Hi,
Well, seeing as I have a few guitars, and some peizo-equipped acoustics, I have finally got around to making the tillman premap cable for them.
FET Preamp Cable
One question, does it 'really' matter how long the cable is between the FET part (inside the Jack housing) and the power supply/output cap ?
I realise the output impedence is around 6.8K (using his values) so I'm guessing the cable can be up to 5m long.
I'm planning on prototyping it to get the biasing right, before putting it into a Jack housing. I'm not using a microphone cable, just a standard unbalanced cable, with a mono 3.5mm plug at the other end, going into to power supply box. (which will be a small 1.1V to 9v high frequency boost converter, as I hate 9v batteries).
Does anyone see anythign wrong with this setup? (ignoring noise from the boost converter). I could use a 2-core cable, as per his original design, but thats just extra cost![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Blueteeth
Well, seeing as I have a few guitars, and some peizo-equipped acoustics, I have finally got around to making the tillman premap cable for them.
FET Preamp Cable
One question, does it 'really' matter how long the cable is between the FET part (inside the Jack housing) and the power supply/output cap ?
I realise the output impedence is around 6.8K (using his values) so I'm guessing the cable can be up to 5m long.
I'm planning on prototyping it to get the biasing right, before putting it into a Jack housing. I'm not using a microphone cable, just a standard unbalanced cable, with a mono 3.5mm plug at the other end, going into to power supply box. (which will be a small 1.1V to 9v high frequency boost converter, as I hate 9v batteries).
Does anyone see anythign wrong with this setup? (ignoring noise from the boost converter). I could use a 2-core cable, as per his original design, but thats just extra cost
Blueteeth