Hello ApolloHoax members,
After I have done some digging, and with some suggestions from other people, I have found a german radio station that at the time of Apollo received and recorded audio, biomedical telementry and video from the moon.
Someone who came there some years ago said he saw a RCA Quadruplex Video Tape Recorder (VTR) in bad shape, together with a two inch Quadruplex reel on display. The reel was labled Apollo 16. The reel was in a state of decay, as was the recorder.
I have contacted some people at the radio station, and in September I will get in contact with someone who knows more about the tape archive.
So far I know that they recorded video/audio from Apollo 16, and audio from Apollo 11. But I am sure other missions were recorded too, it was hinted.
I proposed a digitization effort, and have been told that the RCA VTR is indeed in a bad state and would need costly repairs. The main reason why it has not been done already, is that NASA had bigger dishes and thus a better video feed anyway. But I think every chance to digitize historically significant tapes should be taken before the tapes have decayed completely.
I will post more information about the tapes as I receive more information. I also asked for photos, but that email has not been answered so far.
Would anyone here be willing to lend their expertise, parts or perhaps an entire Quadruplex machine to a digitization effort? and possible machines for other formats, if the Apollo 11 audio was recorded on 1/4 or 1/2 inch audio reels. NASA has given third parties money for restoration efforts before, like the Lunar Orbiter Image Recovery Project.
If you wish to contact me personally, PM me and ask me for an Email there.
Here is something that an average Quadruplex recorder will look like:

Video heads:

Regards,
Niels