ORIGINAL: yl5295

Hey guys....

There is enough speculation and comments going on in this thread that I though I should probably make a few comments and clarify a few things.

I am the designer and manufacture of the WRC IBEF (product being discussed) and I am always open to discussions and ideas on how to improve our models. (like in the case of this it eliminates the cost and weight of a battery, switch, and maybe even an optical or electrical kill switch).

The units were tested for RFI and EMI emmission under high current draw as well as for interfence with diffent engines and radios. I can tell you that the filter in the IBEF will provide >50db noise attentation at 30Mhz (if you are not an RF engineer 50db is a noise reduction of >>10,000 times). There is more RF noise coming from the sparkplug wire than the IBEF. Still I wanted to be sure so I did a final set of tests before releasing it. In these tests I used know problematic engines and ignitions. In another case I wrapped an IBEF arround a G45 unshielded sparkplug wire. In another case I pulled the plug wire loose from the plug where the spark was arcing to the spark plug. Then for each of these test I range tested with 72Mhz and 2.4Ghz radios with a seperate ignition battery and the IBEF. In no test case was the radio range reduced (i.e. due to interference).

It is an easy test to see if any interference is coming from the IBEF. Simply do a range test and mark the spot. Then replace your ignition battery with an IBEF and repeat the range test. I expect that no one will ever see >5% difference in range and I have not seen any difference in all of my testing.

The IBEF has three major features/sections in it. First it reduces the voltage going to the ignition to be within manufactures' guidlines. Secondly is has an isolated power switch that can turn power on and off to the ignition. Finally it has a set of RFI/EMI filters to prevent any ignition noise getting back to the receiver.

When I have RX interference from engines in the past there was no wire/metal connection between the RX and the engine. It was simply the plug wire was radiating enough RFI energy to cause a problem... if this is your situtation then even an optical cutoff will still have a problem.

With several hundred of these being flown and not a single interference event being reported I think you guys can relax. New technology always comes even though many of us may doubt if it can really do what it claims.

I will be open and honest that with > 750 shipped now I have had 6 reports of slow ignition turn off when used with a Spektrum AR7000 receiver. I found the issue and now it has been corrected on future shipments and those 6 people are either receiving no cost repairs or replacements.