The Grey Boxes
The Collins S Line

Collins equipment. You’re ready for it now.
It was natural to compromise on equipment at first. Gradually your station improved. But, you’re still dissatisfied. You’ve spent frustrating years with a series of rigs. Even if it costs more, you’re thinking about a station that offers truly dependable performance, more enjoyment, fewer headaches. Now is the time to talk it over with your Collins distributor. You’re ready for the S/Line or the KWM-2A.
Why Purchase Collins Amateur Equipment?*
- Collins offer the only 1 year warranty in the amateur field.
- All units are “burned in” 12 hours, then tested and calibrated.
- Every transmitter receives complete distortion measurements to ensure that intermodulation distortion is at least 30 dB down.
- Each unit is subjected to vibration an shock during transmit and receive.
- All signal specifications are quoted in “hard” microvolts, i.e., signal level across 50 ohms, which is 6 dB less than “soft” microvolts.
- Extensive use of highest quality MIL SPEC components.
- All equipment is hand wired using teflon coated wire.
- Exceptional reliability through proven, conservatively-rated design.
- Dedicated factory and distributor product support after the sale.
- Future product modification data furnished each owner free of charge through production life of equipment.
- Sound investment that offers excellent resale value.
*From 1977 insert in Collins Amateur Equipment brochure
- CCA COLLINS HISTORICAL ARCHIVES
- The Pre War Years
- The War Years
- Post War Broadcast / Commercial
- The Black Boxes
- The Grey Boxes
- 30L-1
- 30S-1
- 312B-4/5
- 32S-3
- 51S-1
- 51S-1 Detailed Physical & Operational Description
- 51S-1 HF Receiver - Blocksome
- 62S-1
- 75S-3B
- Collins Microphones
- KWM-1
- KWM-1 Accessories
- KWM-2/2A Accessories
- KWM-2/2A Transceiver
- S Line Accessories
- The “S” Word or Solid State