smooreace

What 4.8 volt problem? Its well documented that the AR7000 can easily handle higher voltages

rmh

Dx7 7000 rx-good to 9v - I run over 7 volts on mine (5 cell NiMh or 123, 2 cell)surface voltage is upwards of 7.6 on Nimh- 123 cells are 3.6 v all the time (7.2 pack)
no problems -no regs-
It all gets easier and simpler
thank you

Panzlflyer

My Feedback: (15)

4.8v on larger planes = voltage sag = digital servo lockups and or reciever dropout.

Over 6v and some servos dont like it.

I meant the whole system needs to be revamped, connectors, servos etc, its not been the recievers at fault as even the Futaba and JR offerings are easily capable of handling higher voltage, but non of them like low voltage.

Try running the Spectrum down to around 3.5v and it does weird things and lights start flashing.

smooreace

A voltage regulator is an easy solution, it might be a little too much weight for a small foamie, but on anything else it should be fine

lxcoupe

My Feedback: (34)

I'm the guy that lost the EF Yak. I wasn't even going to post here about it due to the fact that it is almost useless and will not bring back my plane or solve the problem as to why it happened. The plane simply went to idle from a low idle, I was in a inverted elevator at about 75' at a distance of no more then 200' from the plane. At that point i had no response from the plane and just watched it nose down and plant itself. I was running a polyquest 20c 7.4V lipo and a duralite 6v regulated failsafe switch. The battery had just over 8 volts at take off as measured by me. The plane, engine (brillelli 40), throttle servo,and rx (ar7000) were total losses. All the control surface servos (hitec 5945 and 5955)survived somehow. I had over 100 flights on this tx and rx without any problems whatsoever. Don't know what else to say other then I will send the rx back to spectrum with a description of what happened and see what they will do. I'm betting absolutely nothing, I'll be lucky to even hear from them again. (just my experience with stuff like this) Good luck to you guys.
Al

bigbri

My Feedback: (287)

There has been some question about cold weather flying with this radio. I left my plane and Tx in the car last night Temps of about 8 degrees, went flying this am Temp went up to a whopping 14 degrees and had 4 flawless flights. Sooo I would say it handles the cold quite well. I am very please with this radio so far
Brian

Panzlflyer

My Feedback: (15)

ouch, sorry to hear that

BillB

This morning I flew a 6100 on an EFlite Cap232 and a 7000 in an Ultra Stick .40. It was 10 degrees F. I (not being a machine) had to deal with a -10 degree F. wind chill. Both receivers performed flawlessly. The Cap's 1,300 mah battery didn't like the cold and crapped out after about 6 minutes, but the Stick penetrated the cloud layer at 1,700 Ft AGL (above ground level) just fine. Of course it had to come a long way down before I could see it well enough to turn it back upright! (aging eyeballs) Great system!!!!

Ed

Hey Al, sorry about your loss. [] Please keep us informed on what you find.

> Jim

Newc

Same thing - without the lights - will happen to any Rx that is this low on voltage.

On the JR forum Danny Snyder has stated very strongly that the DX-7 syatem is absolutely no different from any other Tx/Rx with regard to low temperature operation. They work fine.

johnnyjet

My Feedback: (4)

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smooreace

I would imaging that an almost identicle statement is in every radios documentation produced in the last many years

johnnyjet

My Feedback: (4)

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Tommy_Gun

Been flying my DX7 in 4 different planes since January 1, 2007.

1) TF F4U with a Saito 1.25, The cam went dry on this engine in the last flight and was making a metal on metal squealing sound, yet NO GLITCHES

2) Skyshark BF109G-6 with a YS 1.10. NO GLITCHES

3) TF FW190D-9 with a YS 1.20. NO GLITCHES

4) Global ME109 with an OS25 FX for club racing. NO GLITCHES and no frequency conflict issues with other racers.

I fly these planes every Saturday at least two times each.

This DX7 is working great for me , even in weather as low as the mid 20's Farenheit.

bsc3D

My Feedback: (3)

anyone had any issues w/the little antenna falling off there AR7000 receivers? This weekend was flying my Ultra-RC Yak and after the last flight I noticed both of the little antenna on the 2nd smaller receiver were gone. It still range checked fine w/out the antenna on there. Have about 12 flights on the Yak and DX7 so far, havent had any issues at all except for the antenna's.

RaceCity

Yep. I had one of the antenna wires begin to fray right where it exits the main rx case. It didn't break, but it was going to.

I think it's important that the insulation on the antenna wire pass THRU the rx case. In this example, the insulation stopped just short of the case, and I suspect lead to the fraying.

I wasn't about to do any surgery on the rx, so Horizon took care of it w/no hassles and a quick turnaround.

In any event, I'd suggest a dab of sealant at the point where the antenna(s) exit the rx case to act as a strain relief.

Aside from that, the radio is working wonderfully. I'm happy with it.

JuanPu

In my case the insulation also stopped just short of the case in two of the antennas, so firstly I shifted them inside.

Then I added to each antenna about 5 mm of thermo-shrunken isolation close to the case, and surrounded them with a small amount of hot glue that has the form of a case-based cone with the wrapped antenna emerging from its apex.

This way I expect to relieve the strain.

RaceCity

Sounds like you nailed it Juan. It's a small caveat for an otherwise outstanding radio.

modifyit15

My Feedback: (27)

Ok here is my Q do I have to worry about a resistor plug when using my DX-7

Capt Jim

My Feedback: (168)

It has been suggested that 2.4 ghz is far above the ignition frequency and is not affected by it at all. Further, it has been speculated that one could actually use the one single battery for both ignition and radio/servo power without incident. That however remains untested, as far as I know.

modifyit15

My Feedback: (27)

that would be great cause in my testing Resisto plugs take more momentum to spark than Standard plugs and you can also use High performance plugs

Geistware

My Feedback: (16)

I would like to caution that while the noise generated by a noisy ignition may not hurt your system on 2.4ghz, the fact that you could potentially crash someone elses plane still exist. Please be considerate of others!

RaceCity

Ignition related RFI is nowhere near the 2.4ghz band.

modifyit15

My Feedback: (27)

OK! not to call you out on this one But if it were to affect someones plane other than mine then I shouldnt start my car with Six non resistor plugs while someone is flying, Everyone at our club has also flown a plane While there were two or more Lawn mowers running Also.

I really doubt that my plane would affect the others at my Field.

in my testing also I have rapped a 72mhz Ant. around my weedeater with out a resistor plug and I got no interference with the ant. retracted on the TX and 30 paces away.

not trying to argue just my 2 pennies I had to throw in, Feel free to object.

anybody Know what Ignition RFI actually is in (mhz)

Geistware

My Feedback: (16)

You may be right.
All I know is that my plane failed a range test when another guy with a G62 started his plane.
I was working on my plane when his went in.
After his crash, I went back to work on my plane and didn't have any ranging problem.
I didn't fly because I had ripped everything out.
It could have been a coincidence.