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Old 01-15-2007 | 12:04 AM
  #1026  
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Default RE: Spektrum DX-7

If you zip back to early pages on this thread - both fixes are explained -take a look
Basically you did not INH all switches on first screen for flap /trim aux2/trim
and in your favor the book really should have started with that -in my book
that trips up more people than any one thing.
Now completely clear a model and start over do NOT try to "fix " the model you are on - cancel to default by following the "CLEAR " instructions in the book -then proceed
Old 01-15-2007 | 07:17 AM
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Default RE: Spektrum DX-7

Another discovery - one that I didn't see mentioned anywhere... Using any of the mixers, 1 - 6, to mix RUDD > ELEV for pitching....the mixes DO permit control in EITHER direction, and the master is fed to BOTH channels of the SLAVE (if dual channels used there, like the Dual Elevators or Flaperons (dual ailerons)). Just a "nice to know" item to have tested before it was needed.

If knife edge mixing is needed, this will do it with a single mix for each axis, RUDD > ELEV, and RUDD > AIL. Handy to know, maybe, for those who use these.
Old 01-15-2007 | 09:51 AM
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Default RE: Spektrum DX-7

a1pc,
RCU always has some quizzes running. Look under RC Community. DX7 is the latest quiz running.

http://www.rcuniverse.com/university/quizlist.cfm

Horizon is offering a free DX7 to the winner. Post your result, mine was 9 out of 10
Jimnie
Old 01-15-2007 | 11:00 AM
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Default RE: Spektrum DX-7

Me too, same score. Too bad that guys that already own and have used these are playing too [:'(]. JMHO, not that of the management .
Old 01-15-2007 | 11:04 AM
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Default RE: Spektrum DX-7

I missed three, because I have ALWAYS had problems with "RTFQ" and "RTFA" when taking tests.....
Good quiz, though.... fun!
Old 01-15-2007 | 11:08 AM
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Default RE: Spektrum DX-7

Bob - the INCLUDED mixes for roll couple or pitch couple work nicely as you noted
Did you also note that you can use a flap switch position to engage either?
I set mine to fix a wee bit of roll on the Bling (switch in 0 position)
the Kooool part is that when landing -for engine shutoff -the same switch flipped to 2 position is engine cut.
center position is neither activation and even if yo flip the switch whilst flying -no harm done
Whata nice little radio!!
want another 10x? cheep?
I missed three of the quiz from speed reading - the antenna wire and a couple of other dufus ones .
But so far I can't see me needing a radio which does more than this one
If I want smoke - I will just set the durn thing on fire --
Old 01-15-2007 | 11:14 AM
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Default RE: Spektrum DX-7

Yep. Also, those readers here who "think" / "thought" the JR 7202 manual would shed any light on this radio......... NOT!!!!! Identically, and equally-poorly written.

I am still just amazed at the capability in our hands for $300...... WAY back in the dark ages of the Kraft 5 ch "Sport", that thing was over $500 and didn't do honkus except get grit in the ball gimbals, and wear the mechanical bails hooked to the pots.

Boys 'n girlz, we have come a LOOOONG way....
Old 01-15-2007 | 11:35 AM
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Default RE: Spektrum DX-7

Dick and Aerobob,
With the experience that you guys have plus some others on this forum, could I make a suggestion?

Due to the shortcomings in the manual and some of us being new, what do you guys think about collaborating on a shortcut manual of sorts? Such things that you guys have discovered that can be printed out in a single format of several pages.

My LHS dealer has a DX7 in transit that is supposed to be in tomorrow. If you can believe this, he actually is trying to steer me clear of the DX7 and into a 9303. He has one going back for service and tells me that unless you use the supplied charger, the fuse will short out in the TX and that I can not use my Elite to charge the batteries.

I for one trust the level of the experience that you guys have and would appreciate your thoughts before I say yea or nay and plunk down my cash .

BTW Bob, my bud Joe bought your 10X I'm waiting on his input on that also before I decide.
Old 01-15-2007 | 11:39 AM
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Default RE: Spektrum DX-7

Not true. You can use any charger that works with your JR. The DX-7 like JR radios is center pole neg.
Old 01-15-2007 | 11:41 AM
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Default RE: Spektrum DX-7

If I were a dealer, I'd try to steer you into a $300 more expensive radio, too! You can use other chargers with the DX7, I use my Triton, and it works fine. The radio has no idea what is plugged into it, the supplied charger or something that is good.
Old 01-15-2007 | 11:47 AM
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Default RE: Spektrum DX-7

Now now - I use my little wall thingy exclusively
I can't stand to fly six hours in a given day so the current (rimshot) setup is really not an issue . Plus - it makes the batteries all nice and happy.
Another thing --
When I setup all the mix n stir stepups on my DX7-- I just switch back n forth to the servo curser page to see if it is all working as intended
Then switch on the model and proove it out .
Next model I will setup is my H9 33%-9% EDGE (the GODZDZILLA). So far I have only tried three planes- Bling, CAP and a Seniorita . Following the the EXTRA- a 42% Radiocraft. I see no problems at all.
Old 01-15-2007 | 12:34 PM
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Default RE: Spektrum DX-7


ORIGINAL: olstoney

My LHS dealer has a DX7 in transit that is supposed to be in tomorrow. If you can believe this, he actually is trying to steer me clear of the DX7 and into a 9303. He has one going back for service and tells me that unless you use the supplied charger, the fuse will short out in the TX and that I can not use my Elite to charge the batteries.


BTW Bob, my bud Joe bought your 10X I'm waiting on his input on that also before I decide.

The "stock charger" will not do ANYTHING harmful to the DX 7. Your LHS is incorrect in that, and I believe is incorrect in steering you to the 9303, UNLESS you need the bells and whistle extras of the 9303 (or 10X) over the DX 7. So far, I'm not missing functionality of the 10X because I no longer "compete". (And probably did NOT need all the crap when I did compete, but was brainwashed into believing it was so. When I finally DID stop - I was using my 10X just like the DX 7. Wasn't using ANYTHING that the DX 7 can't do.)

I hope Joe likes the 10X - he got a great value in that purchase, I assure you!!!!
Old 01-15-2007 | 12:38 PM
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Default RE: Spektrum DX-7

Hi Guys, I have a Jr 10x radio and I fly my giles 202 45% with it.I am currently non flying the model coz at the back of my mind allways there is the risk of somebody by mistake may switch on you ,beginners mostly. What do you suggest ?I go dx7 or xtremepowersystems. What do you reccomend. I want to fly with a peace of mind as possible and I need your experience for this help pls.
Old 01-15-2007 | 01:07 PM
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Default RE: Spektrum DX-7

Well, at this point, XPS doesn't exist, so the only choice is DX7. However, assuming that in 4-6 weeks he doesn't have another 4-6 week delay (we've got to be on the 4th or 5th one of those), then it's your call. Here's what I did, I have a 9zWC that I love, and I decided to go to the DX7, with the knowledge that I'll pick up a DX9 whenever it comes out. There's a couple reasons for this decision.

1. XPS doesn't give me a good feeling. I dunno what it is, but there's something about the product, the statements by the owner of XPS, and his rep that makes it hard for me to trust my 35% 100cc Edge to. XPS is just too small, and entirely too unproven for me. There's a lot of security in knowing that Spektrum is a Horizon venture with JR components. They will be around, with parts and support for the long term.

2. With XPS, I'm still using a 7 year old radio, just with a new module. Things fail, and when they do, who's taking responsibility? Futaba will say it's XPS, XPS will blame Futaba, and no one will care that I'm out a $5000 plane because of some hiccup.

3. The DX7 receivers are SWEET. They don't have any of the ceramic filters and things that we have on 72mhz receivers, just a single board, so they are small, light, and vibration resistant. In addition, they can handle up to 9v, and 30amps, so they will take an unregulated 2s lithium.

4. The response time on the DX7 is the fastest thing out there. They group functions together and transmit them at the same time so everything moves smoothly, it is a true digital link from your transmitter up to the plane, since they have gotten rid of all the PPM componentry inside. The XPS will be taking a PPM signal from your TX and shooting it out. It may end up being slightly faster than your transmitter before, but it won't be as fast as the true digital link the DX7 gives you.

The downside of the DX7 is that it is lacking in features, the big one for me is the lack of switch assignability, and with the DX7 I do not have enough channels to run my smoke system in the Edge unless I program some servos or use some electronic trickery. For me, the benefits of never getting shot down, never having glitches, and the NOTICEABLY better response of the Spektrum system outweigh those downsides. I will be buying a DX9 when it comes out, and keeping the DX7 as a backup, since I like to always have a backup transmitter because you never know when you are going to drop one or something weird is going to happen. If you figure out the pricing, you can sell the servos and battery for around $100, the receiver is worth $100, so you are really only paying $150 to have an extra transmitter and have the peace of mind of the DX7 now. That's an acceptable cost to me, and a downright bargain.

What I am doing for now is I've set the DX7 up in a few of my planes, one of which is a 27% Cap232. In the Cap, I'm running dual AR7000s, one running each side of the plane, with dual packs and switches, exactly like I will do in my 35% Edge. If the Cap has no issues after a couple of months, I'll pull the receivers out and transplant them, and put the Cap back to a singe receiver. Then I'll have proven the reliability in a much less expensive setup before committing the big bird to it. Until then, I'm continuing to fly the Edge on my 9zWC, but by the time spring/summer rolls around, I expect it to be flying on the DX7 as well.
Old 01-15-2007 | 01:23 PM
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Default RE: Spektrum DX-7

Hi Guys, Been reading this thread a bit and thought I'd share a little info with you.

First on the low temp issue. Not sure how the message got confused here, but the info about only using DX-7 dpwn to freezing is incorrect. It will work fine at low temps, the same as any other RC system, there is nothing unique about DX-7 in this regard. We'll get our PS staff informed on that.

On set-up of models with 2 ail and 2 elev servos, I'd like to share the proper and fastest way to do this.

First, the rx connections:

1. right side elevator into ELEV channel
2. Left Side elevator into AUX 2 channel
3. Right Side aileron into AIL channel
4. Left side aileron into FLAP (AUX 1) channel
5. Rudder and Throttle into the normal channels

TX program

1. Go into the Set-up mode (hold down scroll and select keys while turning on tx)
2. scroll to the Input Select screen
3. Set Aux2 to INH, AUX2 TRIM to INH, FLAP to INH, FLAP TRIM to INH
This turns off both of these channels from the levers and switches. This is the proper way to do this, not using P-mixes or Travel adjust.
4. Scroll to Wing Type
5. Activate Flapperon

Elevator Set up
1. Power off tx and turn back on. Go to normal programming mode
2. Scroll to P-mix 6. Set ELEV as master and AUX2 as slave.
3. Scroll to Sub Trim and set the neutral for the right side elevator with ELEV channel and the neutral for the left side elevator with AUX2.
4. Scroll to Travel Adjust. Set the desired travel for the right side elevator with the ELEV adjustment.
5. Scroll back to P-Mix 6 and tweak the travel of the left side elevator to match the right side with the mix values, for each stick direction.

Aileron Set-up
1. Go to normal programming mode
2. Scroll to Sub Trim and set the neutral for the right side aileron with AILE channel and the neutral for the left side aileron with FLAP channel.
3. Scroll to Travel Adjust. Set the desired travel for the right side aileron with the AILE adjustment.
4. Set the travel of the left side aileron to match the right in both stick directions with the FLAP channel in Travel Adjust.

From here forward everything will work as if the elevator and ailerons were off of one channel. i.e. DR, expo, p-mixing for pitch or roll coupling.


Hope this helps.
Old 01-15-2007 | 01:30 PM
  #1041  
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Default RE: Spektrum DX-7

Great info, Mike, BUT --- the Elevator "Dual" setup needs to use MIX 5 or 6, as those are the only two that "master" trim lever changes into the slave. Other than that, I think your procedure will help lots of folks! Well done.
Old 01-15-2007 | 01:34 PM
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Default RE: Spektrum DX-7


ORIGINAL: ncrego

Well, at this point, XPS doesn't exist, so the only choice is DX7. However, assuming that in 4-6 weeks he doesn't have another 4-6 week delay (we've got to be on the 4th or 5th one of those), then it's your call. Here's what I did, I have a 9zWC that I love, and I decided to go to the DX7, with the knowledge that I'll pick up a DX9 whenever it comes out. There's a couple reasons for this decision.

1. XPS doesn't give me a good feeling. I dunno what it is, but there's something about the product, the statements by the owner of XPS, and his rep that makes it hard for me to trust my 35% 100cc Edge to. XPS is just too small, and entirely too unproven for me. There's a lot of security in knowing that Spektrum is a Horizon venture with JR components. They will be around, with parts and support for the long term.

2. With XPS, I'm still using a 7 year old radio, just with a new module. Things fail, and when they do, who's taking responsibility? Futaba will say it's XPS, XPS will blame Futaba, and no one will care that I'm out a $5000 plane because of some hiccup.

3. The DX7 receivers are SWEET. They don't have any of the ceramic filters and things that we have on 72mhz receivers, just a single board, so they are small, light, and vibration resistant. In addition, they can handle up to 9v, and 30amps, so they will take an unregulated 2s lithium.

4. The response time on the DX7 is the fastest thing out there. They group functions together and transmit them at the same time so everything moves smoothly, it is a true digital link from your transmitter up to the plane, since they have gotten rid of all the PPM componentry inside. The XPS will be taking a PPM signal from your TX and shooting it out. It may end up being slightly faster than your transmitter before, but it won't be as fast as the true digital link the DX7 gives you.

The downside of the DX7 is that it is lacking in features, the big one for me is the lack of switch assignability, and with the DX7 I do not have enough channels to run my smoke system in the Edge unless I program some servos or use some electronic trickery. For me, the benefits of never getting shot down, never having glitches, and the NOTICEABLY better response of the Spektrum system outweigh those downsides. I will be buying a DX9 when it comes out, and keeping the DX7 as a backup, since I like to always have a backup transmitter because you never know when you are going to drop one or something weird is going to happen. If you figure out the pricing, you can sell the servos and battery for around $100, the receiver is worth $100, so you are really only paying $150 to have an extra transmitter and have the peace of mind of the DX7 now. That's an acceptable cost to me, and a downright bargain.

What I am doing for now is I've set the DX7 up in a few of my planes, one of which is a 27% Cap232. In the Cap, I'm running dual AR7000s, one running each side of the plane, with dual packs and switches, exactly like I will do in my 35% Edge. If the Cap has no issues after a couple of months, I'll pull the receivers out and transplant them, and put the Cap back to a singe receiver. Then I'll have proven the reliability in a much less expensive setup before committing the big bird to it. Until then, I'm continuing to fly the Edge on my 9zWC, but by the time spring/summer rolls around, I expect it to be flying on the DX7 as well.
Thanks.... ncrego, you could just substitute "10X" in your post, and you would have written what I would have. Thank you! It is a great explanation of what I believe is sound rationale for making the choices we have. I have no regrets on leaving the 10X.
Old 01-15-2007 | 02:38 PM
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Default RE: Spektrum DX-7

Mike...thanks for the dual elevator set-up...but what about single elevator...ailerons...and flaps, as in my giant scale Cub?
Thats the set-up that has me baffled. I outlined what I did a few posts ago, (page 41, post #1018) but I think my set-up is wrong...even though everything seems to work.
Whats your say on it?
Thanks.

Old 01-15-2007 | 02:39 PM
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Default RE: Spektrum DX-7

Here is what I did which so far works --after setting up the INHs on setup screen
mix in 5(or 6)--elev>Aux2 then hit 100% and 100%
Now back to rev screen -and rev aux2
thats it
the two channels are locked as a siamesed setup
This is also for me a must:
place both servos on a bench with arms facing and almost touching.
weight servos to prevent moving
Run servos thru entire throw range -with and without any expo
the tracking should still be absolutely identical (always happens for me)
install servos in model and DO NOT change any mix or sub trim or anything!!
adjust linkage till servos hit end points together and are centered together
This PROOF method , proves linkages and electronics are identical - If this is too much work - just forget it and do it your own way - but this way will assure perfect tracking under any loads.
Old 01-15-2007 | 03:01 PM
  #1045  
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Default RE: Spektrum DX-7


ORIGINAL: dick Hanson

Here is what I did which so far works --after setting up the INHs on setup screen
mix in 5(or 6)--elev>Aux2 then hit 100% and 100%
Now back to rev screen -and rev aux2
thats it
the two channels are locked as a siamesed setup
This is also for me a must:
place both servos on a bench with arms facing and almost touching.
weight servos to prevent moving
Run servos thru entire throw range -with and without any expo
the tracking should still be absolutely identical (always happens for me)
install servos in model and DO NOT change any mix or sub trim or anything!!

adjust linkage till servos hit end points together and are centered together
This PROOF method , proves linkages and electronics are identical - If this is too much work - just forget it and do it your own way - but this way will assure perfect tracking under any loads.
Abo****ely correct, Dick. I made a "servo board", with permanent blocks and 90*'s, protractor, etc. to do JUST this since I run the Hitec 59XX programmables. Doing it on the board translated to identical "in the plane" stuff - AFTER I fixed some mechanical "on airplane" items.

The really important step is NOT to tweak on these electronically after the "setup" on the board.....
Old 01-15-2007 | 03:27 PM
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Default RE: Spektrum DX-7

Correct. P-mix 5 or 6. Have to use a p-mix that has trim include. Sorry abou that. I edited my original post.
Old 01-15-2007 | 03:30 PM
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Default RE: Spektrum DX-7

No prob; I'm sure we're all glad to see you here, Mike, and hope for more insights.
It's a great radio, for certain!
Old 01-15-2007 | 03:30 PM
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Default RE: Spektrum DX-7

What is the objective with this set-up (Super Cub) ? Is it to use 2 channels for ailerons, 2 for flap and have a 3 position flap switch?
Old 01-15-2007 | 04:21 PM
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Default RE: Spektrum DX-7

ORIGINAL: MMcConville

What is the objective with this set-up (Super Cub) ? Is it to use 2 channels for ailerons, 2 for flap and have a 3 position flap switch?
Thanks Mike...
The Super Cub setup requires...Only one channel for Flaps, and using the three position switch for zero/20%/full flap positions.
Two channels for ailerons, and one channel for elevator.
Your input is greatly appreciated.
jim
Old 01-15-2007 | 06:34 PM
  #1050  
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Default RE: Spektrum DX-7


ORIGINAL: dick Hanson

This is also for me a must:
place both servos on a bench with arms facing and almost touching.
weight servos to prevent moving
Run servos thru entire throw range -with and without any expo
the tracking should still be absolutely identical (always happens for me)
One good improvement to your great elev servo sync setup;

With both servos on bench facing each other, while setting center & end-points w/servo programmer
on ONE servo to match the other - insert a screw from one servo arm -up to- the other servo arm.
Now, when checking results through Tx/Rcv, try screwing the screw into the other servo arm at
_center_ & _both_ extremes of travel.

Dead nuts means of being certain all 3 points match up.
Some of us have eyesight difficulties & the above eleminates such.


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