Media Summary: We build a Phase Locked Loop (PLL) FM demodulator for extracting the Important step to get right! We figure out the 120V 400 Hz 3 phase power connections and the power supply control relays from ... After having repaired two diode faults in our potted current switch module B11, we discovered a third fault. This time it's a short, ...

Apollo Comms Part 18 Solving - Detailed Analysis & Overview

We build a Phase Locked Loop (PLL) FM demodulator for extracting the Important step to get right! We figure out the 120V 400 Hz 3 phase power connections and the power supply control relays from ... After having repaired two diode faults in our potted current switch module B11, we discovered a third fault. This time it's a short, ... It's aliiive! We very cautiously turn on our transponder for the first time. We return our modified NASA transmitter and receiver to their original We back out the last remaining modification from our NASA receiver and return it to its original

We are treated to a very special tour of the nearby Stanford dish, and find evidence of its participation to the We demonstrate a locked bidirectional link between Earth and our

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Apollo Comms Part 18: Solving the mystery of NASA's Updata Link box missing parts
Apollo Comms Part 30: We explain and debug modern (CD4046B) and vintage (Apollo) PLL circuits.
Apollo Comms Part 19: Pre-Modulation Processor Grand Explanation
Apollo Comms Part 4: Transponder power up preparation, and more original equipment found.
Apollo Comms Part 25: Apollo-HP Nixie Space Clock
Apollo Guidance Computer Part 18: Module B11 rescue, Apollo 13 style
Apollo Comms Part 5: Transponder first power on.
Apollo Comms Part 20: Pre-Modulation Processor Power Up
Apollo Comms Part 13: We successfully repair both our NASA transmitter and receiver!
Apollo Comms Part 32: Breaking the Updata Link Code
Apollo Comms Part 29: Downvoice
Apollo Comms Part 16: Stanford Dish’s Apollo Past
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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

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 19: Pre-Modulation Processor Grand Explanation

Apollo Comms Part 19: Pre-Modulation Processor Grand Explanation

In preparation for powering up the

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 Guidance Computer Part 18: Module B11 rescue, Apollo 13 style

Apollo Guidance Computer Part 18: Module B11 rescue, Apollo 13 style

After having repaired two diode faults in our potted current switch module B11, we discovered a third fault. This time it's a short, ...

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 20: Pre-Modulation Processor Power Up

Apollo Comms Part 20: Pre-Modulation Processor Power Up

We power up the

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 32: Breaking the Updata Link Code

Apollo Comms Part 32: Breaking the Updata Link Code

We finally crack 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 16: Stanford Dish’s Apollo Past

Apollo Comms Part 16: Stanford Dish’s Apollo Past

We are treated to a very special tour of the nearby Stanford dish, and find evidence of its participation to 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