Tuner pedal q : (Andi?)

[Sporky_McGuffin]

Andi (or anyone else) :

if I wanted to put a little buffer in a teeny box - just and in, out and a 9v jack (no battery) would something like this suffice

Yup. Absolutely fine, though I'd add drain resistors on the "outside" of the decoupling caps. And you'll need two more resistors to create Vref and a cap to decouple the power supply. Or be really clever and use the other op-amp in the chip to generate Vref. I don't normally use such a big output cap but it'd work just fine.

If you wanted I could do you a basic op-amp buffer PCB and the components for a couple of pounds.

[timmyo]

Yup. Absolutely fine, though I'd add drain resistors on the "outside" of the decoupling caps. And you'll need two more resistors to create Vref and a cap to decouple the power supply. Or be really clever and use the other op-amp in the chip to generate Vref. I don't normally use such a big output cap but it'd work just fine.

If you wanted I could do you a basic op-amp buffer PCB and the components for a couple of pounds.

I'm guessing this step would neatly sidestep me not understanding any of the preceding sentences ?

[timmyo]

If you wanted I could do you a basic op-amp buffer PCB and the components for a couple of pounds.

ooh - I just remembered that I have an enclosure that I never made an A/B out of : it has 3 stereo jacks in it and a DPDT switch.

Could a simple circuit be chucked in that was the buffer, with the switch punting the signal to one of the jacks as a tuner out, while grounding the main o/p ?

[timmyo]

ooh - I just remembered that I have an enclosure that I never made an A/B out of : it has 3 stereo jacks in it and a DPDT switch.

Could a simple circuit be chucked in that was the buffer, with the switch punting the signal to one of the jacks as a tuner out, while grounding the main o/p ?

hmm - the box looks mighty full already . . .

[Sporky_McGuffin]

I'm guessing this step would neatly sidestep me not understanding any of the preceding sentences ?

Yup. I do not intend to "go into" kits, but I could do you a little bag with a PCB, the components and a drawering of what goes where.

ooh - I just remembered that I have an enclosure that I never made an A/B out of : it has 3 stereo jacks in it and a DPDT switch.

Could a simple circuit be chucked in that was the buffer, with the switch punting the signal to one of the jacks as a tuner out, while grounding the main o/p ?

Yes. The buffer board would likely be under 1" square.

And with the buffer there you could leave the tuner out live all the time and just mute the main out with the switch, which'd mean you'd have a switch pole spare for an LED.

I've done ABs (no buffer, but 9v socket and LED) in enclosures 5.5cm x 6cm, or 9cm x 3cm, so unless you drilled the holes in REALLY stupid places you should be fine.

[timmyo]

Yup. I do not intend to "go into" kits, but I could do you a little bag with a PCB, the components and a drawering of what goes where.



Yes. The buffer board would likely be under 1" square.

And with the buffer there you could leave the tuner out live all the time and just mute the main out with the switch, which'd mean you'd have a switch pole spare for an LED.

I've done ABs (no buffer, but 9v socket and LED) in enclosures 5.5cm x 6cm, or 9cm x 3cm, so unless you drilled the holes in REALLY stupid places you should be fine.

YHM

[Sporky_McGuffin]

So I do! How did you know?