i had an area with immense rf interference and i couldn't get my customer's mx3k to work consistently from the patio out back. so i coiled an extra ir flasher with the tips cut off around the mrf 300 reciever and closed the antenna. the coil makes for a nice "shield", so your rf is kickin ass with no interference!

try it on the mrf250 also!

That's a very good tip! Can you post a picture of it, so everyone can get a clear understanding of what you're doing? :)



Thank you,
Damon DG
= = = = =
http://www.ProRemotes.com - Authorized Dealer & Remote Programming Services

If you have a picture please send it to my e-mail. I am currently having major rf issues and cant seem to get a hold of it. Thanks

I'm guessing the closing of the antenna did the trick. Wrapping the emitter around the MRF-300 sounds like black magic to me.

Dino

Unless it is grounded - then it can act as an RF ground.

I doubt wrapping an emitter wire (grounded or not) around an MRF-300 would provide enough coverage around the unit to shield from EMI. I'm just speaking from experience as an EE.

Dino

Isnt the point of the 300 that you can move the 150 to a interference free location.

As for the 250.. I have had great sucsess just removing the antenna.

Who knows maybe itll come in handy one day.

I have heard that tin foil works too, but I have never been this desperate.

I guess that explains the hat.. ;-)

rosariorose9

Tin foil has little effect at blocking RF unless you ground it somehow and then it is typically still poor. Grounded shields are probably the best alternative but still usually yield less than adequate results. There is a specific metal, Mu (pronounced Mee-ooo, with less emphasis on the ee than the ooo) metal that has good RF shielding characteristics. In fact, it is what is used to shield magnetic field RF in speakers that are intended to for placement next to TV monitors in professional applications and around sensitive tuner components in broadcast tuner/mod/de-mod applications. It's expensive, a little hard to find and of course preforms better at some frequencies than others but if you can find some you might give a try. Of course blocking all RF from a MRF would be counter productive so in this case encasing the offending component (if it is a component) would be the way to go.

I just read this and now doubt it's helpfulness, but maybe someone may find the info useful at some point. My apologies to the rest .