i just purchased 2 transmitters 1 hitec flash 5 fm. and<font class="Apple-style-span" face="Arial, Helvetica, sans-serif"><span class="Apple-style-span" style="font-size: small;">a futuba skysport t4vf tx. i got them really cheap and not sure if they will work with new recievers. i just learned that there a change in frequencies in the 90's. i hope this wasnt a waste of money. i also purchased futaba 4 channel reciever fp-r4f mode II. and 4 hitec HS-322 hd servos. the receiver is 72.080mhz i appreciate any help<font class="Apple-style-span" color="#333333" face="Arial, Verdana, sans-serif"><span class="Apple-style-span" style="line-height: 27px; font-size: large;">
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Ok, well, the Futaba Skysport IS a 72 mhz system. It is fairly current as far as 72 mhz systems are concerned. It is a single system, meaning no memory or multiple models, ie. no computer power. So, it is for one plane.. or if you want, you can have several planes with the same frequency receiver and set them all up the same. Many of the RTF's came or come with that radio system. I am not famaliar with the Hitec system. Someone else will have to work with you on that one.

Just about any servos will work with this system, so the Hitec servos are fine.


72MHz Channel / Frequency Table

11 / 72.010 28 / 72.350 45 / 72.690 12 / 72.030 29 / 72.370 46 / 72.710
13 / 72.050 30 / 72.390 47 / 72.730 14 / 72.070 31 / 72.410 48 / 72.750
15 / 72.090 32 / 72.430 49 / 72.770 16 / 72.110 33 / 72.450 50 / 72.790
17 / 72.130 34 / 72.470 51 / 72.810 19 / 72.170 36 / 72.510 53 / 72.850
20 / 72.190 37 / 72.530 54 / 72.870 21 / 72.210 38 / 72.550 55 / 72.890
22 / 72.230 39 / 72.570 56 / 72.910 23 / 72.250 40 / 72.590 57 / 72.930
24 / 72.270 41 / 72.610 58 / 72.950 25 / 72.290 42 / 72.630 59 / 72.970
26 / 72.310 43 / 72.650 60 / 72.990 27 / 72.330 44 / 72.670

Hope that helps.

CGr.

well the hitec one is a computer base one it isprogrammable. so im assuming the receiver is somewhat up to date good thing is i only have 38 bucks in all of it.

Did you get a manual with that Hitec Flash 5? If not, you will need one to program it.

72.080 Is not one of our hobby band channels and is illegal to use and became so long ago in 1991. Since the receiver has that crystal in it its likely the Rx is also an old wide band unit, is it Am or Fm ? if its Fm its probably not a dual conversion rx. probably should have been round filed years ago, You can check at the futaba website.

The Flash five is an older entry level computer Tx and legal to use as long as someone has not gone and switched crystals, you can only do that in receivers. That Tx untill fairly recently would have sold for perhaps twentyfive bucks around here but not anymore. Even old entry computer radios have become almost worthless.

The bottom line is at this time of change there is a flood of old crap being sold everywhere some acceptable and some even illegal and unless you are knowlegeable most people get burnt when trying to piecemeal a system together. get with your club or mentor before buying anything used. Heck for that matter anything new also!


John

i was able to download the flash5 manual. not 100% sure of all the specs because they are in the mail and should be here by the end of the week. i am in the process of building a corocub.
with a 25cc featherlite conversion. i havent flown since i was a kid. so this has been a trial and error process for me. i really didnt think the age of the transmitter and receivers would have made adifference but i found out it did after i purchased these items. and the nearest club is about an hour away ao all my mentoring is going to be coming from u guys.

That mistake is going to cost you dearly in the wallet and has already. That Rx is a vintage futaba AM rx and even without considering the fact that its almost certainly wideband (thats bad, very bad) it cannot ever work with either of those Tx's since they are FM units there can be no compatability.

Also those servos cannot plug to that RX no way! That relic was used in the days of the Futaba G plug that was 90 degree side plugging and had uneven pin spaceing, won,t work without a hugh hassel.


Trying to cobble up a package by sorting through all the crap that that is being peddled out there by people either ignorant of what they are selling (that sucks) or people who are just common cheats (thats worse) is certain to end up in failure.

Find that mentor or its only gonna get far worse, thats a fact.

Also as a past club safety officer I CAN NOT recomend a cabaged together system for a plane the size you are speaking of Care and caution need to be increased as the size of the aircraft increase. However I am a big fan of SPADS they are a ton of fun for the buck. GOING cheap on the radio is usually a poor experience though.

Woops... looks like, even though I qualify for senior discounts, I've not been in this hobby long enough to recognize an "old-timer " radio system [X(]

CGr.

CG if you look carefully at the servo ports on the Rx the unequal spacing of the pins for the old 'G' plugs becomes apparent. Its a good thing to help in spotting the really dated stuff. Another point is that curious emblem with colored dots on the label puts the rx somewhere in the eighties.

John

so your saying the tx's would work fine with an up to date receiver? i onlt paid $6.00 for it so it a mistake i wont make again. i guess i kinda gothustled a little ive only got 38 in it all. it was a woman saying her kids were changing hobbies and was selling there stuff to pay for the new hobby. i think shestretchedit because if that thing is from the 80's then it is as old as i am. and i know my mom isnt paying for my hobbies anymore lol. well thanks for the advice. so what do you think i should use for the corocub?

The Flash five is by far the best of the two Transmitters I beleve it has five model memories and some basic computer functions The question of course is does it work and is it safe to use, I have no idea The battery pack could be questionable, is that safe to use I have no idea. A new pack is probably going to cost 40 to fifty dollars.

For a receiver you will need a negative modulation shift FM Rx. Can be either single or dual conversion but must have the appropriate dual or single conversion crystal that is the same channel number as your Tx. You can change receiver crystals but not Tx crystals.
Some Futaba Rx's that meet the above criteria will work with the Flash Five. Examples of Hitec Rxs which may or may not work depending upon whether or not they also meet the above Criteria: (Many were also produced as positive modulation shift and will not work with the Flash five as it is not shift selectable) Are the 535, 555, various Supremes, SuperSlim and Electron Six.

The servos will probably work you can count on at least one having been subtancial crash (note the broken lug) .

You also will need a suitable wall charger, a flight battery pack, a six inch extension and a switch harness isn't it amazing how we are now rivaling the cost of a brand new quality system?

You also need to be aware that buying a used Rx even more than Tx's is a complete crap shoot, best of luck.

John

The Flash Five is a good radio but the manual will be necessary as programming it is not intuitive. It is awkward. Hovever, if nobody has changed the crystal and the battery pack is good, it is a rock solid radio. Go for it.

thats a pretty decent trasmitter, i used to have one... its kinda tricky at first programming it though

There are two versions of the Hitec Flash 5 transmitter. The original, and Flash 5 System X. I think yours is the original because I do not see a big "X" where it says Flash 5. I do not know all of the differences. The original has less features but I'm pretty sure it (or the Futaba) will work fine for a Cub style model.

If they have one in stock on the same frequncy as either transmitter, this is a super deal on a very good receiver
http://www3.towerhobbies.com/cgi-bin...I=LXMFU5**&P=0
$31.26 including the receiver crystal. It is compatible with the Hitec or Futaba transmitter.

Here is another option if the Hobbico is not available on your frequency.
Receiver $29.99 http://www3.towerhobbies.com/cgi-bin...?&I=LXKYK3&P=0
Crystal $7.59 http://www3.towerhobbies.com/cgi-bin...I=LXN503**&P=M

The servos in the picture will plug in to either of these receivers.

Carrell

I live in a suburban neighborhood so there's no possibility (for me) of flying anywhere other than at a club. It is 45 miles from my house to the field. I love flying with the guys in the club. Even if I could fly locally I would still go to the club.

If at all possible, visit the club and at least get an experienced pilot to do the maiden flight and get the plane trimmed for safe and stable flight. Ideally, join the club and get some time in with an instructor before moving on to your private field.

Carrell

let me ask a dumb question. the crystals frequency are catorgized by channels ? if so why not just go by the frequency. so anynegative<span class="Apple-style-span" style="font-family: Verdana, Arial; font-size: 13px; -webkit-border-horizontal-spacing: 1px; -webkit-border-vertical-spacing: 1px; ">modulation shift reciever should work as long as it has the same frequency crystal. but why cant you change the crystal in the transmitter</span>

You cannot change the crystals in our transmitters without retuning by federal FCC regulation.

Remember concerning the frequency spectrum there is no 'middle of nowhere'. If you refuse to follow FCC regulation you indeed put our free and unlisensed use of the this band at risk as it coveted by many who will pay hugh lisense fees for its use.

I can only urge you to become a responsible member of the modeling community and do the right thing.

Frequency channels within a band and modulation shift are two entirely different issues. Agine for a tx and rx to be compatable, that means function with each other the both must be of the same modulation shift. Or either the Tx or Rx must be manual/auto selectable types so the same modulation shift can be selected (non of your stuff is manual/auto selectable)



Now there is also the separate matter that the Tx and Rx are both FM, AM or PCM If they are both not one of the three then agine no compatiblity with even more traps and snare if you get into PCM and propretary systems with those.

Finally of course the Rx frequency channel number must match your Flash five.

Trying to save a couple of bucks with used Rx's is just like Peeing down a dry well to find water!

You are already half way down that dry hole. Get local knowledgeable help before buying anything Its only gonna get worse and you will be wasting even more money.

John

Many years ago "Someone" decided that 'Channel 11' is easier to deal with than '72.010' but I do not know why.

As already written, you are not supposed to change transmitter crystals in the US. It costs $20 to $40 to get it done at a service center which is probably not cost effective for either of the units you have.

Receiver crystals can be changed by the end user. The Hobbico and Hitec receivers I linked yesterday can have any crystal (72.010 through 72.990) (channel 11-60) installed with no tuning issues. The Hobbico receiver uses Futaba crystals, which cost twice as much as Hitec crystals.

I learned to fly using a Hitec Flash 5. The most annoying thing about it was the digital trims. You have to save the trim setting BEFORE turning off the transmitter or they are lost.

Stan

That might be one of the differences between the original and the 5X. My brother had the 5X and it had automatic 'trim memory.'

i have no intention on breaking the law i didnt know it was against federal reg. thats why im asking. and i would go to the club in monroe but i only have sundays off so it makes it a bit difficult i have plenty of pasture land to fly. thanks for all the great advice. im trying to figure it out as i go. i didnt think there was so much involved in the hobby. but with you guys help mabe i'll make it. i had a taste of rc flying as a child . i havent been able to get it out of my blood. ill be 30 next year and the wife has calmed down

Mike even a few visits to Monroe on a few sundays can make a hugh differance to your ultimate success. Give them a chance and often you can buy used complete packages from the same folks who are to be your mentors. Now this is a completely different matter when they are the ones who will be using it (training you).

I have rebuilt, restored, refurbished, and salvaged so many trainers over the years its impossible to keep track. A few I have Kit Bashed into unusual funky airplanes, some I have packaged up with complete good usable systems such as your Flash Five and sold for a pittance to folks who showed interest locally and seemed they may become future flying buddys. Some I just gave away to deserving folks.

John