REQUIREMENTS: Physical characteristics.
MIL-W-3970/228
Dimensions and configuration: See figures 1, 2, 3, and 4, and tables I and II. Material: See table I.
Surfaces (sandblasting after machining permissible):
Internal: 63 microinches in accordance with ASME-846.1.
External: 125 microinches in accordance with ASME-846.1. Fungus resistance: Materials nutrient to fungus shall not be used.
Pressurization: See table I.
Penetrant inspection. No indication of any cracks at any location when tested in accordance with ASTM-E1417. Electrical characteristics:
Frequency range: See table I. VSWR: See table I.
Power:
Peak - See table I. Average - See table I.
Part or Identifying Number (PIN): M3970/22 - (dash number from table I).
Referenced documents. In addition to MIL-DTL-3970, this specification sheet references the following documents: ASTM-826/826M
ASTM-8179
ASME-846.1
ASME Y14.5M ASTM-E1417
Marginal notations are not used on this revision to identify changes with respect to the previous issue due to the extent of the changes.
Custodians: Preparing activity: Army - CR DLA - CC
Navy - EC
Air Force - 85 (Project 5985-2014-027) DLA - CC
Review activities: Army - MI
Navy - AS, CG, MC, OS Air Force - 19, 99
NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at https://assist.dla.mil/.
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