Marshall 2203 Amplifier

Another EasyEDA user asked me to try an build a MARSHALL 2203 Guitar Amplifier, BUT as a low wattage, single-ended guitar amplifier.

What I have done is kept the preamp circuit exactly as the 2203 (two 12AX7 Vacuum tubes, Hi and Low Inputs and Tone Control Circuit) , but made the output amplifier single-ended using a single EL84 Vacuum Tube and Elcor-USA Output Transformer.

Also, the 2203 has a built-in effects effects circuit board, but I have provided  Send and Receive Jacks to add external effects!

The "Presence" control circuit can be omitted, as I am not sure it will work with a single-ended circuit.

CORRECTION: R17 and R18 should be 100 ohms (not 100K ohms!!!)

Unverified!

(NOTE: for some unknown reason, the pcb on my laptop will not render in 3D using EasyEDA. I contacted them, but it renders on their computers fine.)