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David,
Thanks. I have listened to your clip before and just recently; nice playing and great clarity.
Here's the circuit I am working with now. I am keeping a couple of things under my hat, but this is the basic flat-response circuit.
You are/were probably getting a bit more output from the bass strings than guitar strings. I could do medium impedance directly for guitar by using the Alembic formula - #40 AWG and 1000+ turns, but I am liking the onboard transformer , preamp, and low-Z for now.
This wouldn't work quite so well for bass because the response is about 3 dB down around 80 Hz and drops below that. Ultimately with this you would need bigger iron (a larger transformer) or to bridge the source impedance better to do a 4 string bass well, much less 5 string. The transformer/preamp approach is just peachy fine for guitar, though.
The one sneaky thing I am doing here is to bring the ultrasonic resonance down to about 20 KHz, damp it just enough with the 250K pot, and use it to boost the extreme high end to compensate for the HF dropoff of the cable.
This isn't a by-the-book preamp followed by a "proper" buffer, but it is good enough for rock 'n' roll with a decent 10-15 foot cable.
-Charlie
Thanks. I have listened to your clip before and just recently; nice playing and great clarity.
Here's the circuit I am working with now. I am keeping a couple of things under my hat, but this is the basic flat-response circuit.
You are/were probably getting a bit more output from the bass strings than guitar strings. I could do medium impedance directly for guitar by using the Alembic formula - #40 AWG and 1000+ turns, but I am liking the onboard transformer , preamp, and low-Z for now.
This wouldn't work quite so well for bass because the response is about 3 dB down around 80 Hz and drops below that. Ultimately with this you would need bigger iron (a larger transformer) or to bridge the source impedance better to do a 4 string bass well, much less 5 string. The transformer/preamp approach is just peachy fine for guitar, though.
The one sneaky thing I am doing here is to bring the ultrasonic resonance down to about 20 KHz, damp it just enough with the 250K pot, and use it to boost the extreme high end to compensate for the HF dropoff of the cable.
This isn't a by-the-book preamp followed by a "proper" buffer, but it is good enough for rock 'n' roll with a decent 10-15 foot cable.
-Charlie
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