The Rikstone Reverb is a standalone reverb unit based on my own design. The unit can provide both clean echo and echo that is characteristical for the instrumental Surf music in the 60's. There is also a true by pass which can be used together with a foot pedal. The unit can even be used as a  tube preamp by turning the reverb off.

Technical data:

Inputs: 1 Guitar, 1 Foot pedal input
Outputs: 1
Controls: REVERB, VOLUME, FOOT PEDAL
Tubes: 2 x 12AX7
PT: 230V/250V 230V/6.3V
RT: TF22921
Reverb tank Accutronics 3-Springs tank #9AB3C1B
Rectifier: Semiconductor diodes