Date: Mon, 20 Jul 2009 22:52:08 -0800 To: "STeve Andre'" [email protected], [email protected] From: Edward Cole [email protected] Subject: Re: [amsat-bb] Re: Evidence of moon landings....!
LeRoy,
I'm not sure how you can have a source other than NASA, other than two hams who made independant recordings of Apollo transmissions. In 1971 (summer issue) a QST article talks of Dick Knadle(sp?) KRIW who got some, and another ham, I believe W4HHK received signals as well. ------snip
Steve you can add my witness of the Lunar orbiter signal on S-band received on a ten foot comm dish that my supervisor with JPL set up in his yard using a diode mixer and a microwave signal generator for LO. The signal exhibited expected Doppler shift and every 20-minutes or so it dropped out (occulted by the Moon as the orbiter orbited behind). This was not Apollo-11 but one of the other missions afterward, to memory (long time ago - 1971). We both worked at Goldstone tracking facility back then. We only detected the carrier since the dish was insufficient size for recovering the modulated signal.
73, Ed - KL7UW (then K8MWA/K6)
Ed, I completely forgot to discuss the reception of the Lunar orbiter. Yes, we used an old TS-408/U (military version of a hp 608A signal generator) a polaplexer, and Bill Burns 8-foot trailer mounted dish. We got good S/N ratio on the carrier, but couldn't recover information from the sidebands. If I remember correctly, the downlink was about 2287 MHz. The downlink/uplink ratio was 240/221, Milt Brockman's ratio we used in the DSN since the L-band days. 73, Dick K6HIJ
So there you have it.
73, Ed - KL7UW