I downloaded LTSpice and I'm on day two of learning how to use it. I am working on modeling the preamplifier section of my Gallien-Krueger 200RB bass amp, discussed in another thread (or two). My knowledge of electronics is very limited so:
Could use some help understanding LTSpice:
1. How do I make the op-amps the correct values? The amp has LF535N and LF351N op-amps. I placed generic ones in there as a placeholder. It seems like the amp uses only three leads from the opamp?
2. LTSpice seems to be missing some basic components; how can I insert a mechanical (not voltage-controlled) switch such as the ones used here for lo-cut, etc? I downloaded and used a potentiometer from a third-party.
3. LTSpice does not include the exact diodes in this amp (IN759). Can I substitute any other diode with vbreakdown=12v?
4. Are my J113 JFETs "wired" right?
I glossed over a couple other things in this schematic for now, such as grounds at input jacks (how to do this?) and the effects send/return.
Any help on any of these questions or feedback on how this looks so far would help me get down the road. 🙏
I'm attaching the LTSpice file, the original schematic, and the spec sheet for the op-amp.
Could use some help understanding LTSpice:
1. How do I make the op-amps the correct values? The amp has LF535N and LF351N op-amps. I placed generic ones in there as a placeholder. It seems like the amp uses only three leads from the opamp?
2. LTSpice seems to be missing some basic components; how can I insert a mechanical (not voltage-controlled) switch such as the ones used here for lo-cut, etc? I downloaded and used a potentiometer from a third-party.
3. LTSpice does not include the exact diodes in this amp (IN759). Can I substitute any other diode with vbreakdown=12v?
4. Are my J113 JFETs "wired" right?
I glossed over a couple other things in this schematic for now, such as grounds at input jacks (how to do this?) and the effects send/return.
Any help on any of these questions or feedback on how this looks so far would help me get down the road. 🙏
I'm attaching the LTSpice file, the original schematic, and the spec sheet for the op-amp.
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If you right click on component and click on "pick new" yo uwill get a list of what is available. Click on the one you want.
For a switch just add in a line to short required lines.
For a switch just add in a line to short required lines.