There’s some photos from DL&W’s Hampton Yard (Near Scranton, PA), including a few night photos, dated from 1937.
And some construction photos like this one, which answer the age-old question of how many cranes it took to install a car retarder – at L&N’s Hills Park/Tilford Yard. 🙂
And finally, lots and lots of photos of the Velac equipment drawers, circuit boards, and RF units from Canadian National’s Montreal Yard. RF units like these were used to transmit a radar frequency and to detect the difference (Doppler) frequency between the transmitted and received signals to detect the speed of the rolling cars. Further reading about the Velac VR-1 system can be found here.
R thru U coming soon. Enjoy!