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|  MIL-T-60826B(MU)
3.7.7 Power selector lever. - The power selector lever shall be
operable and shall firmly seat at -65 and +150F.
3.7.8 Lamp housing assemblies. - The lamp housing assemblies shall
be mechanically operable at standard ambient temperature and at extreme
temperatures of 3.3.2 to facilitate replacement of reticle lamp.
3.8 Electrical.
3.8.1 Reticle illumination. - With the reticle light for each reticle
energized by a 24 volt power source, the illuminated reticle shall appear
clearly defined when observed in a darkened area when the filters are in
the clear position.
3.8.2 Circuitry. - The circuitry of the telescope shall be in accord-
ance with the applicable electrical schematic drawings.
3.8.3 Dielectric strength. - There shall be no puncture of insulation,
no sparkover, no decrease in dielectric strength, when the insulated areas
of the circuitry is subjected to an alternating current (at) root mean
square (rms) potential of 500 volts plus twice the rate voltage at a fre-
quency of 60 cps for a period of 15 plus or minus 5 seconds.
3.8.4 Insulation resistance. - Unless otherwise specified on applicable
drawings, all insulation between ungrounded circuits and ground, and between
isolated circuits, shall have minimum resistance of 100 megohms with 500
volts direct current (dc) applied.
3.9 Interior atmosphere. - The interior atmosphere of the accepted
telescope shall contain nitrogen having a dew point at least as low as
-25F and the internal pressure of the telescope shall be 3 psi
0.5 psi.
3.10 Workmanship. - The workmanship requirements of MIL-F-13926 shall
be adhered to. Exterior protective surface finishes shall be free of
voids which may affect the protective qualities of the finish or appear-
ance. Optical surfaces shall be free of scratches and blemishes which
may affect their optical qualities or appearance.
4. QUALITY ASSURANCE PROVISIONS
4.1 Responsibility for inspection. - Unless otherwise specified in
the contract or purchase order, the supplier is responsible for the per-
formance of all inspection requirements as specified herein. Except as
otherwise specified, the supplier may utilize his own facilities or any
commercial laboratory acceptable to the Government. The Government
reserves the right to perform any of the inspections set forth in the
specification where such inspections are deemed necessary to assure
supplies and services conform to prescribed requirements:
4.1.1 General provisions. - The component and subassembly inspection
requirements of MIL-F-13926 form a part of the quality assurance provisions
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