16-mm sound motion pictures : a manual for the professional and the amateur (1953)

Record Details:

Something wrong or inaccurate about this page? Let us Know!

Thanks for helping us continually improve the quality of the Lantern search engine for all of our users! We have millions of scanned pages, so user reports are incredibly helpful for us to identify places where we can improve and update the metadata.

Please describe the issue below, and click "Submit" to send your comments to our team! If you'd prefer, you can also send us an email to mhdl@commarts.wisc.edu with your comments.




We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.

Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.

276 IX. SOUND-RECOKDING EQUIPMENT AND ARRANGEMENT distortion in sound recording and reproduction. The proceedings of Subcommittee 2 should be especially watched ; it is here that the conflicting design objectives of the various testing methods are to be resolved and measurement methods suited to any sound-recording system regardless of type are to be agreed upon and approved. Since these discussions are being held at the national level of standardization, technical societies, trade organizations, government groups, and all other constituent organizations involved, will be called upon to resolve the conflicts in design objectives at their specific levels in order to pave the way for effective ASA action. Semi-portable Equipment In semi-portable equipment, such as the Maurer Type 162B Kecording Amplifier, (Fig. 63), it is not uncommon to have the preamplifier, the fei £| |i| Qk Jjgk ISBf WBf "3Br .JSP1 ^Wr Fig. 63. Maurer type 162B amplifier for 16-mm sound recording. This compact unit includes: (jf) a single-stage microphone preamplifier (50 ohms input) ; {2) a 3-position dialog equalizer in the 200 ohms output circuit of the preamplifier; (3) a 4position 200 ohms mixer in which the preamplifier output is connected directly to mixer #1; (4) a 2-stage intermediate triode amplifier (200 ohms input, 500 ohms output) ; (5) a band-pass filter and a 500 ohms Tee pad master gain control, and a 3-position film loss correction equalizer marked +3, +6, +9; (6) an output amplifier (2 stages pushpull) of 50 ohms output impedance. This latter is a variable-gain amplifier that includes: (7) a compressor (non-adjustable) that has associated with it the item following: (8) a noise reduction amplifier. The power supply unit for this amplifier is in a separate case of about the same size and weight. main amplifier, the output amplifier, the noise-reduction amplifier, the volume compressor, and the band-pass filters and equalizers incorporated within a single unit assembly. This unit is 20 in. by 10 in. by 11 in. and