#disc echo

T-Rex - Binson Stereophonica Stereo Magnetic Disk Delay

a stereo version of the the T-Rex - Binson Echorec

s. more disc echo devices

Arbiter - Sounddimension

T-Rex - Binson Echorec Magnetic Disk Delay

disk delay pedal, at last, 7 years delayed

“T-Rex have recreated the original unit in amazing detail — ... Capable of delivering magical magnetic disk echoes, the T-Rex Echorec boasts four playback heads that allow for incredible flexibility, with adjustable drum speed, balanced inputs and outputs optimised for use in the studio, a "magic eye" vacuum tube input signal level indicator, and connections for external speed adjustment and bypass. ... - Boasts two recording heads (with short and long delays), along with an adjustable drum speed of +/- 20%. - Fitted with four switchable playback heads for superb sonic flexibility, each equipped with their own level control. - Includes a handy "Magic Eye" vacuum tube indicator, allowing you to precisely set the input signal level. - Ability to switch between repeats and swells.

Dimensions (H x W x D): 10 x 25 x 19 cm / 3.94 x 9.84 x 7.48 inches Weight: 2.6 kg / 5.73 lb Handcrafted in Denmark “

There are also some disk echo devices on the list provided by ESTECHO with useful pictures, maintainance and repair infos:

Binson EC 3 Magnetic drum delay from renowned Italian company Binson.

Melos EM-200 Very unique magnetic disk design. Rebranded under various names.

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"ESTECHO’s music relies on many old and capricious musical instruments and devices. Keeping them in working condition is often a challenge, and for many of them, operation, maintenance and servicing information is very hard to come by. Often, pages such as this one are the only source of info available, pre-internet manufacturers having long since gone out of business or simply not remembering ever having these products for sale. For this reason, we’ve decided to share tips, tricks and info we’ve gathered while using, maintaining and repairing such devices."

VOX - Model V807 ECHO REVERB

and the story about disc-echoes:

“ Ray Lubow and the Electrostatic Storage System Tape based echo effects units for guitar were growing in popularity in the late 1950s. These units recorded the original or "dry" signal from a guitar onto a loop of audio tape that passed over a series of playback heads, creating the "wet" effect of an echo. However, tape based echo units  required frequent head cleanings and periodic replacements of the tape loop. Electronic technician and entrepreneur Ray Lubow invented an echo device in 1958 that eliminated the need for audio tape and multiple tape heads. Lubow's motor driven "electrostatic storage system" and "delay apparatus" were granted US patents in 1960. Ray Lubow and his brother Marvin founded "Tel-Ray," a company located in Gardena CA dedicated to the production of tapeless echo effects devices for musical instruments.   At the heart of Lubow's "tapeless echo" design was a spinning platter oriented vertically inside a steel can. The specially treated metallic surface of the platter acted as a capacitor, allowing charges to be stored on it's surface. Several neoprene brushes made contact with the spinning platter. One brush recorded the audio signal onto the platter in the form of an electrostatic charge while several other brushes spaced around the platter played the sound back. The delay in playback caused by the rotation of the platter created an echo effect. Lubow's patent called for adding about a tablespoon of oil to the inside of the steel can to improve performance. A slight oil coating on the platter lubricated the brushes and helped the recorded signal from discharging prematurely. As a result, Lubow's electrostatic memory disk earned the nickname "oil can delay." The Thomas Organ "Electrostatic Memory Disk" Prior to acquiring the trademark rights for the Vox brand in 1965, Thomas Organ developed an echo circuit including an "electrostatic memory disk" for their home organs. Thomas adapted this echo circuit from their home organs for the Vox V807 Standard Echo Reverb. While Fender, Gibson and others were willing to pay Tel-Ray a license fee to utilize the tapeless echo design, Thomas Organ was not. The engineers at Thomas Organ designed an motor driven electrostatic echo storage device similar to the unit detailed in Lubow's patents but the Thomas version eliminated the need for oil. This small change may have been all that was necessary to work around the patents. The photo above of the rear of the V807 Standard Echo Reverb chassis offers a view of the rear plastic cover of the belt driven Thomas electrostatic memory unit. The thick wire located at the 2 o'clock position of the rear cover connected to the brush that recorded the electrostatic audio signal onto the spinning platter. The playback signal was picked up by wires mounted to brushes located at the 9, 10 and 3 o'clock positions on the plastic cover. The black grounded wire at the 4 o'clock position appears to connect to an "erase" brush. Grounding an area of the the disk would remove the electrostatic charge, erasing the recorded signal.“

MEAZZI-Reverb-Matic / BINSON-Echorec combination

Pavel Petrus, Innsbruck

Schaller - ECHO-SOUND

“ This is a tube echo effect with a system essentially identical as Binson Echorec. The delay arises from the principle of rotation of the magnetic disk with contactless sensing from tape recorder heads.  All inputs are good, the signal passes through and the effect works like a tube preamp for guitar or mic, too Tubes inside are 5x ECC83, 1x EM84, 1x EL84. “

Montarbo - Echo Unit model 112a