Originally Posted by wylieruneyjr

Servos that were plugged directly in the RX , did not jitter. Once I moved them out, to the outboard positions with leads they glitched badly. So it has occurred. Not a myth.

But did they jitter? Remember the glitching is a separate issue.

Long leads do not cause jitter. they cause glitching.

Originally Posted by Four Stroker

Maybe some 16 AWG extensions would solve this problem ? Also aftermarket extensions have problems from poor crimps.

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this is the separate glitching issue and is caused by running them on long leads.

JR R922 driving HS-7950TH per- installation functional tests (1 min 58 sec)

this is the jittering issue not to be confused with glitching. This is NOT caused by running long leads. This problem gradually develops as the potentiometers prematurely wear out. ...regardless of the length of the leads.. Hitec has been aware of both issues for over a year.

7950TH (1 min 28 sec)

Originally Posted by BeverleyFlyer

Question for all you out there that run these servos at 6 v, I'm just curious why would you spend extra money buying high voltage servos and then run them on 6v?

I personally run 6V Nimh packs in my planes.
A proven power supply and I have never ever had a battery issue.
So I am not going to fix something that isn't broken. ( To each their own )
I am going to build a PAU 43% Edge 540, which PAU suggest 800 oz of torque on the rudder.
I have all HS-5955TG from my other planes for flight surfaces, but I was going to go with two HS-7950TH's on the rudder.
At 6v the 7950's produce 403 oz.( 2 combined 806 oz. ) compared to the 5955/7955's which are 333 oz ( 2 combined of 666 ) which falls 234 oz. short of the suggested oz. for the rudder.
Running 6V where it seems nobody is having issues at 6V I could use two servos instead of three.
And some of the prices out there, there is only a couple of bucks between the two.

They are too slow for my liking at 6v. I have mostly ran them at 6.5v . Jitter just keeps coming back.

They are very erratic on 7.4v.

So why do you guys keep buying these servos ? What did Will Rogers say ?

It is not a case of continuing to buy a servo with known issues. Many of us have had some very positive experiences with other servos from the same manufacturer. In my case I have had execellent service from my 5955tg's.

So therefore when Hitec released a new high torque, hi res, TG servo, I personally thought that they would be a great option for my new aircraft. Fortunately for myself it has proven to be the case (so far!) however unfortunately others have experienced a less positive experience.

regards,

Jeff

Originally Posted by flyguy2

Yes please keep us informed. This confirms even more that this jittering issue is NOT NORMAL and is NOT present from the start like the service bulletin portrays. Love it!

Once I hit 30+ flights I'll take a little video of the plane sitting with the engine off. That way you can see with your own eyes instead of me describing it. It's possible they move a little bit, we'll see next time I take it out. After my 4th flight I'll be at 30 flights.

Originally Posted by Four Stroker

So why do you guys keep buying these servos ? What did Will Rogers say ?

I suspect most of the guys on here are in the same boat I'm in. I purchased 8 of these little gems about a year ago, back before I realized how bad these servos are.. Then I was foolish enough to believe that Hitec would step up and make this right.. A year later I'm not so hopefull. Hell they are still selling / advertizing 7950s as being suitable for HV operation when they know damned well that a large percentage of people trying to use them in that fashion will have nothing but troubles. Talk about disreputable... Me, I'm just trying to salvage something out of the the ~$900 of my hard earned cash that I spent on these things.. So to answer your question, I don't keep buying them and I doubt Hitec will EVER get another penny of my money for ANY product they they make in the future...

I will keep buying their servos. Call me crazy, but I like features and will continue purchase Hitec Products.

Okay Mike send me some free Stuff, And a couple of big stickers for my plane.

Originally Posted by wylieruneyjr

I will keep buying their servos. Call me crazy, but I like features and will continue purchase Hitec Products.

Okay Mike send me some free Stuff, And a couple of big stickers for my plane.

ok, your crazy.

Originally Posted by jamesrxx951

ok, your crazy.

X2!!

I feel your pain.

Do these servos work when you have a Hitec TX, RX, Servos ?

Do they have these problems when you use a HV, 8.4 volt regulated supply ?

Have you tried a ubiquitous 7 cell car pack ~ 8.4 volts.

Can you program back the deadband ? Hitec used to ship with a 5 micro-sec deadband.

Everything including pots wears out. If they are continuously jittering (and occasionally glitching), the pots aren't going to last long.

flyguy2;

Are the servos glitching or is the receiver glitching ?

Originally Posted by wylieruneyjr

I will keep buying their servos. Call me crazy, but I like features and will continue purchase Hitec Products.

Okay Mike send me some free Stuff, And a couple of big stickers for my plane.

Nah, I won't call you crazy because I like features too.. That's why I bought the 7950s in the first place.. Hitec really seemed to be doing LOTs of innovative stuff with the A9, and magnetic encoders and brushless motors for servos, etc. I wasn't too concerned that there were some early problems but it's now a year later and I honestly can't see that they have done anything to fix these problems.. They seem to be coming out with one service bulletin after the other but they don't offer any solutions for the problems that their customers are having.

Any manufacturer can have problems but it's how they deal with them that is important to me. Hitec just seems to be charging on to the next product so they can get the next guys money and aren't supporting existing customers. I think Hitec's response to these issues is just plain shameful. No matter how innovative their products are or what new features they provide if they won't stand behind those products then they are just worthless as far as I'm concerned...

Originally Posted by wefcisco

Nah, I won't call you crazy because I like features too.. That's why I bought the 7950s in the first place.. Hitec really seemed to be doing LOTs of innovative stuff with the A9, and magnetic encoders and brushless motors for servos, etc. I wasn't too concerned that there were some early problems but it's now a year later and I honestly can't see that they have done anything to fix these problems.. They seem to be coming out with one service bulletin after the other but they don't offer any solutions for the problems that their customers are having.

Any manufacturer can have problems but it's how they deal with them that is important to me. Hitec just seems to be charging on to the next product so they can get the next guys money and aren't supporting existing customers. I think Hitec's response to these issues is just plain shameful. No matter how innovative their products are or what new features they provide if they won't stand behind those products then they are just worthless as far as I'm concerned...

Amen brother.......