Mike Collins (CAPCOM)

Apollo 8, Houston. Would you go S-band AUX switch to DOWN-VOICE BACKUP. Over.

Frank Borman (CDR)

DOWN-VOICE BACKUP. Roger and out.

Frank Borman (CDR)

Houston, be advised that it looks like your Quindars are clipping your voice during your transmission.

Mike Collins (CAPCOM)

Roger, Understand. Are we still experiencing this intermittent condition that was there a few minutes ago?

Frank Borman (CDR)

Not always, but often in the beginning and in the end of your transmission.

Mike Collins (CAPCOM)

Roger. Understand. I'll give it a little extra time.

Mike Collins (CAPCOM)

Apollo 8, Houston. Over.

Mike Collins (CAPCOM)

Apollo 8, Houston. Could you try to find us a better OMNI antenna? Over.

Mike Collins (CAPCOM)

Apollo 8, Houston. We are unable to read you on this OMNI antenna. Over.

Frank Borman (CDR)

Houston, Apollo 8. …

Mike Collins (CAPCOM)

Apollo 8, this is Houston. Over.

Mike Collins (CAPCOM)

Apollo 8, Houston. We understand you are copying us. While we are trying to reestablish contact with you, would you put your optics switch to zero? We show you are drifting off in trunnion and request that you zero your optics.

Mike Collins (CAPCOM)

Apollo 8, Houston. We copy your optics zeroed, and how are you reading us now? Over.

Mike Collins (CAPCOM)

Apollo 8, Houston. We are down to 25 percent on your waste water dump and ready to terminate. Over.

Mike Collins (CAPCOM)

Apollo 8, this is Houston. Over.

Frank Borman (CDR)

Go ahead, Houston. Apollo 8.

Mike Collins (CAPCOM)

Roger, Our next COMM test is ranging only test. I have four switches I would like you to throw, which will cause you to lose voice communications for approximately 3 minutes. Over.

Mike Collins (CAPCOM)

Alright. The first one is S-band NORMAL mode voice, OFF; the second, S-band NORMAL mode PCM, OFF; the third, S-band NORMAL mode RANGING switch to RANGING; and fourth, the S-baud AUX tape switch, OFF. Over.

Mike Collins (CAPCOM)

Apollo 8, Houston. Request S-band NORMAL mode RANGING to OFF and S-band NORMAL mode PCM to PCM. I say again. S-band NORMAL mode RANGING, OFF; S-band NORMAL mode PCM to PCM.

Mike Collins (CAPCOM)

Apollo 8, Houston. We'll stand by in this configuration for a moment.

Mike Collins (CAPCOM)

Apollo 8, Houston. Three communication switch positions. First, S-band AUX tape to DOWN-VOICE BACKUP; S-band NORMAL mode PCM, OFF; TELEMETRY INPUTS PCM, HIGH. I say again, S-band AUX tape to DOWN-VOICE BACKUP; S-band NORMAL mode PCM to OFF; TELEMETRY INPUTS PCM to HIGH.

Bill Anders (LMP)

Roger. Houston, this is Apollo 8. How do you read?

Mike Collins (CAPCOM)

Reading you weak but clear now, Bill.

Bill Anders (LMP)

Roger. We still have a bad look angle on this antenna.

Mike Collins (CAPCOM)

Apollo 8, Houston. Go ahead.

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Spoken on Dec. 22, 1968, 6:50 p.m. UTC (55 years, 3 months ago). Link to this transcript range is: Tweet

Frank Borman (CDR)

Please be informed that the … Over.

Mike Collins (CAPCOM)

Apollo 8. Houston. Unable to copy. After about a minute of this configuration, we're going to return to normal voice, and at that time we should be able to hear you better.

Frank Borman (CDR)

Roger. What … are we going through right now?

Mike Collins (CAPCOM)

Roger. We are in Mode 7 dash 10, and the COMM test mode is on page 223. Over.

Mike Collins (CAPCOM)

Apollo 8, Houston. Three switch positions. TELEMETRY INPUTS PCM switch to LOW; S-band NORMAL mode VOICE to VOICE; S-band NORMAL mode PCM to PCM. I say again, TELEMETRY INPUTS PCM switch, LOW; S-band NORMAL mode VOICE to VOICE; S-band NORMAL mode PCM to PCM. Over.

Frank Borman (CDR)

Roger. We're switching over to backup now.

Bill Anders (LMP)

We are reading you loud and clear, Houston.

Mike Collins (CAPCOM)

Apollo 8, Houston. Requesting S-band NORMAL mode ranging to RANGING. I say again. S-band NORMAL mode ranging to RANGE. Over.

Mike Collins (CAPCOM)

Apollo 8, Houston. Requesting S-band NORMAL mode ranging to RANGING. Over.

Mike Collins (CAPCOM)

Apollo 8, Houston. Over.

Frank Borman (CDR)

Houston, Houston, Apollo 8. How do you read?

Mike Collins (CAPCOM)

Beautiful, Frank. I'm reading you loud and clear. How me?

Mike Collins (CAPCOM)

Apollo 8, Houston. How do you read? Over.

Mike Collins (CAPCOM)

Apollo 8, this is Houston. Over.

Mike Collins (CAPCOM)

Apollo 8, this is Houston. Over.

Frank Borman (CDR)

Go ahead, Houston. Apollo 8.

Mike Collins (CAPCOM)

Roger. Reading you loud and clear. How me?

Frank Borman (CDR)

You're loud and clear, Michael.