Primarily for general aviation discussion, but other aviation topics are also welcome.
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By TrailStar
#1460364
Happens all the time (have different radio, -trig), almost as bad as traffic calls to membury on safetycom, which is somehow readable from almost anywhere south of birmingham with a decent modern coms setup.
I suppose frequency allocations were originaily setup and tested with them certified, king/garmin/narco state of the fart rubbish in the 1830's or summat.
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By neilmurg
#1460378
I have a 750 as a backup and also gives me 8.33 while the aircraft doesn't.. As others have said, I got the 750 as the incremental cost is small, I don't intend to use the nav/glideslope (I don't think it's safe/appropriate-'please check me out for an ILS app. using an FTA-750' :shock:)
It works great for me, chiefly as a 'call for startup' option without booting up the aircraft, and because I'm OCD and like backup/toys [the definition of a PPL pilot?]
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By JWL
#1460915
neilmurg wrote:I have a 750 as a backup and also gives me 8.33 while the aircraft doesn't.. As others have said, I got the 750 as the incremental cost is small, I don't intend to use the nav/glideslope (I don't think it's safe/appropriate-'please check me out for an ILS app. using an FTA-750' :shock:)
It works great for me, chiefly as a 'call for startup' option without booting up the aircraft, and because I'm OCD and like backup/toys [the definition of a PPL pilot?]


I have a 750 for pretty much the same reasons, mainly as a back up than anything else.
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By seanjd
#1470764
I had a play with the Nav settings today, and tracked to a VOR. It worked fine but display is small and you need the radio in a position so you can see the screen well to be useful.
It was a bit intermittent at about 12Nm but consistent from about 10Nm. Nice to know it works and there if needed though.
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By rf3flyer
#1527122
Bumping an old thread here.

My old Delcom handheld has developed a mechanical switching fault so I'm looking at the Yaesu FTA-550L as a lowest cost replacement. I want to use it in the air with a headset and a remote PTT switch, single place, no intercom.

The manual has this diagram indicating that a PTT switch can be used, presumably between the headset mic jack and the headset adaptor socket, but gives no other detail.
Image
I know remote PTT switches can be bought and velcro'd in place but thats a lot of curly wire, jacks and sockets in a small cockpit. Also, the last one I had eventually fell apart. So, would a simple, single pole, momentary switch work OK or would more electronic complication be necessary? Can anyone provide a diagram for home building a remote PTT switch?
By ChrisRowland
#1527139
The PTT signal on the 3.5mm plug should connect to the tip on the microphone socket. Transmit is when that is shorted to ground.

This http://www.aeroelectric.com/articles/mi ... cjack.html shows the connections.

I would be tempted to find a 4 connector 3.5mm plug and fit wiring in the aircraft with headphone and microphone sockets and a PTT switch fitted to the stick. Then you only have to connect the radio and headset to the permanent wiring.
By pilotea
#1527147
dmarti32 wrote:Thing its time to get a new handheld radio.

Does anyone have any experience of the FTA550?

TIA

Dave

I've got the 750, takes a bit of time to get used to the interface, but as always with Yaesu, good quality unit.
By Jetblu
#1527157
Blimey, everyone seems to singing praises for the Yaesu transceiver.

My faithful 20 year old Icom A20 needs replacing with compliant gear so I'm in the market for a 750. Where's poor Sooty when you need him :D
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By rf3flyer
#1527221
ChrisRowland wrote:The PTT signal on the 3.5mm plug should connect to the tip on the microphone socket. Transmit is when that is shorted to ground.

This http://www.aeroelectric.com/articles/mi ... cjack.html shows the connections.

You'll have to make allowances for my lack of understanding but I'm not sure that's quite the same. The diagram I posted from the manual has the PTT on the first ring behind the tip whereas aeroelectric.com has nothing on that ring.
ChrisRowland wrote:I would be tempted to find a 4 connector 3.5mm plug and fit wiring in the aircraft with headphone and microphone sockets and a PTT switch fitted to the stick. Then you only have to connect the radio and headset to the permanent wiring.

That's my goal, I just need to understand how to get there.
tomshep wrote:I found it easy to find a four pole jack and plug to make an adaptor. Easier than soldering same!

Do you have a diagram of what you did that you would be prepared to share?

The reason I'm asking this is that when my old Delcom PTT switch fell apart I found electronic thingies inside. I traced the circuit and replicated what I had found using Veroboard. Even the switch itself had a capacitor across terminals. My breadboard worked fine for a decade and a half tucked inside the cradle that held the radio yet I have no idea what all the bits did but presumably disaster might have been mine had I just used a momentary switch on it's own. I don't want to risk frying a new radio by treating it like a house light switch and nor do I really want one of these velcro and curly wire PTT buttons that I see on Transair and similar.

I feel certain someone has done this successfully. I'd just like to pick his or her brains.
By Crash one
#1527236
I got Harry Mendelsohn to wire the Yaesu plug onto a two place intercom. The intercom is fitted into the panel, with a clip to remove it and change batteries. I then wired from the back of the PTT socket on the intercom through a hole in the case to the original PTT switch on the stick.
The Yaesu clips into an aluminium block screwed to the panel.
Cig socket behind the panel through a 2amp CB for power.
Wires all pass through a grommet close to the radio, quite tidy.
The PTT switch/socket in the intercom is just a straight make/break thing. Tested by holding the wires together.
Permit aircraft.
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