Spacelog Apollo 8

Houston, Apollo 8. Over.

Apollo 8, Houston. Go.

Good afternoon, Jerry.

Howdy.

Okay. Somebody said something about checking out the evaporator—evaporators. What do you want to do?

Roger. Before we get too far along, we'd like to see, essentially with the secondary evaporator check, what we got on the redundant components check.

Okay. Stand by.

Roger. EECOM says to be sure and let it go for at least 5 minutes.

Roger. Now you want to check out the primary evaporator also, or did you decide it's not necessary?

I guess they decided it's not necessary, Bill.

Okay.

Okay. Secondary glycol loops coming on the line.

Roger, Bill.

And the secondary evap's coming on the line.

Roger.

And it's stabilized the leg, oh, for about 5 minutes.

Houston, Apollo 8.

Apollo 8, Houston. Go.

Apollo 8, Houston. Go.

Alright. What do you have in mind here in the way of activating the secondary loop prior to separation? It looks like if we do have a cabin fan problem, we won't be able to do a full-blown coldsoak. Is there anything that we can do that'll do any good?

Well, right now, Bill, in the checklist, we're showing this activation at about minus 1 hour. Let me check with EECOM for a minute and see if they got any more words considering the cabin fan situation.

Roger.

Apollo 8, Houston. Looks like a good time. One hour before SEP—entry interface would be fine.

Okay. It won't do any good, then, to fool around with these cabin temp valves. …

Bill, stand by. You're—got a lot of background noise.

Go ahead now, Bill.

Read me now, Jerry?

Loud and clear.

Okay. This coldsoak is built around the premise that you've got a cabin heat exchanger, in my view; and if you haven't got a cabin heat exchanger, I'm wondering just what you can do.

He's thinking.

Apollo 8, Houston. We think it'll still do a little bit of good so we'd just as soon go through with it.

Okay. Even bypassing the suit heat exchanger and that part of it too, huh?

That's affirmative.

Okay.

Also, Bill, your secondary loop is looking good.

Okay. We just had 5 minutes. I'll deactivate it now.

Houston, Apollo 8. Over.

Hey, Jerry. When do you want to crank up the VHF, anyway?

Roger. VHF Simplex—well, we had that on the checklist for about minus 4 hours.

Okay. We wanted—we wanted to put it out prior to MAX range, don't you think? Get an idea of when we're picking it up?

Apollo 8, Houston.

Go ahead.

Roger. Entry interface minus 4 hours is just about right for the VHF. That is about—oh, 142 GET.

Roger. Thank you.