JR Radio Question

[AWorrest at aol.com]

Craig,

It sounds to me that you have a transmitter problem.  With the JR 8103 
transmitter I typically have over 400 feet ground range. This is measured on an 
asphalt runway.  The transmitter antenna is collapsed and pointed at the model.  
The receiver antenna is 90 degrees to the transmitter antenna.  This ground 
range applies whether I'm using JR, Airtronics, or Hi-tech FM receivers.  Check 
to see if the transmitter antenna is firmly screwed into the base connector.  I 
have often run my transmitter with the antenna fully collapsed (but not 
removed) for several minutes at a time with no ill effects.  Just to be certain 
feel the module.  It may get warm, but should not be hot.

Allan Worrest

In a message dated 6/4/2004 11:51:33 PM Central Daylight Time, CELeon at aol.com 
writes:

> When doing a range test with a JR 8103 FM transmitter and a JR 549X 
> receiver, without the engine running, standing 90 degrees to the receiver antenna, 
> I'm getting jitters in the control surfaces at about 40 or 50 feet, with the 
> transmitter antenna fully collapsed.  Changing the position or location of the 
> receiver antenna does not seem to make any difference unless I pull it out 
> of the plane and forward of the cockpit and engine.  This is an all balsa 
> Viper.  Same results with two different receivers.  Flew it once and it glitched 
> in the air 3 times.  Roughly the same location each time.  About 30 degrees 
> to the right of where I was standing.  Some local club members think that 
> leaving a JR transmitter on with the antenna fully collapsed for more than a few 
> minutes will damage the module, and might be causing the problem.  Any 
> suggestions will be appreciated.  Time to send it to Tony?
>  Thanks,
>  Craig Leonard
>  NSRCA 2405
> 

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