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HomeAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › Homemad RX Pack?
06-04-2009 07:55 PM  9 years agoPost 1
RCHSF

rrKey Veteran

NC

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Can I make a Reciver pack out of this, and be fafe to use to setup my heli?

My t-rex 450 has the esc wires to motor soldered together, I had been setting it up in Throttle Hold.

But I rather use this.

What just Ground to Ground and Hot to Hot, the sensor wire does not provide anything right?

My RX is Spektrum AR6100, Hitec HS65MG Servos, and JR G500T gyro, this want overload anythinfg will it, should be about the same as a regular rx pack I think.

Thanks for your imput.

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06-04-2009 08:16 PM  9 years agoPost 2
BarracudaHockey

rrMaster

Jacksonville FL

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For just setting up it will be fine, yes, hot to hot, ground to ground, the signal wire isn't hooked up to anything.

Andy
AMA 77227
http://www.jaxrc.com

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06-04-2009 08:21 PM  9 years agoPost 3
Saint728

rrProfessor

Honolulu, Hawaii

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It would be fine to use as a receiver pack to set up your Trex 450.

Take Care,
Cheers, Patrick

Check the hotties in my Gallery
http://rc.runryder.com/helicopter/gallery/9019/?all=photo

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06-04-2009 08:23 PM  9 years agoPost 4
RCHSF

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NC

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Thanks I just wanted to be sure, before trying it, I thought it would, but cant be to carful these days with things.

Done Deal, now I can set it up with knowing it will not do a chicken dance on me.

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06-05-2009 03:18 AM  9 years agoPost 5
dkshema

rrMaster

Cedar Rapids, IA

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should be about the same as a regular rx pack I think.
Four NiMh cells wired in series IS a regular RX pack. Great idea for setup, don't fly with it, however tempted you might be sometime. The battery holder would be a bad idea as part of a flight pack in a heli.

JR/Spektrum -- Center red wire is + volts, outer brown wire is ground. Orange outer wire is signal -- if you ground it (connect the two outer wires together, you just made a binding plug).

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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06-05-2009 04:20 AM  9 years agoPost 6
tadawson

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Lewisville, TX

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Four NiMh cells wired in series IS a regular RX pack. Great idea for setup, don't fly with it, however tempted you might be sometime.
Depends on your radio. If you have not downgraded to one of the 2.4 systems that is voltage-picky, 4 cell packs still work perfectly . . . just don't use the battery holder you have shown - they get intermittent really quickly - use a real RX pack . . .

- Tim

Friends don't let friends become electrotarded . . . .

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06-05-2009 04:57 AM  9 years agoPost 7
dkshema

rrMaster

Cedar Rapids, IA

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TA -- he's using this to setup his heli on the bench, not to fly with. 4 NiMh cells is fine for the 2.4 systems, I'm flying several AR7000s with 4 cell NiMh packs, never a problem. My EVO 50 and Freya flew very well on 4-cell NiMh packs, as did my Caliber 5 while I owned them. All had AR7000 receivers. The Caliber 4 and Caliber 30 I fly on a regular basis run on 4-cell NiMh packs. They, too, have AR7000s installed.

As for the battery holder, again, it's fine -- he's using this on the bench, not in the air (and I did note that he shouldn't try to fly that pack ever).

And this is a 450 electric heli he's setting up, those are at least 2000 mah AA cells. You'd really have to work at it to drop that pack's voltage to 3.5 volts or less to kick in the low voltage reset feature.

-----

I have a small 800 mah NiMh pack I made up out of four AAA rechargeables that I use to set up all of my electric helis so I can get the radio stuff out of the way prior to digging out the ESC and programming it. None of my 2.4 GHz receivers has ever had a problem with using it.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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06-05-2009 05:14 AM  9 years agoPost 8
tadawson

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Lewisville, TX

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Four NiMh cells wired in series IS a regular RX pack. Great idea for setup, don't fly with it,
What you said, quoted, is that he should never fly with a regular 4 cell NiMH pack - reread your words, and that is what I was taking exception to. You many not have *meant* that, but that *is* what you said . . .
no mention of the battery holder being the no-fly component . . .

- Tim

Friends don't let friends become electrotarded . . . .

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06-05-2009 05:20 AM  9 years agoPost 9
dkshema

rrMaster

Cedar Rapids, IA

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Edited that post to mention that the battery holder is the problem. Not the batteries themselves.

Of course, to point out a 'nit' in your post:
If you have not downgraded to one of the 2.4 systems that is voltage-picky, 4 cell packs still work perfectly
It seems to state that 2.4 GHz systems should not be flown on 4-cell packs, as they are voltage picky. And that, is simply not true with regard to flying 4-cell packs and 2.4 GHz receivers. 4-cell packs and 2.4 GHz systems are not a problem.

Now that should even out the nit-picking contest, we're even...one for one.

The flame war should now be over.

By now, I'm sure he's gone ahead, wired up his battery holder and is merrily setting up his heli using it.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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06-05-2009 05:25 AM  9 years agoPost 10
tadawson

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Lewisville, TX

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Thanks. Not trying to be a picky a-hole, but just trying to be sure that we give accurate and complete advice!

- Tim

Friends don't let friends become electrotarded . . . .

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06-05-2009 12:45 PM  9 years agoPost 11
BarracudaHockey

rrMaster

Jacksonville FL

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Just to clarify, are switching to 2.4 systems downgrading? Or is it just switching to a voltage picky one downgrading?

Andy
AMA 77227
http://www.jaxrc.com

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06-05-2009 03:23 PM  9 years agoPost 12
dkshema

rrMaster

Cedar Rapids, IA

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'Cuda -- I switched to 2.4 and never looked back. 72 MHz stuff I have has been relegated to plank use.

Electric and nitro, pretty much the same power sources for the electronics, no problems. Don't consider it a downgrade at all.

The folks who were/are having voltage problems were most likely those using marginal BECs in their electrics to begin with.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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06-05-2009 06:56 PM  9 years agoPost 13
tadawson

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Lewisville, TX

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Just to clarify, are switching to 2.4 systems downgrading? Or is it just switching to a voltage picky one downgrading?
I am currently on 50MHz, and for me, I regard any 2.4 system as a downgrade - 2.4 offers me nothing I need or want, just a more crowded and hostile RF space.

In this context, I was referring to the fickle power requirements of a lot of 2.4 gear compared to 72 . . . .

- Tim

Friends don't let friends become electrotarded . . . .

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06-05-2009 07:01 PM  9 years agoPost 14
uk2bx

rrApprentice

Bronx , NY

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Hi Tim , just out of interset what made you choose 50mhz ?? , i thought that was mainly uesd in europe and asia .

www.flysrw.com

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06-05-2009 07:05 PM  9 years agoPost 15
tadawson

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Lewisville, TX

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50MHz is a HAM radio band, pretty much all over the planet. Since it requires a license, you don't get the dip$hit park flyers, or the commercial services in the band - it's HAM radio operators *ONLY*, so the potential for interference is pretty much nil. Couple that with the far better propagation characteristics of 50MHz over 2.4GHz, and it's pretty easy to see why I stay put. That, and there are very few guys out here that took the time to get the HAM license and fly R/C - I have never had to wait for a pin, even at large events . . . ever!

Oh, and I get to work on (IE freq change, or whatever), design, and/or build my own gear if I want to - legally!!!

The only thing I don't have is model match, but I have a functional brain, so I don't regard that as a loss . . . :-) :-)

- Tim

Friends don't let friends become electrotarded . . . .

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06-05-2009 07:06 PM  9 years agoPost 16
uk2bx

rrApprentice

Bronx , NY

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Thanks for the info...

www.flysrw.com

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06-05-2009 07:38 PM  9 years agoPost 17
tadawson

rrElite Veteran

Lewisville, TX

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No problem!

- Tim

Friends don't let friends become electrotarded . . . .

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06-05-2009 09:50 PM  9 years agoPost 18
BarracudaHockey

rrMaster

Jacksonville FL

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Is the functional brain part up for debate?

<that was a joke>

Andy
AMA 77227
http://www.jaxrc.com

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06-07-2009 04:52 AM  9 years agoPost 19
seattle_helo

rrKey Veteran

Seattle, WA USA

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so the potential for interference is pretty much nil

That's a pretty smug comment there.

Back when 72Mhz was the only other game in town I agree 50Mhz was a relatively safe place to operate. But certainly not now. Why would you risk flying anything of consequence on a non frequency diversity RF path, much less on an antiquated, LF single channel that is utterly vulnerable to many sources of interference, both legal and not? Among them, broadband over powerlines alone is reason enough to stay away from any LF channels, much less 50Mhz. Go read your ARRL newsletters about that losing battle with the FCC.

My apologies for the OT post.

nick

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06-07-2009 07:01 AM  9 years agoPost 20
tadawson

rrElite Veteran

Lewisville, TX

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Well, the ARRL news have been replete with victories over interfering BPL systems, so you are in error there. 50MHz is a primary allocation, so BPL *CAN NOT* legally interfere.

And as far as interference, I think you will find that 2.4 has a lot more noise in it that 50 ever will, not to mention the shadowing issues at 2.4. Ever wonder why long distance communications are not done at 2.4? It's because the rate of atmospheric attenuation is so much higher than other frequencies, and atmospheric effects are so much more pronounced at 2.4. I used to engineer microwave links in the 2GHz space, and we needed around 90db path *gain* to assure that we would not drop a connection to to atmospheric conditions!

To call VHF/Low band "antiquated" is simply naive . . . just because 2.4 came out does not mean that everything else ceased to work. Frequency diversity on 2.4 is mainly due to the flaky nature of that band, as well as the "free for all" utilization in a pretty much unregulated space.

Oh, and what illegal devices are you aware of in the 50 MHz space?

Me, I'm staying put until I have a reason not to. Let the lemmings debug 2.4 first . . . .

- Tim

Friends don't let friends become electrotarded . . . .

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HomeAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › Homemad RX Pack?
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