Tape Move Sensor
for all Revox B77 and PR99 MK I


1.177.321-23 optical scanning
For repairs we always used old stock. A loose coil on the old circuit board can be glued. Other repairs were done by replacing individual components or the entire circuit board.

No coils, no resonant circuit and ready for the future!
the technique

The circuit

not much


Two receiving and one transmitting diode, three resistors, two ICs and one capacitor are all there. The optional direction of rotation detection is already included.
Revox B77 Tape Move Sensor from revox-online
Tape Move Sensor for Revox B77 with aluminum traverse from revox-online

Alu-Cross


The tape move sensor with an aluminum bracket is required for tape machines with an aluminum traverse. During assembly, the tape move sensor is pushed as far as possible towards the motor and screwed on. The plug is coded, there is no mistake.
Real plug and play, it couldn't be easier!

steel truss


The version with aluminum plate is required for the Revox B77 with steel traverse. Here is only screwed and plugged. It is really that easy!
Tape Move Sensor Revox B77 with steel traverse from revox-online
Reflector foil on the winding motor of the Revox B77 from revox-online

Reflector


This reflector foil is required for the optical scanning to work. You will receive a suitable self-adhesive and punched foil for each new tape move sensor. Clean the engine before sticking. Nothing else to do. If you glue the black areas over the three openings on the motor, you can cut the openings freely - but it is not necessary. The openings are not for cooling.

noise

If you hear repetitive rhythmic croaks coming from the speaker, something like this
uuuh     uuuh     uuuh
or at the higher speed
uh  uh  uh  uh  uh  uh
then the tape move sensor should be replaced!

DANGER! Never lay the tape machine on its front!
Studer Revox B77, revox-online

 

Tape Move Sensor from revox-online

Tape Move Sensor with optical scanning from revox-online

if you want the best!

the new tape move sensor
1.177.321-23

for all Revox B77 and PR99 MK I can be found in our shop
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