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HomeAircraftHelicopterAerial Photography and Video › Speaking Altimeter for solo AP
02-08-2008 08:45 PM  10 years agoPost 21
G0KPE

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Newbury, Berks - UK

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Hello Dave (MPA),

Thanks for your interest.

My speaking altimeter has a resolution of 1 metre (or 3feet). It may well be suitable for your application but if I understand correctly, you market a pole camera mount, why would you need an altimeter for a polemount? Can you please give me more details of your application?

Best wishes
Carl

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02-08-2008 08:53 PM  10 years agoPost 22
G0KPE

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Newbury, Berks - UK

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You might consider relative announcements with bench marks.
Hello Acebird,

What you have described is an interesting idea and certainly something that could become a firmware option in the future. It would not involve extra circuitry just different software coding. I have deliberately built in to my design an easy end-user update facility for ideas like this.

Thank you for your idea.

Best wishes
Carl

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02-08-2008 09:08 PM  10 years agoPost 23
G0KPE

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Newbury, Berks - UK

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Hello Acebird,

Forgot to mention that the US equivalent of the European PMR446 licence-exempt walkie-talkie radios is the Family radio service (FRS) which has 7 channels around 467MHz.

Rgds
Carl

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02-08-2008 09:17 PM  10 years agoPost 24
AceBird

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Utica, NY USA

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They use a tone that increases in frequency when going up or decreasing in frequency when going down.
Believe it or not this still will consume brain power differentiating the direction, not as much as calling the numbers but more than saying up when it’s going up and down when it’s going down. The faster you understand the message the quicker you can make an adjustment. Actually, the shorter the message the better. The word “up” and the word “down” all by themselves will be the quickest to recognize, even it is your wife yelling at you. For those of you that are using teams with a headset try shortening the messages and see if it doesn’t help.

Ace
What could be more fun?

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02-08-2008 09:19 PM  10 years agoPost 25
AceBird

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Utica, NY USA

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No need to thank me Carl that is what this forum is for. It's all about sharing.

Ace
What could be more fun?

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02-08-2008 09:25 PM  10 years agoPost 26
wjw

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Cape Coral, Florida usa

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I think I would prefer the lighter version that could be patched in to my existing 2.4G transmitters.

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02-08-2008 09:25 PM  10 years agoPost 27
AceBird

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Utica, NY USA

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Family radio service (FRS) which has 7 channels around 467MHz.
How viable is this for video down link. I know walkie talkies can be pretty powerful. I would love to down link HD video to a ground station and skip the storage hardware on the heli. Is it possible?

Ace
What could be more fun?

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02-08-2008 09:36 PM  10 years agoPost 28
Highviz

rrApprentice

Newbury, Berks, UK

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If you had a choice of the self-contained unit with the built-in transmitter and PP3 battery or a lighter version without the built-in transmitter and battery but with an audio output cable to plug into your existing 2.4GHz/900MHz downlink, which do you think you would go for?
Hi Carl - My vote would be for the lighter version using the existing audio on the downlink. It's already there and not normally used, so might as well save the weight. Same goes for the battery - I've already got too many to charge

Are you around tomorrow for a demo ?

Malcolm

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02-08-2008 11:23 PM  10 years agoPost 29
MPA

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Australia

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Hi Carl

In short "Balcony shots" for property photography, which is the sole work done by those who buy my pole rigs.
To the nearest metre is fine with them to date wehn ive discussed it with owners.
(currently 30 owners of them Aus wide and a few exported)

Id prefer a unit that simply announced altitude only if possible.
I'd use a servo channel or comm line to turn it on or off.
Or maybe just leave it on.

A/V from the video Rx is captured on the laptop so I can turn sound on and off in the software.

I already have a battery indicator on the controller software.

And calibration on power up would suit my needs, don't need to store values.

Let us know if you have any idea about rough cost of, and when you are expecting to do some..
Ill buy a unit to trial to start with.

Dave

rvv.com.au

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02-08-2008 11:28 PM  10 years agoPost 30
G0KPE

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Newbury, Berks - UK

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Hello Ace,

I'm afraid that FRS radios and PMR446 radios are narrowband FM devices suitable only for telephone quality speech.

Transmitting HDTV video over radio requires a huge bandwidth (20MHz)on radio frequencies in the microwave region. It uses complex and very expensive modulation and demodulation techniques (COFDM). This kit and the radio licences to operate it are the preserve of wealthy broadcasters, law enforcement and military users.

Unfortunately it will be a long time before real-time HDTV linking is within the reach of hobbyists like ourselves.

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02-08-2008 11:36 PM  10 years agoPost 31
G0KPE

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Newbury, Berks - UK

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Highviz

Hello Malcolm,

Yes tomorrow could be good. I think the weather looks settled.
Give me a phone call in the morning between 8:30 and 9:30am if you can.

So far, feedback indicates that most people would use their existing video downlinks with that spare audio input just calling out to be used.

I am going to get some friends who fly hot air balloons to try the self contained unit. They have a Land Rover 'following vehicle' carrying family and friends of the people in the basket. It might be interesting to hear in the vehicle what height your relatives and friends are at

Rgds
Carl

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02-09-2008 12:18 AM  10 years agoPost 32
AceBird

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Utica, NY USA

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Unfortunately it will be a long time before real-time HDTV linking is within the reach of hobbyists like ourselves.
Thanks Carl for making that clear. I don't understand radio theory. so I am left with the problem of recording the capture of video on the heli.

Ace
What could be more fun?

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02-09-2008 02:06 PM  10 years agoPost 33
cmartin

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Kouts IN

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Is it possible to run this unit on a constant 12V power?

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02-09-2008 02:27 PM  10 years agoPost 34
AceBird

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Utica, NY USA

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Unfortunately it will be a long time before real-time HDTV linking is within the reach of hobbyists like ourselves.
What can you push through a glass fiber say 300 feet long?

Ace
What could be more fun?

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02-09-2008 05:26 PM  10 years agoPost 35
monterey_tip

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Monterey, Ca - USA

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Hi Carl,
Looks very promising for many APers. Any idea on price? Rough ballpark guess?

Thanks,
Tip

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02-09-2008 08:14 PM  10 years agoPost 36
G0KPE

rrNovice

Newbury, Berks - UK

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Hello Cmartin,

Yes it can run on a constant 12V supply. It will just get slightly warmer as the extra voltage is dissipated as heat.

Rgds
Carl

PM sent to Monterey

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02-09-2008 09:45 PM  10 years agoPost 37
BigguyOz

rrKey Veteran

Forster, New South Wales, Australia

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"What can you push through a glass fiber say 300 feet long?"

Brilliant idea! Now if you calibrate that fibre optic, you don't even need any electronics up there, AND you can use it as a tether as well! (sheesh)

Tony Stott

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02-09-2008 11:42 PM  10 years agoPost 38
AceBird

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Utica, NY USA

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AND you can use it as a tether as well! (sheesh)
Not strong enough. But I wouldn't expect you to know that.

Ace
What could be more fun?

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02-10-2008 11:23 AM  10 years agoPost 39
BigguyOz

rrKey Veteran

Forster, New South Wales, Australia

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Woooosh! That was the sound of irony flying past your head Gyro.

Tony Stott

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02-10-2008 03:42 PM  10 years agoPost 40
monterey_tip

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Monterey, Ca - USA

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Wait Tony...so you guys are saying it won't work??? Darn, I already placed my order for a truck sized spool!

Tip

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HomeAircraftHelicopterAerial Photography and Video › Speaking Altimeter for solo AP
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