Media Summary: We fix our Updata Link Test box by solving the mystery of the missing analog components. We X-ray mysterious Motorola modules ... We take a closer look at the S-Band transponder from the We demonstrate a locked bidirectional link between Earth and our

Apollo Comms Part 34 Trying - Detailed Analysis & Overview

We fix our Updata Link Test box by solving the mystery of the missing analog components. We X-ray mysterious Motorola modules ... We take a closer look at the S-Band transponder from the We demonstrate a locked bidirectional link between Earth and our We return our modified NASA transmitter and receiver to their original In the last episode, we managed to send Up Data commands using a PSK transmitter made up of HP equipment. But we were ... Important step to get right! We figure out the 120V 400 Hz 3 phase power connections and the power supply control relays from ...

We build a Phase Locked Loop (PLL) FM demodulator for extracting the We back out the last remaining modification from our NASA receiver and return it to its original Our first successful video transmission using the original

Photo Gallery

Apollo Comms Part 34: Trying every function of the Apollo command system
Apollo Comms Part 35: PCM Telemetry - Power Up
Apollo Comms Part 18: Solving the mystery of NASA's Updata Link box missing parts
Apollo Comms Part 3: Inside the S-Band Transponder
Apollo Comms Part 6: First tone transmission, to the Moon and back!
Apollo Comms Part 13: We successfully repair both our NASA transmitter and receiver!
Apollo Comms Part 33: Is there something wrong with our NASA Up Data Link transmitter?
Apollo Comms Part 4: Transponder power up preparation, and more original equipment found.
Apollo Comms Part 25: Apollo-HP Nixie Space Clock
Apollo Comms Part 10: Apollo SDR reboot and first voice transmission!
Apollo Comms Part 30: We explain and debug modern (CD4046B) and vintage (Apollo) PLL circuits.
Apollo Comms Part 29: Downvoice
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Apollo Comms Part 34: Trying every function of the Apollo command system

Apollo Comms Part 34: Trying every function of the Apollo command system

We finally have our

Apollo Comms Part 35: PCM Telemetry - Power Up

Apollo Comms Part 35: PCM Telemetry - Power Up

We look inside and power up the

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 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 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 13: We successfully repair both our NASA transmitter and receiver!

Apollo Comms Part 13: We successfully repair both our NASA transmitter and receiver!

We return our modified NASA transmitter and receiver to their original

Apollo Comms Part 33: Is there something wrong with our NASA Up Data Link transmitter?

Apollo Comms Part 33: Is there something wrong with our NASA Up Data Link transmitter?

In the last episode, we managed to send Up Data commands using a PSK transmitter made up of HP equipment. But we were ...

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 25: Apollo-HP Nixie Space Clock

Apollo Comms Part 25: Apollo-HP Nixie Space Clock

We power up

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 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 29: Downvoice

Apollo Comms Part 29: Downvoice

We back out the last remaining modification from our NASA receiver and return it to its original

Apollo Comms Part 21: TV from the Moon

Apollo Comms Part 21: TV from the Moon

Our first successful video transmission using the original