Strange Interference Problems - Need some help!

[jdbostrom]

[color=#000000]I have been having some strange problems with interference in my WTC for my Gato. Before I dive right into the problem, I ought to first mention that my antenna is in two pieces. One small piece runs from the rx to the endcap where it attaches to a second piece that exits the WTC. With that said, here is my problem]



Edited By JDBostrom on 1124561417

[anonymous]

This is the same problem

This is the same problem I'm having with my D&E 3 inch WTC in the scratch built Washington of mine. When I was testing in the pool I got below 4 ft. lost signal and the sub went mad. This doesn't happen in fresh water but it worries me.

Before the fail safe finally got to kick in (and it worked fine) the sub went full power into the bottom, backed up and pitched so my nice Engle prop was ripped off and damaged the rudder. Not pretty but all fixed now.

As long as I have a signal everything is fine and my other subs when they lose signal just stop working and no glitching. they have the ant inside the WTCs.

I haven't tried hooking back the wire direct to the RX as you have but I'll take your word for it and ask the same question.

How do we fix this problem? I've been in RC jets, planes and now subs for a lot of years but have never encountered this before.

Steve

[stoene]

Does it do this when

Does it do this when dry?
How does the antena exit the WTC?
Have you tried another receiver (current one sensitive)?

[silent runner]

This does pose an interesting

This does pose an interesting dilema. I have not yet installed my D&E 3" WTC in my Permit class, so will be 'experimenting ' as I go. Could this be related to the type of wire used for the WTC antenna or length of the antenna? I have noted, and just did so as I was reading above, that the lead supplied with the WTC is 8" shorter than what is on the receiver(Futaba). I am not certain how critical length is with the newer systems, but do know from many years of racing 1/8 scale hydros that a lot of radio problems were solved by 'correcting' the length of the antenna.
Steve, I know you're experience with different installations, and I had a similar problem with my old Ohio class sub. It took some repositioning of the antenna in the hull to stop me from going swimming.

[anonymous]

According to Merriman who I

According to Merriman who I just heard from it could be the internal antenna lug hitting the motor or aluminium rail. I'll have to check this. If that's not it change the RX and or try keeping the antenna inside.

Steve

[silent runner]

Thanks for the heads-up Steve.

Thanks for the heads-up Steve. Looked at mine again and it is possible for the lug to hit the motor so I wonder if a layer or 2 of heat-shrink would prevent direct motor contact. It doesn't look like the lug can make contact with the mounting rails, but what about interference from contact with the servo itself? I know full well that David knows his product, but have second thoughts about keeping the antenna inside.
Let me know what you find.
Mike

[anonymous]

Mike,

I don't see why not.

Mike,

I don't see why not. It certainly has nothing to do with the D&E WTC. Just the way we install things.

I'll be attending to this matter soon and report back. My hunch is that it's the RX in my case.

Steve

[silent runner]

Steve,
thought you meant keeping the

Steve,
thought you meant keeping the antenna completely inside the WTC. My misunderstanding.
Mike

[anonymous]

I may try that though.

I may try that though. My Seawolf, Kilo, Akula and VIIC all have them inside coiled around a flat rectangle of model ply and I've had no problems with them even at a lake 4 ft. under and many feet away.

We'll see.

Steve



Edited By U812 on 1124675719

[jdbostrom]

Well this is really strange.

Well this is really strange. I finally finished my WTC and closed everything up for its first "enclosed operation". Interestingly the problem seems to be completely gone. Strange, but who cares? It works now.

Jonathan

[anonymous]

Good news. go with it!

steve

Good news. go with it!

steve

[tabledancer]

Now we can discuss my

Now we can discuss my problem. I just finished with my wtc except for the rx,I`m running a AirTronics micro receiver and it will be in the small compt.up front.The plan is to run the antenna outside the wtc through the front endcap,then run the antenna around the inside of the hull till I run out of wire.Can I cut the wire and reconnect it with some sort of waterproof plug so that I can disconnect it when I need to remove the wtc without screwing up the match on the antenna.
TD

[anonymous]

Yes. Just add a brass

Yes. Just add a brass screw shaft through the end cap nearest the RX. Then double nut it on the inside and outside. Seal it good.

Cut your antenna wire and attach inside wire too the double nut and secure it tight. Then do the same thing to the outside.

Here's a picture of the D&E miniatures WTC to help.

Steve

[tabledancer]

Thanks,just what I had in

Thanks,just what I had in mind.
TD

[anonymous]

You bet!

Steve

You bet!

Steve