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530 JAMES A. MOSES November
A consolidation of the test data submitted by the users indicated unanimously favorable comments on all items of major importance and was so conclusive that the few minor modifications and changes made necessary by the test report did not require further testing before final adoption of the equipment. On February 27, 1950, the Projector Set AN/PFP-1-Q was classified standard type by Signal Corps Technical Committee action.
Before presenting further information about requirements for certain features included in the newly developed equipment, it is best that a description of the projector set AN/PFP-1 be given (Fig. 1).
This three-package unit consists of a projector, 20-w amplifier and speaker, with a screen and other accessories included as supplementary
Fig. 2. AN/PFP-1-Q Projector Component; case door open, showing location of reel arms, spares and accessories.
items in the set. The equipment has withstood all tests pertaining to severe temperature and humidity conditions. The projector is released expressly for use with incandescent lamps ; however, provisions have been made for use of a supplemental light source where greater illumination is required and this unit will be portable in nature and packaged in a fourth case. In development, particular attention was given to the corrosion protection of the projector, amplifier and loudspeaker. Where corrosion-resistant material was not practical due to design limitations, suitable treatment was given the material to assure its being satisfactory and durable. Basically the projector machine mechanism is comprised of a central casting of aluminum which is