This suggests me that sooner or later I will get rid of the half used Ic3, obtaining a better organization of the things. In fact only half of the rightmost TL062 (IC3) is employed. A total of 5 Operational Amplifiers are effectively used. OVERALL DESCRIPTION The preamp itself is based on three dual OpAmp TL062. If You are interested I have the fullsize 4000x4000 pixel image I can share. In the next post we'll see an overall description of the whole circuitry reversed engiinered.Įven if this implementation is maybe specific for a Cort A4, I will bet my Hamster balls You will find more or less the SAME setup on several other basses with very few variations. The smd circuitry is using a medium density scale so with some care is fully possible to apply some modifications, upgrades and of course some repair.The diode soldered " on the fly" in parallel with the power supply is to me useless as in my bass there is a schottky idiode in the battery cavity able to protect the circuit.The rightmost (half used) Opamp 3 is a Baxandall Mid Range Equalizer.The center Opamp 2 is a decoupler and a Baxandall "Bass & Treble" Equalizer.The leftmost Opamp 1 is used as pickups 1st stage amplifier & mixer.I will definitely replace them at the end of the reverse engineering with something more actual, like a triade of super expensive LT1352. Relative acceptable-noticeable Noise Level.till now ! It has a trade off to consider:
What to say? was TL062 engineered in mid ed in tons of battery powered music devices. The 3 active components are the omnipresent TL062 dual Operational Amps. The signal pocessing is performed "left to right" as we will see in next posts.
just to be clear.Ī little contribution using my paypal account: īut will leave active the 1st preamp stage of pickups amplificationĪnd related mixing. The toggle switch will only bypass the Equalizer. Preampickup: Bartolini MK-1 with 3-band EQĮx-factory stringing: XL D'addario Nickelwound. I personally think it's stunning beautiful !!!!! Isn't it ?