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RF Cascade Workbook 2005 - RF Cafe
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About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2016
Webmaster:
Kirt Blattenberger,
 BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:
 AirplanesAndRockets.com

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Apollo 11 Long Distance Phone Call
Videos for Engineers

Nixon Phone Call to Apollo 11 - RF Cafe Cool Video"Can you hear me now?" is a trademark question brilliantly conceived of by Verizon and repeated ad nauseam by its geeky repair guy in TV commercials. 30 years earlier, NASA outdid them big-time. On July 20, 1969, the as yet unbroken long distance phone call record was set by President Nixon from the Oval Office. Per the president's daily diary, "The President held an interplanetary conversation with Apollo 11 Astronauts, Neil Armstrong and Edwin Aldrin on the Moon." Get that? Interplanetary! I am not sure where the moon was in relation to the Oval Office, but the distance could have been anywhere from about 226 kmiles to 257 kmiles. If you listen closely, you can hear the 2.5-second echo caused by the round-trip radio First Ever "Can You Hear Me Now?" Commercial - RF Cafe Cool Videosignal propagation time (note "to join" at 1:18, then echo at 1:20). Do not be tempted, as some commenters on the video did, to claim the Moon call does not count because a radio was required between the desk phone and Eagle (re-designated Tranquility Base while on the surface); that is how your cellphone works. From the Oval Office to Tranquility Base - what an accomplishment! The only way to beat that record would be to send a human out beyond the orbit of the moon, which is not going to happen for a long, long time... unless China decides to do so.



Longest Distance Phone Call Ever Made - From the Oval Office to the Moon



Very First Verizon Advertisement with the "Can You Hear Me Now?" Guy

Videos for Engineers - RF CafeThis collection of video and a few audio files represents files that have been featured on the RF Cafe homepage. Every week or so a new file is added that should be of interest to RF Cafe visitors.

All Videos for Engineers archive pages:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 16 | 17 | 18 |19 | 20 | 21 | 22 | 23 | 24 | 25 |

Please send me an e-mail if you have a good subject. Note: "Videos for Engineers" formerly went by the name "Cool Videos."

Videos for Engineers - RF CafeThis collection of video and a few audio files represents files that have been featured on the RF Cafe homepage. Every week or so a new file is added that should be of interest to RF Cafe visitors.

All Videos for Engineers archive pages:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 16 | 17 | 18 |19 | 20 | 21 | 22 | 23 | 24 | 25 |

Please send me an e-mail if you have a good subject. Note: "Videos for Engineers" formerly went by the name "Cool Videos."



Posted August 2, 2011