OT: Moon Landing

[Clifford Heath]

On 24/7/19 8:36 pm, Jan Panteltje wrote:

On a sunny day (Wed, 24 Jul 2019 18:22:13 +1000) it happened Clifford Heath
no.spam@please.net> wrote in <YyUZE.213601$5i.93589@fx46.iad>:

On 24/7/19 5:13 pm, Jan Panteltje wrote:
On a sunny day (Wed, 24 Jul 2019 14:28:46 +1000) it happened Clifford Heath
no.spam@please.net> wrote in <28RZE.67375$qC7.18222@fx11.iad>:
"Bill had an engineering career at Goldstone - Manned Flight and Deep
Space. A very competent engineer - I knew him well. He’s been to other
reunions, but couldn’t make this cos of medical problems. He’s written
the best essay on Apollo and TV:
https://www.hq.nasa.gov/alsj/ApolloTV-Acrobat5.pdf"
Thank you very much for that paper.
Brings back the amazing old days.

Strange they made that gamma correction error,
probably when scientists do not understand video.

I also clearly remember that problem with that camera pointed at the sun and it no longer working.

That was a Westinghouse colour camera that Alan Bean pointed at the sun
while mounting it on the tripod. Not the B&W mono camera from RCA that
went with A11. But I guess you knew that.

From what I remeber we (I ?) thought the color wheel was burned,
but it now seems the tube target electrode was damaged.

Only half the area was damaged, and it saturated the AGC.
On returning it to earth, simply clipping the AGC wire made (half of) it
work again.

Vidicons were (was it a vidicon?) very sensitive to burn in.
.....> Better stop here.

Amazing stuff, thanks.