Fender - Dimension IV - sound expander
cred: reverb.com/The Jam Room
Fender - DIMENSION IV - sound expander
“Tel Ray began making analog guitar effects in the 60’s for companies like Fender. They made these effect boxes, which use an amps built in spring reverb via RCA, to act as external sources for watery vibrato, reverb, echo, delay and other effects. These units had to compete with guitar pedals, which made them far less in demand due to their size, transportability, and difficulty to fix. To this day, we still don’t know what the magnetic disc & wipers are made from. Tel Ray soon became Morley, in an attempt to say that their products emulated Leslie amps.The Dimensions IV features Vibrato and Reverb and an off/on switch. It’s pretty basic but offers incredible tone. The Vibrato works great, turn up the treble and you can hear how full it sounds thru the oil can. Supposedly the ‘slap back’ or delay timing can be reset/changed in the back of the unit. The reverb doesn’t function properly. I’m not sure if it’s my amps spring reverb that is weak, or if it’s a connection issue. All internal mechanics are intact, may need a tech to look at it. “
cred. reverb.com/Trays Vintage
fender - dimension IV sound expander
“The Dimension iv was built and designed for Fender by TelRay and produces sound in much the same way as the Morley EVO-1 by use of an oil can filled with a mysterious fluid (UCON B-65.) Unlike the EVO-1, the Dimension iv has a single speed motor, and no onboard power. The effect works by being routed with rca cables into the reverb channel of a Fender amplifier (where the reverb potentiometer controls the amount of the effect.) This is a very interesting, functioning relic from a bygone, far eerier time.Height is 6 in. (15.2 cm.), 8 1/2 in. (21.6 cm.) width, and 6 1/4 in. (15.9 cm.) deep. "
cred: gbase.com/Retrofret