A few days ago printer2 pm'd me the address of an interesting web page that pointed out how simple the Fender Hot Rod Deluxe's solid state spring reverb was. I know very little about solid state circuits but I have attempted to create a layout using the HRD's schematic of the circuit and would like to get some other eyes on it. Please let me know if you see any problems. Another issue, what's the best way to derive the +16 and -16 volts needed for the TL072 chip? Are there wall worts available? The HRD taps the power transformer's fixed bias secondary to create and filter the +/-16v power. I do plan to recommend a dip socket which isn't shown on the layout. A reverb pan and 8 pin dip socket are also needed.