Media Summary: We take a closer look at the S-Band power amplifier from the We demonstrate a locked bidirectional link between Earth and our We take a closer look at the S-Band transponder from the

Apollo Comms Part 2 Inside - Detailed Analysis & Overview

We take a closer look at the S-Band power amplifier from the We demonstrate a locked bidirectional link between Earth and our We take a closer look at the S-Band transponder from the We build a Phase Locked Loop (PLL) FM demodulator for extracting the Barely a year after the first black and white TV transmission from the Moon, NASA upgraded it to color. This is how this was done, ... It's aliiive! We very cautiously turn on our transponder for the first time.

We fix our Updata Link Test box by solving the mystery of the missing analog components. We X-ray mysterious Motorola modules ... Important step to get right! We figure out the 120V 400 Hz 3 phase power connections and the power supply control relays from ... Our first successful video transmission using the original We need to figure out where over 650 inputs should hook up to our

Photo Gallery

Apollo Comms Part 2: Inside the Traveling Wave Amplifier
Apollo Comms Part 6: First tone transmission, to the Moon and back!
Apollo Comms Part 3: Inside the S-Band Transponder
Apollo Comms Part 15: Combining Voice, Data and Ranging
Apollo Comms Part 30: We explain and debug modern (CD4046B) and vintage (Apollo) PLL circuits.
Apollo Comms Part 22: How NASA Upgraded the Moon TV to Color
Apollo Comms Part 25: Apollo-HP Nixie Space Clock
Apollo Comms Part 5: Transponder first power on.
Apollo Comms Part 18: Solving the mystery of NASA's Updata Link box missing parts
Apollo Comms Part 4: Transponder power up preparation, and more original equipment found.
Apollo Comms Part 10: Apollo SDR reboot and first voice transmission!
Apollo Comms Part 21: TV from the Moon
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Apollo Comms Part 2: Inside the Traveling Wave Amplifier

Apollo Comms Part 2: Inside the Traveling Wave Amplifier

We take a closer look at the S-Band power amplifier from the

Apollo Comms Part 6: First tone transmission, to the Moon and back!

Apollo Comms Part 6: First tone transmission, to the Moon and back!

We demonstrate a locked bidirectional link between Earth and our

Apollo Comms Part 3: Inside the S-Band Transponder

Apollo Comms Part 3: Inside the S-Band Transponder

We take a closer look at the S-Band transponder from the

Apollo Comms Part 15: Combining Voice, Data and Ranging

Apollo Comms Part 15: Combining Voice, Data and Ranging

We demonstrate the full

Apollo Comms Part 30: We explain and debug modern (CD4046B) and vintage (Apollo) PLL circuits.

Apollo Comms Part 30: We explain and debug modern (CD4046B) and vintage (Apollo) PLL circuits.

We build a Phase Locked Loop (PLL) FM demodulator for extracting the

Apollo Comms Part 22: How NASA Upgraded the Moon TV to Color

Apollo Comms Part 22: How NASA Upgraded the Moon TV to Color

Barely a year after the first black and white TV transmission from the Moon, NASA upgraded it to color. This is how this was done, ...

Apollo Comms Part 25: Apollo-HP Nixie Space Clock

Apollo Comms Part 25: Apollo-HP Nixie Space Clock

We power up

Apollo Comms Part 5: Transponder first power on.

Apollo Comms Part 5: Transponder first power on.

It's aliiive! We very cautiously turn on our transponder for the first time.

Apollo Comms Part 18: Solving the mystery of NASA's Updata Link box missing parts

Apollo Comms Part 18: Solving the mystery of NASA's Updata Link box missing parts

We fix our Updata Link Test box by solving the mystery of the missing analog components. We X-ray mysterious Motorola modules ...

Apollo Comms Part 4: Transponder power up preparation, and more original equipment found.

Apollo Comms Part 4: Transponder power up preparation, and more original equipment found.

Important step to get right! We figure out the 120V 400 Hz 3 phase power connections and the power supply control relays from ...

Apollo Comms Part 10: Apollo SDR reboot and first voice transmission!

Apollo Comms Part 10: Apollo SDR reboot and first voice transmission!

We use an SDR radio to talk to our

Apollo Comms Part 21: TV from the Moon

Apollo Comms Part 21: TV from the Moon

Our first successful video transmission using the original

Apollo Comms Part 36: PCM pinout discovery saved by "SCE to AUX"

Apollo Comms Part 36: PCM pinout discovery saved by "SCE to AUX"

We need to figure out where over 650 inputs should hook up to our