MIL-DTL-25421C
For tests above the Ka band, a possible test frequency is 58,500 megacycles
per second, based on available oscillator tubes.
6.3.1 Specimen thickness. The thickness of specimens required for electrical
tests at the frequencies of 6.3 may be calculated by the following formula:
d=
Where:
d=
specimen thickness
λO =
free space wavelength
λC =
cut-off wavelength of wave guide
ε=
Approximate dielectric constant of sample
6.3.2 Source document. Further information on test of Class 3 material is
available in ARTC Report, "ARTC-4 Electrical Test Procedures for Radomes and
Radome Materials (Revised July 1960)," prepared by Aerospace Industries
Association of America, Inc., 1725 DeSales Street, Washington, D.C. 20036.
6.4 Barcol tester. Information concerning Barcol tester, model GYZJ 934-1, is
available from the Barber-Colman Company, Rockford, Illinois.
6.5 Keyword listing.
Barcol hardness
End item specimen
Laminate materials
Properties
Repairable defects
6.6 Changes from previous issue. Marginal notations are not used in this
revision to identify changes with respect to the previous issue due to the extent of the
changes.
16
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business