SPACE SHUTTLE

[rEdf196]

Another reason aircraft use AM is that to convert to FM or P25 for that matter is that it would be very expensive to convert all aircraft to a different modulation mode sine AM has been the primary mode since the second world war. A time when AM was the pimary mode on VHF.Unlike the RCMP which are presently trasitioning to an encrypted [sic]P25 mode there has never been a need for aircraft to upgrade their communication system.

[QuincyCHL]

On HAM radio band they use FM because almost nobody have 2 meters band equipment with AM. And have to correct the doppler effect manualy.

But the main reason to use AM on aircraft band on VHF or UHF is reduce the distortion produce of dooppler effect.

[uploadJ]

@QuincyCHL "But the main reason to use AM on aircraft band on VHF or UHF is reduce the distortion produce of dooppler [sic] effect."

Negative. It is to avoid the inherent 'capture' effect FM has on a stronger signal over a weaker signal. With AM, there is no 'capture' effect and both comms will be heard (although the weak one will still be weak, but still there using AM).

Look it up, don't take my word for it!!!!!!

.

[doodyguy1]

VERY IMPRESSIVE!

[Moreoff]

Cool to hear it just before the actual NASA retransmission in the background.

[GoldhunterUK]

What antenna did you use please? Did you have a tuner in line? Thanks.

[fatbill911]

RADIO FANS SUBSCRIBE 2 ME!!

[233EC052]

lol, maybe when you'll grow up a little more.... :))

[ZZZTESTZZZ]

Wow awesome. I got a radio that will go to this freq. I'm standing by listening.

[sz42781]

I bullshitted with the space shuttle a few times, pretty exciting the first time

[ei4dib]

Have you heard the ISS or the old MIR when it was up??

[FREEFALCAO]

pode escrever aqui o que eles dizem?. Assim posso traduzir.

[apolloscam]

Have you ever watched the shuttle fly over East TN? Takes about 20 seconds. Hurtlin hunk o metal n plastic.

[Gudtime]

I am Amazed they use AM! With All Nasa's Technology and All.. But I guess the Airlines still do as well.. As N8UUP says.. Neat Stuff Indeed!.. Congrats.. VE6CPP

[QuincyCHL]

They use AM to reduce distortion produced by doppler effect. All air band comunications use AM.

[w9x7cv3vg6]

@QuincyCHL negative there old trout! they use 144.900 and others in the ham band when talkin to our guys on FM and we all use the doppler effect to match up with them as they come towards and go away from our stations

[N8UUP]

Neat Stuff!

[py2el]

What a nice space shuttle signals reception.Congratulations.

73,

PY2EL, VA3PWC