I just can't seem to find a good IC that is not SMT.
Stick to "garden variety" opamps - JFET Input for low current - Dual In Line Package (DIP)
Depending on your circuit -
If you need a dual op amp use TL052
IF you need a quad op amp use TL054
Cheers,
Ian
Depending on your circuit -
If you need a dual op amp use TL052
IF you need a quad op amp use TL054
Cheers,
Ian
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