Last night, I tried connecting the LED to a Aten powered USB hub.

Result: Absolutely no AM interference whatsoever!

So... this is solution 2.

--
@~@ Might, Courage, Vision, SINCERITY.
/ v \ Simplicity is Beauty! May the Force and Farce be with you!
/( _ )\ (x86_64 Ubuntu 9.10) Linux 2.6.38
^ ^ 20:58:01 up 2 days 32 min 0 users load average: 0.00 0.01 0.05
不借貸! 不詐騙! 不援交! 不打交! 不打劫!
不自殺! 請考慮綜援 (CSSA):
http://www.swd.gov.hk/tc/index/site_...sub_addressesa

> Learn to reply to your existing thread to keep all posts together. You
> started a NEW and disconnected there here.

I branched because this new post is NOT exactly a continuation of the
first one. It involves a different solution.

--
@~@ Might, Courage, Vision, SINCERITY.
/ v \ Simplicity is Beauty! May the Force and Farce be with you!
/( _ )\ (x86_64 Ubuntu 9.10) Linux 2.6.38.2
^ ^ 17:20:01 up 3 days 18:49 0 users load average: 1.15 1.11 1.14
不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA):
http://www.swd.gov.hk/tc/index/site_...sub_addressesa