On Mon, 24 May 2004 14:49:07 -0400, Dave Hall wrote:

Superfluous on CB. Especially on AM, where a very distinct carrier
dropping, signals the end of transmission.

nonsense,roger beeps or actually nasa beeps were used on the apollo missions.
after the moon missions is when they started catching on with cb'ers. apollo
used am radios. was nasa using the beep as a sound effect to entertain us?

In ,
(Snotgeorge) wrote:

On Mon, 24 May 2004 14:49:07 -0400, Dave Hall wrote:

Superfluous on CB. Especially on AM, where a very distinct carrier
dropping, signals the end of transmission.


It's not always easy to tell in a noisy truck with the squelch up. I
can understand where is could be useful.


nonsense,roger beeps or actually nasa beeps were used on the apollo missions.


Those were Quindar tones.


after the moon missions is when they started catching on with cb'ers. apollo
used am radios.


Are you sure about that? I thought they used NBFM as far back as the
Mercury program, but I could be mistaken.


was nasa using the beep as a sound effect to entertain us?


Ever see Capricorn One?





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On Thu, 03 Jun 2004 00:26:55 -0700, Frank Gilliland
wrote:

Are you sure about that? I thought they used NBFM as far back as the
Mercury program, but I could be mistaken.


yes,they were am, 3 watts if i remember correctly. thats why you never heard a
squelch tail.

Ever see Capricorn One?

yes, i have it on dvd. the moon missions weren't faked.

In ,
(Snotgeorge) wrote:

On Thu, 03 Jun 2004 00:26:55 -0700, Frank Gilliland
wrote:

Are you sure about that? I thought they used NBFM as far back as the
Mercury program, but I could be mistaken.


yes,they were am, 3 watts if i remember correctly.


http://www.svengrahn.pp.se/trackind/...7/APOLLO17.htm


thats why you never heard a
squelch tail.


Maybe you missed the part about Quindar tones:

http://www.hq.nasa.gov/office/pao/Hi...j/quindar.html


Ever see Capricorn One?

yes, i have it on dvd. the moon missions weren't faked.


No, but the movie was good entertainment, complete with roger-beeps!
"Marooned" was pretty good, too. I didn't like "Apollo 13" as much as
I thought I would -- computer animation has come a long way, but it
still looks fake when compared to the special effects that were
state-of-the-art just before computers took over the scene. Damn
accountants!






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On Thu, 03 Jun 2004 05:10:33 -0700, Frank Gilliland
wrote:
Maybe you missed the part about Quindar tones:


yes i did sorry. quindar tones were only used on the uplink, not the downlink.
i still think if the downlink were fm that you would here the squelch tail when
the downlink unkeyed. ?

No, but the movie was good entertainment, complete with roger-beeps!
"Marooned" was pretty good, too. I didn't like "Apollo 13" as much as
I thought I would -- computer animation has come a long way, but it
still looks fake when compared to the special effects that were
state-of-the-art just before computers took over the scene. Damn
accountants!

very true. i think the hbo series about apollo was better than the movie

On Thu, 03 Jun 2004 00:26:55 -0700, Frank Gilliland
wrote:
Are you sure about that? I thought they used NBFM as far back as the
Mercury program, but I could be mistaken.

Frank,here are the frequencies used during the apollo missions

227.5 - AM - Apollo 6
230.9 - AM - Apollo 5
237.8 - AM - Apollo 5 / 6
241.5 - AM - Apollo 5
247.3 - AM - Apollo 5
257.3 - AM - Apollo 5
259.7 - AM - Space Shuttle Primary / Apollo 7 - 12
296.8 - AM - Space Shuttle Backup / Apollo 7 - 12

In ,
(Snotgeorge) wrote:

On Thu, 03 Jun 2004 00:26:55 -0700, Frank Gilliland
wrote:
Are you sure about that? I thought they used NBFM as far back as the
Mercury program, but I could be mistaken.

Frank,here are the frequencies used during the apollo missions

227.5 - AM - Apollo 6
230.9 - AM - Apollo 5
237.8 - AM - Apollo 5 / 6
241.5 - AM - Apollo 5
247.3 - AM - Apollo 5
257.3 - AM - Apollo 5
259.7 - AM - Space Shuttle Primary / Apollo 7 - 12
296.8 - AM - Space Shuttle Backup / Apollo 7 - 12


Cool! Are these the uplink or downlink carriers? Where did you find
this stuff?





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In ,
(Snotgeorge) wrote:

On Thu, 03 Jun 2004 05:10:33 -0700, Frank Gilliland
wrote:
Maybe you missed the part about Quindar tones:


yes i did sorry. quindar tones were only used on the uplink, not the downlink.
i still think if the downlink were fm that you would here the squelch tail when
the downlink unkeyed. ?


That's because there was no squelch. Audio was phase-modulated onto a
subcarrier of the uplink/downlink carriers, and both were continuious
transmissions. The Quindar tones were used to flip between the mod and
demod circuits. I would assume that full duplex audio was possible but
wasn't used in order to save weight, power and bandwidth.


No, but the movie was good entertainment, complete with roger-beeps!
"Marooned" was pretty good, too. I didn't like "Apollo 13" as much as
I thought I would -- computer animation has come a long way, but it
still looks fake when compared to the special effects that were
state-of-the-art just before computers took over the scene. Damn
accountants!

very true. i think the hbo series about apollo was better than the movie


I haven't seen that yet, but I'll watch the schedule to see if it's on
again.





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