User manual BOLEX B8

[. . . ] (including To release the retracting handle, press down and push it towards the back of the projector. To replace, fully depress the handle and push forward. 100 % automatic threading with BOLEX 400 ft. lamp 40 % of its full power Silent or sound projection Speeds: 18 and 24 f. 12 V/100 W iodine-quartz Lamp warming-up at approximately Separate motor for cooling Socket for intermission Counter: light 1 unit = about 25 frames Transistorized Built-in 2 W/5 amplifier, 4W power output with 5% harmonic distortion +5 ohms loudspeaker Connection for external 6 W/5 Tone control during playback + 5 ohms loudspeaker Recording and playback operated by keyboard switches or microphone Superimposition microphone Sound level control with luminous V. [. . . ] If the film calls for a commentary, you can use the microphone for public address by means of the mixing console (see page 22). 4 5 1 2 3 4 5 STOP position Forward motion, Forward motion, Reverse motion, Reverse motion, lamp lamp lamp lamp switched on at reduced power on switched on at reduced power on In reverse motion and at STOP (positions 1, 4 and 5), the sound unit does not operate. Once the projection is begun, turn the lens mount until the picture is in sharp focus. Projecting sound films Sound is reproduced by means of the built-in loudspeaker (position a::] of the switch 28) or the external loudspeaker, fitted into the case. If using the latter, unwind the connecting cable and plug it into the socket 30. Placed near the screen, this loudspeaker provides higher sound quality and power; it works in both positions of the switch. If the switch is turned to a::] position and the external loudspeaker is not connected, the sound is cut off. Removing partially projected film If it is desired to remove a film before it has completely run through: · · First open the gate by swinging out the lens holder. Release the lower sprocket (diagram opposite) by pushing the shoe downwards. · Disengage the film firstly from this sprocket, then from the sound unit and the gate by pressing forwards the small lever k and lastly from the upper sprocket by pressing its lower shoe (I, diagram below). _--. J-'1:::::::-""'S-k 4. Pressure is withdrawn from the magnetic sound heads, thus avoiding unnecessary wear as well as accidental erasure. 5. Rewinding Attach the film to the core of the empty spool and move the control switch to R to set the projector running in reverse. 16 Musical fidelity depends on the quality of the magnetic sound stripe applied to the film. An unevenly distributed magnetic coating can shorten the life of the magnetic 'sound heads. This enables the motor to attain its normal speed and thus prevents any risk of wow and flutter at playback. · Move the control switch to M (lamp switched on at reduced power). The projector is running and you can follow projection during the recording. When it indicates zero (or when the first frame of the sequence to be recorded is projected), quickly press the two red recording switches and engage the tape recorder or record player, one or the other having already been prepared to play the chosen music. During knob C). recording, correct the sound level if necessary with the volume control · Press the green playback key at the end of recording. The same procedure can be followed when recording sound effects from a record or a tape. Note: It is unnecessary to re-set the counter at zero every time you interrupt recording. Simply run the projector in reverse for three units before resuming recording. 1 2 3 A superimposition · First above. · record is achieved as follows: the background sound as described Plug the microphone into the projector socket 19. 6. Sound superimposition (overplay) · Adjust the volume with knob meter. U. The red switch on the microphone is used to superimpose a commentary, sound effects and possibly music onto a previous recording (1) which is then automatically reduced to approximately 50 %. [. . . ] · Run the projector in reverse until the counter indicates three units less than the figure noted above. Erasing The magnetic track of the film passes over the erase head before reaching the recording heads. To erase the magnetic track without making a new recording: · Plug into socket 19 the record player cable without connecting it. Set the volume control knob · · · (5 at minimum. At the end of the corrected passage, immediately press the green keyboard switch to avoid erasing any of the rest of the original recording. Press the two red recording switches simultaneously. [. . . ]