KWM 380 TRANSCEIVER LICENSE

SIL 1005 (23 Dec 60) for KWM-2/2A, 75S-1/2, 30S-1, 136B-2 вЂ“ Audio Instability In Calibrate Function, Excessive Hum On Carrier, Meter Calibration Resistor, T2 and L4 Same Part Number SIL 1002 (1 Aug 60) for KWM-2, KWM-2A вЂ“ Audio Squeal in Transmit When AF GAIN Control is Advanced SIL KWM2 (15 Nov 60) Servicing Information SIL 75S-1, 32S-1, KWM-2 (2 Feb 60) VFO Oscillator Drift SB1 (17 Apr 63) Extension of design specifications for input voltage limits Д¬ollins Service Information Letters (SIL): SB1 (22-Feb-71) 516E2 Add bleeder resistor to +260-VDC line to improve safety features SB1 (9-12-58) 516E1 Modification for use with positive ground SB2 (8-15-68) Second Mixer Plate Circuit Improvement SB2 (5-10-62) To minimize background hum level SB1 (3-9-62) To eliminate BFO parasitic oscillations SB1 (2-28-64) Improvement of operation of ALC circuit SB1 55G1 (25 Jul 69) Increase current handling capability of 115V line fuse SB7 (1-1-72) Reduce 500-Khz Spurious Response SB6 (1-9-71) Provision for high-speed receiver muting and recovery SB4 (8-9-65) Addition of dial lock assembly SB3 (8-11-64) Improve sensitivity of lower bands SB2 (6-15-79) Replacment of transformers T14 and T15 with mechanical filter SB1 (5-15-63) Reduced hum in audio output with use of 28-volt DC power supply SB2 (21-9-67) Removal of audio distortion SB1 (8-8-57) Improve VOX circuit to eliminate intermittent dropout, and improve operation of first audio amplifier SB3 (8-8-60) Add VOX relay time constant control SB2 (4-1-60) Improve carrier suppression SB3 (1-11-69) Reduce excessive ALC control SB2 (1-11-69) Prevent Intermittent dropout of plate overload relay SB1 (6-21-61) To increase operating life of PA tube SB4 (11-15-77) Operation from 230V AC Power Source SB3 (4-2-62) To lower operating temperature of PA tubes SB2 (2-20-62) Backward Deflection of ALC meter SB1 (21-8-61) Wiring change required before conversion from 115VAC to 230VAC SB10 (15-04-74) Eliminate VHF parasitic oscillations in tone oscillator, V2B SB8 (1-8-70) Eliminate AGC overshoot on noise pulses and provide dual time-constant action, Change source of delay bias to the AGC rectifier, Add delayed-decay (hang) AGC to the rf amplifier SB6 (1-11-62) To Eliminate Delay in Operation when Switching from Transmit to Receive Function SB5 (11-23-60) To Improve Transmit-Receive Exciter Tuning Coincidence SB4 (9-2-60) Improvement of ALC Action and Elimination of ALC Overshoot SB3 (01-10-71) Correlation Between Frequencies on Different Bands SB2 (10-01-60) Add Vox Relay Time Constant Control SB1 (9-12-58) Improvement in Calibrator Operation, Spurious Outputs of KWM-1, Transient i Speaker when switching from Receiver to Transmit, Hum in Speaker when AF Gain Control is Advanced in CW Operation, Tweats in Audio Output cased by DC Power Supply PageВ 4 The Collins Radio logos contained herein are Trademarks of Rockwell Collns Inc. copyrighted information and are used with permission. Please note that these documents contain Rockwell Collins, Inc. The Collins Radio Association desires to support the preservation and use of Collins amateur radio equipment by providing these Collins service bulletins, which will contribute to the continued use and enjoyment of Collins amateur radio equipmet, at no cost or obligation to CRA members and the general public for their own personal use, only.

KWM 380 TRANSCEIVER LICENSE

Rockwell-Collins Incorporated, 400 Collins Road NE, Cedar Rapids, Iowa, 52498, grants to the Collins Radio Association the non-exclusive, worldwide, royalty free license to reproduce and disseminate, in electronic and written format, any Collins Service Bulletins for Collins amateur radio products. Power relay & ceramic sockets for 516F-2.Refurbishing the Heathkit SB-610 and The 610C-2.

Kwm 380 transceiver