I am going to try and construct a theremin using the design from this website.
I have redrawn the circuit to better see how it connects together and try and work out a bit more about how it works. The redrawn circuit can be found here.
The problem I have is that Q6 and Q7 on the redrawn circuit, which are both 2N5486 FETs (JFETs I think, the two FETs on the Volume resonant circuit and voltage controlled amplifier of the strangeapparatus.com circuits) seem to be out of production, and all the replacements I've looked for (by googling replacement 2N5486) are out of production too. Does anyone know of a replacement part that is still in production, and which criteria on the datasheet have to be matched up to find the replacement?
I have redrawn the circuit to better see how it connects together and try and work out a bit more about how it works. The redrawn circuit can be found here.
The problem I have is that Q6 and Q7 on the redrawn circuit, which are both 2N5486 FETs (JFETs I think, the two FETs on the Volume resonant circuit and voltage controlled amplifier of the strangeapparatus.com circuits) seem to be out of production, and all the replacements I've looked for (by googling replacement 2N5486) are out of production too. Does anyone know of a replacement part that is still in production, and which criteria on the datasheet have to be matched up to find the replacement?