LM Series Crystal Calibrated Frequency Indicating EquipmentNAVY MODEL LM SERIES
Navy Model LM-15 Crystal Calibrated Frequency Indicating Equipment FUNCTIONAL DESCRIPTION This equipment provides a simple and reliable frequency indicating source between 125 kc and 20 mc for frequency setting and measurement of receivers, transmitters, signal generators, or any electronic devices where the frequency must be known. It is a heterodyne type of unit having a variable oscillator which may be point-checked against an internal crystal oscillator and its harmonics at frequent settings. An external signal may be mixed with the variable oscillator output by a wire or antenna connection to a binding post. A jack provided on the front panel permits the use of phones for listening to the heterodyne. The variable oscillator signal may be internally modulated. RELATION TO OTHER EQUIPMENT
MODEL POWER INPUT MECHANICAL DESIGN REMARKS i. Self-contained batteries LM-13 Self Contained Same as LM-1O less Mounted in Type Batteries shock mount base CRR-1O111 Carrying Case with Batteries LM-17 Self Contained Same as LM-10 Mounted in Type Batteries CKB-10111 Carrying Case and CKB-10110 Canvas Bag com- plete with batteries ii. DC supplied from other equipment LM-10 12/14-24/28 Minor Mechanical LF Het. Osc. fund. 200/260-260/475 revisions freq. changed LM-12 12-14/24/28 Same as LM-l0 Included in Type 200/260-260/475 CRR-10086 Water- proof Carrying Case LM-14 12/14-24/28 Same as LM-10 200/260-260/475 LM-16 12/14-24/28 Same as LM-10 Included in Type 200/260-260/475 CKB-10086 Water- proof Carrying Case LM-19 12/24-24/28 Same as LM-10 Included in Type 200/260-260/475 CRR-10086 Water- proof Carrying Case LM-20 12/24-24/28 Same as LM-10 Included in Type 200/260-260/475 CRR-10086 Water- proof Carrying Case iii. AC operation with rectifier unit LM-11 Rectifier Power Same as LM-l0 Unit CRR-20104 or CRR-20104A LM-15 Rectifier Power Same as LM-l0 Unit Type CKB- 20104 or CKB-20104A LM-18 Rectifier Power Same as LM-10 Unit CRR-20104AELECTROMECHANICAL DESCRIPTION POWER SUPPLY.- Self-Contained Batteries, i: 12 to 14 v dc, 0.6 amp
or 24 to 28 v, dc, 0.3 amp and 200 to 26O v dc, l0 ma or 260 to 475 v dc
30 ma.
FREQUENCY COVERAGE.-
PRESENTATION AND CONTROLS.-The drum and disc dials are precision ganged for accurate frequency readings. A panel trimmer is provided for setting the variable oscillator at any check point by heterodyne with the crystal oscillator or its harmonics. A head phone jack for a 600 ohm audio output is mounted on the front panel. FITTINGS AND ACCESSORIES.-The rf coupling terminal is a single binding post. A Navy Type 49025 Telephone Jack is used. CONSTRUCTION.-The waterproof carrying case provided is made of aluminum with an olive drab wrinkle finish. The frequency meter case is made of aluminum with a black wrinkle finish. MANUFACTURER'S OR CONTRACTOR'S DATA Bendix Radio Division, E. Joppa Rd., Towson 4, Md.
TUBE AND CRYSTAL COMPLEMENT (1) 76 (1) 77 (1) 6A7
REFERENCE DATA AND LITERATURE NAVSHIPS 900,217-1B: Handbook of Maintenance Instructions for Navy Model LM-19 and LM-20 Crystal Calibrated Frequency Indicating Equipment. TYPE (USAF): CLASSIFICATION: (NAVY): (ARMY): Not Classified STOCK NO.: (USAF): (NAVY): LM-10: F16-Q-160976-200 (ARMY): LM-1l: F16-Q-160480-200 LM-12: F16-Q-160482-200 LM-13 F16-Q-160484-200 LM-14: LM-15: F16-Q-160488-200 LM-16: F16-Q-160490-200 LM-17: F16-Q-160492-200 LM-18: F16-Q-160494-200 LM-19: F16-Q-160496-200 LM-20: F16-Q-160498-200 (ARMY): DESIGN COGNIZANCE: Navy, BUAER PROCUREMENT INFO.: PROCUREMENT COG.: Navy RDB IDENT. NO.: 2.1.3 F.I.I..N.: EOUIPMENT SUPPLIED POWER SUPPLY CATEGORY | iii | ii | iii| i | iii | ii | iii| i | ii | iii| iii NAVY MODEL | LM | 10 | 11 | 12 | 13 | 14 | 15 | 16| 17 | 18 | 19 | 20 | LBS | | | | | | | | | | | Heterodyne Frequency Meter, F16-F-92111-2390 | | | | | | | | | | | | CRR-74028 with Tubes plus CRR-40023B | | | | | | | | | | | | Crystal 8-5/8 x 8-1/8 x 8-1/2 | 11.5 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 Frequency Meter Mounting N16-M-64851-1001 | | | | | | | | | | | | Base CRR-10121 7 x 7-7/8 x 1-1/2 | .5 | 1 | 1 | 1 | | 1 | 1 | 1 | | 1 | 1 | 1 Shielded Power Cable 5 Cond,9 ft Bendix AL71723-3 | 1 | 1 | 1 | | | | | | | | 8 Cond, 9 ft Bendix AL75220 | | | | | | | | | | | 1 | 1 4 Cond, 9 ft Mission Bell 15-0A001-3 | 1.9 | | | | | 1 | 1 | 1 | | 1 | | Calibration Book | | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 Instruction Book | | 2 | 2 | 2 | 1 | l | 2 | 2 | 2 | 2 | 2 | 2 NAVAER 08-5Q- | | -35 |-36 | -37| -38| -45 |-48 | | | | | NAVSHIPS | | | | | | | | 95 |998,|900,|900,|900, | | | | | | | | 626|903 |002-|217-|217- | | | | | | | | | | 1B | 1B | 1B Waterproof Slip Cover | .25 | 1 | | | | 1 | | | | | | Spare Parts (Bulk Supply) | 15.25 | 1/3 | 1 | 1 | 1/3| 1 | 1 | 1 | 1 | 1 | 1 | 1 Rectifier Power Unit CRR-20104 or CRR-20104A | | | | | | | | | | | | 8-3/16 x 8-15/16 x 8-3/16 | 13.6 | | 1 | | | | 1 | | | 1 | | Shockproof Mounting Base for Rectifier | | | | | | | | | | | | CRR-10120 7-7/8 x 8-7/16 x 11/16 | .5 | | 1 | | | | 1 | | | 1 | | AC Input Cable, Shielded 3 Cond, 10 ft Bendix | | | | | | | | | | | | AL72091-2 | | | 1 | | | | | | | 1 | | 4 Cond, 10 ft Mission Bell 15-0A002-3 | 1.9 | | | | | | 1 | | | | | Waterproof Carrying Case CRR-10086 | | | | | | | | | | | | 9-5/16 x 10-9/16 x 11-27/32 | 7.5 | | | 1 | | | | 1 | | | 1 | 1 Carrying Case CRR-1O111 | | | | | | | | | | | | 9-5/8 x 9-3/4 x 15-7/16 | 13.5 | | | | 1 | | | | 1 | | | Waterproof Canvas Bag and Strap CMQ-10110 | 4.0 | | | | 1 | | | | 1 | | | TOTAL LESS MR PARTS | |14.15|29.9|21.4|34.0|14.15|29.8|21.4|29.0|29.8|21.4|21.4 TOTAL REFERENCES:The information enclosed here is excerpted from:Electronics Maintenance Book-Feb 1958- NavShips 900,000.
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