Suggestions to turn this into an excellent onboard preamp for a guitar with two batteries:
- use LF442 to reduce current draw - omit the clip LED and the circuit that drives it
- use the batteries as symmetrical supply (+/-9V): omit the voltage divider (2*15k + 220uF), replace the remaining 220uF with 100uF and 100nF (ceramic) in parallel, for each side of the supply.
- maybe make two versions: one with external pots. One with board-mounted trimpots for TMB (all in a row) and external volume pot.
Suggestions to turn this into an excellent onboard preamp for a guitar with two batteries:
ReplyDelete- use LF442 to reduce current draw
- omit the clip LED and the circuit that drives it
- use the batteries as symmetrical supply (+/-9V): omit the voltage divider (2*15k + 220uF), replace the remaining 220uF with 100uF and 100nF (ceramic) in parallel, for each side of the supply.
- maybe make two versions: one with external pots. One with board-mounted trimpots for TMB (all in a row) and external volume pot.
Verified! I don't know what the original sounds like, but this sounds great. Very clean.
ReplyDeleteThanks a lot!
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