S/Line Accessories

Quick Reference...

312B-4 ... 312B-3 ... 516F-2 ... DL-1 ... 180S-1 ... 302C-3 ... 312B-5 ... PM-2 ... MP-1 ... 315D-2 ... 136B-2 ... TD-1 ... 399B ... 351E ... 351R ... Bandpass Filters ... SM-1 ... SM-2/-3 ... MM-1 ... MM-2 ... CC-2 ... CC-3 ... CT-1 ... CP-1 ... 55G-1



The 312B-4 integrates the 75S-3B, 32S-3, 30S-1 and accessories into an operating system. The KWM-2 and 30S-1 can also be integrated into an operating system by the 312B-4. A speaker, RF directional wattmeter with 200 and 2000 watt scales, and a phone patch are included in the console. Size: 10" W, 7-3/4" H, 12-1/4" D Weight: 8-1/2 lbs.

312B-4 in detail.



The 312B-3 contains a 5" x 7" speaker and connecting cable and is styled to match the S/Line and KWM-2. Size: 10" W, 7-3/4" H, 8" D. Weight: 4 lbs.


The 516F-2 can be used with the 32S-3 and KWM-2, supplying all voltages for them; 115 v, 50-60 cps, 400 cps with minor change. Size: 10" W, 7-3/4" H, 12" D. Weight: 28 lbs.

516F-2 in detail.



The DL-1 is a 100 watt resistive load which can be used for various tuning functions without putting the transmitter on the air. The DL-1 can be switched in and out of the circuit by a front panel switch or can be remotely controlled by the addition of another switch in the operating position. This unit reduces tune-up and testing QRM and requires no connecting or disconnecting of wires prior to operation. Weight is 2 lbs. 14 oz.


The 180S-1 is basically a 1 kw pi network for matching various antenna impedances to a 50 ohm coaxial transmission line in the range of 3-30 mc. In most cases it is used as an L network, but when the L network cannot match the desired antenna, the complete pi circuit is used. The variable vacuum capacitor employed in the output circuit can be connected either in series or shunt with the antenna. The 180S-1 is useful for tuning trailing wires on large aircraft.


The 302C-3 is valuable for checking the antenna system. It measures forward and reflected RF power. Two scales are provided: 0-200 watts and 0-2000 watts accommodating both high and low power transmitters. The 302C-3 is contained in two units: the coupler for connecting into a 50 ohm transmission line and the meter panel which is styled to match the S/Line.


Designed for use with the KWM-2 in fixed station operation, the 312B-5 provides limited separation of receive and transmit frequencies, phone patching facilities and a directional wattmeter. It includes a 5" x 7" permanent magnetic speaker. The PTO control selector can be set as follows: (1) Receive KWM-2, Transmit 312B-5; (2) Transceive KWM-2; (3) Transceive 312B-5. Other control functions are Voice Operated, Receive Only, Transmit Only, Phone Patch On-Off, and Station Mute. Cables are furnished for connections to the KWM-2. Size: 10" W, 7-3/4 " H, 12-1/4" D. Weight: 8-1/2 lbs.

312B-5 in detail.



The PM-2 is a lightweight, limited duty cycle power supply providing voltages needed for the KWM-2. The PM-2 quickly slides into place and connects to the rear of the KWM-2, ready to operate in minutes from either 115 v ac or 220 v ac at 50-400 cps as a complete portable SSB or CW station. Both transceiver and power supply can be packed in the lightweight CC-2 Carrying Case for portability. A small auxiliary speaker is included in the PM-2 for emergency use. Size: 14-3/4" W, 7-3/4" H, 4" D. Weight: 13.5 lbs.


The MP-1 converts a 12-volt automobile, aircraft or boat battery to the voltages required for the Collins KWM-1, KWM-2 or KWM-2A. The MP-1 includes a high voltage supply for the transmitter PA, bias and a low voltage supply for the amplifier. Size: 5-3/4" H, 3-3/4 " D, 11" W. Weight: 7-1/2 lbs.


The 351D-2 provides secure mounting for the KWM-2 in most automobiles. Cantilever arms fold out of the way when the KWM-2 is removed. The connector at the right end is the power plug; the connector at the left end can be used for control of antennas having band switching circuitry. Cables 20 feet in length are attached to each plug.


The 136B-2 is designed for use with the KWM-2 under mobile operating conditions. This noise blanker provides effective reduction of impulse-type noise. It differs from simple audio clipping circuits or series-type limiters by silencing ahead of the selective sideband filters. All necessary hardware and instructions are furnished for simple installation into the KWM-2. The 136B-2 requires a 40 mc antenna which can be used as a standard whip for the car radio. Weight is 1-1/4 lbs.


The TD-1 is designed for use when portability and operation on different frequencies are primary considerations. The molded plastic housing holds two steel tapes calibrated in meters, decimeters and centimeters. These tapes can be extended to the required length for a given frequency and locked in place. A permanent frequency-to-meters conversion chart is attached to the antenna housing. Each end of the tape is attached to a length of nylon line which acts as an insulator and a means for securing the antenna to structures of suitable height. A directional wattmeter should be used for initial tune-up to insure the proper frequency setting.


The 399B-4 is a crystal-controlled oscillator which is used for frequency control in place of the VFO in the 32S-3 Transmitter. Sockets are provided for four crystals which are selectable by switch. The 399B-5 is used in place of the VFO to control the transmit frequency in the KWM-2 Transceiver. The receiver remains PTO tuned. Crystals are not provided with either adapter.


The 351E can be used to secure the S/Line or KWM-2 equipments to bench or table in shipboard, airborne or vehicular installations. The 351E-1 will accommodate either the 75S-3B,-3C Receiver or the 32S-3 Transmitter; the 351E-2 will mount either the 516F-2 Power Supply or the 312B-4 Station Control; the 351E-3 will mount the 312B-3 Speaker. The 351E-4 has two snap-in clamps for secure installation of the KWM-2. The equipment can be easily un-clamped for removal without the use of tools. The unit is removed by pulling forward and lifting from the mounting plate.


The 351R-1 is a matching gray rack panel for mounting the 75S-3B,-3C, 32S-3, KWM-2, 30L-1, 62S-1 or 51S-1. The 351R-2 Rack Adapter is a panel for mounting the S/Line and KWM-2 accessories. The 516F-2, 312B-4 and 312B-5 can be mounted in the 351R-2. Both adapters are 8-3/4" H and 13-3/16" D behind the front panel. A supporting shelf holds the unit securely. Mounting hardware is furnished with each rack mount.
Details on separate page.


Plug-in filters are available for use in the 75S-3B Receiver to effectively reduce background noise by restricting the 455 kc IF bandwidth to that necessary for communication. The F455FA series of Mechanical Filters is available in 500 and 800 cps bandwidths for CW, 1500 cps bandwidth for teletype, 2.1 kc for SSB and 3.1, 4.0 or 6.0 kc for AM applications. The X455KQ-200 Crystal Filter with a 200 cycle bandwidth can be employed for maximum selectivity in CW.


Collins SM-1 is a high impedance, nonmetallic dynamic mike with a frequency response from 100-3500 cycles per second. It has an output level of -53 db. Finished in brushed satin chrome, this compact microphone is equipped with a rubber isolated stand and a five-foot length of Koiled Kord. Like the SM-2, it can be adjusted for various operating positions.


Collins SM-2/-3 is a slender, gray and chrome desk-top unit which blends perfectly with Collins' other station equipment. The SM-2 is omni-directional and provides excellent transmission for the amateur operator. The frequency response of the SM-2, 200-3,000 cycles, matches that of the S/Line and KWM-2. The SM-2 has an output level of -53 db and is equipped with a five-foot length of Koiled Kord and plug. It is mounted on a rubber isolated stand. A swivel permits a 60 swing for position adjustment. The SM-3 is identical to the SM-2 except for the addition of an integrated PTT button.


The Collins MM-1 is a pressure-operated dynamic microphone designed to fit your hand comfortably. This mike is engineered for maximum voice response, and its die-cast case is finished in brushed satin chrome. With its mounting button on the front, the MM-1 slips easily into a dashboard bracket supplied with the mike. When the MM-1 is removed from the dashboard bracket, the microphone is in position for instant transmission. A five-foot length of Koiled Kord with mike plug is supplied with the 22-ounce microphone. The MM-1 has a frequency response from 200-10,000 cycles per second and has an output level of -48 db.


The Collins MM-2 includes a high impedance reluctance microphone and single earphone which can be used in either a fixed station installation or with a mobile unit. The MM-2 has a frequency response from 100-7,000 cycles per second and an output level of -50 db. In mobile use, the earpiece and microphone unit permit the driver to operate his car with both hands while carrying out radio voice communication. Although it weighs only 3-1/2 ounces, the Collins MM-2 is built to withstand the strenuous demands of daily mobile operation. Its microphone boom has a 360 adjustment making it possible to angle the mike to the best pickup position. The MM-2 Microphone has a magnetic stray field shield to exclude unwanted noises. For optimum reception of signals, an adjustable tone arm in the MM-2 pipes sound directly into the operator's right or left ear, but does not cover the ear as conventional earphones do. The MM-2 is equipped with both mike and phone plugs.


The CC-2 is designed to hold the components of a portable Collins SSB or CW station. The KWM-2 plus the PM-2 Power Supply, the KWM-2 alone, the 30L-1, or the 51S-1 can be transported in the case. The CC-2 is adapted from the Samsonite Silhouette and includes a shock-resistant interior for the equipment. Weight: 9.5 lbs. empty.


The CC-3 is a specially built case for accessory components of a portable Collins SSB or CW station. The CC-3 has the same styling features as the CC-2. A molded interior allows the CC-3 to accommodate a 312B-5 (or 312B-4) Station Control Console, a 516E-2 (or MP-1) Power Supply, a TD-1 Dipole Antenna, as well as a supply of spare tubes and fuses. Weight: 10 lbs. empty.


Neutral gray, fire-resistant plastic cable ducts add to the trim appearance of the ham shack and enclose all of the connecting cables needed for Collins S/Line or KWM-2 single sideband station. Available in lengths of two feet, the ducts are equipped with fittings for easy and quick mounting on the side or top of the operating desk. Duct covers slide off to allow adding, rearranging or removing cables. 440E-1 CABLE The 440E-1 is similar to the cable which is supplied with the Collins 351D-2 Mobile Mount. This cable can be used to connect the KWM-2 with the MP-1 or 516E-2 Power Supply when the mobile mount is not used. 440F-1 CABLE The 440F-1 is five feet in length and can be used to connect either the S/Line or the KWM-2 to the 516F-2 Power Supply, allowing the 30S-1 to be placed a greater distance from other units of the S/Line and permitting greater flexibility of fixed station installations.
Details on separate page.


The CP-1 contains a set of crystal grippers and all the crystals for operation of the S/Line receiver, the S/Line transmitter or the KWM-2,-2A throughout the complete operating range. The crystals not supplied are those for the range of 5.0 to 6.6 mc and those which are already provided with the equipment. The packet is of a waterproof plastic material containing a pouch for each crystal and one for the grippers. The complete packet can be fastened into the CC-2 Carrying Case.


The 55G-1/LF Low-Frequency Tuner is a manually operated tuner that is an accessory unit for the 51S-1 Receiver. It improves the sensitivity and input selectivity of the 51S-1 between 200 and 2000 kHz, and greatly reduces cross modulation and spurious responses caused by strong broadcast station signals. Besides the tuner, the 55G-1 cabinet also contains a 4-ohm loudspeaker for the 51S-1. Size: 10" W, 7-3/4" H, 8" D.

55G-1 in detail.

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This Home Page was created by wa3key, Saturday, April 20, 1996
Most recent revision Tuesday, May 6, 1999