51SB
51SB SSB adapter. The B&W 51SB sideband generator with built-in AC supply was designed to match the 5100 transmitter. To be inserted between driver and final in transmitter.
Supplementary photos

376
376 B&W Antenna Switch 1kW, 5 positions.

600
600 B&W Grid Dip meter.

BW-5100
B&W Model 5100 Transmitter. This transmitter uses four 6146 tubes, two as AM modulators and two for final output. A review article can be found in QST magazine, March 1955. The engineers got things close to right in the design of the 5100. Tuning is non-critical, stability is satisfactroy, even on 10 meters. There is an abundance of modulation and adjustment is easy. This transmitter does not feature speech limiters or any of the popular modulation tricks. It's just pure audio modulating a pair of 6146's finals. The design is simple and effective. Other manufactures could have learned a lesson or two from this design.
Supplementary photos

BW-6100
Barker and Williamson Model 6100..less than 300. Production year 1962.
The first and only frequency sythesized Ham Transmitter. The model came out in 1962, and I believe it was the last product of the Barker and Williamson Company. 80-10 Meters, with direct frequency control...no VFO needed! AM, CW, and SSB..180 Watts. Extra Wide Coverage 3.5 - 4.1 MHz 7.0 - 8.0 MHz 14.0 - 15.0 MHz 21.0 - 22.0 MHz 28.0 - 29.0 MHz 29.0 - 30.0 MHz Nice coverage for MARS and more. Dial up the exact frequency and no zero beat. It was a unique Ham transmitter with none like it before or since. No other Ham manufacturer made anything like it! It has no other competitor at all. Collectable Ham Transmitter #1. It was and is the tops!
Supplementary photos

GridDip
Solid State B&W Grid Dip meter, cover 2-110MHZ in six ranges.