Radio noise

Help......
I've been trying to sort out some radio static/crackling for the past month. At first you could not stand to have a headset on, then I replaced the filters on the mags, added a noise filter to the generator and cleaned the engine mount ground. This improved things immensely, however, there is still some noise, when I turn on the landing light the noise goes away and stays away.

instead of reposting it ...............

http://www.supercub.org/phpbb2/viewtopic.php?p=147832&highlight=#147832

has a good thing for running down the noise.....

edit: assuming you have taken all the main wire joints apart and cleaned and redid them..... it will most likely be an old master solenoid/(bad contacts), or if you only have a BIG master switch bad contacts in there......you can temporarily jumper past them to identify the bad spot quickly as described in the above link