Apollo Comms Part 3: Inside the S-Band Transponder

We take a closer look at the S-Band transponder from the Apollo command module, and marvel at the 5 transmitters and receivers it contains. The transponder was manufactured by Motorola, and is entirely solid-state. 0:00 Recap of previous episodes 1:56 Overall block diagram 5:49 Looking inside 11:18 Detailed explanation (with elevator music!) 16:28 Every wire of the transponder explained (in technicolor!) Our sponsors - PCBWay: fast turn PCBs, - Keysight: test instruments: - Samtec: connectors: Music credits: Crinoline dreams by Kevin Macleod Support the team on Patreon: Buy shirts on Teespring: Learn more on the companion site: Contact info: