**Assumption:** I *think* it's generally true that commercially available AC/DC wall-worts can be expected to be pretty noisy (e.g. you can't count on much better than 5% stability).

**Background:** I'm dorking around with an RF application right now, and I hypothesize that some significant subset of my headaches is coming from powering my RF receiver with 5VDC coming directly from an AC/DC wall-wart (i.e. no RF choke, no regulator, nothing).

**Question:** What's the simplest way (e.g. fewest parts) and cheapest mechanism for converting the "angry" 5VDC off a wall-wort into a "happy" 5VDC for my RF receiver? I think the other subsystems are more tolerant to noisy power. 

**Aside:** I wish I could give more definitive characterization of the noise coming out of the wall-wart, but sadly I am sans o-scope.

**Edit1:** In response to the request for more detail on parts being used:

* [Wall-Wart](http://www.powerconversion.com/assets/dch3_ds_1222495015.pdf)
* [RF Receiver](http://www.sparkfun.com/datasheets/Wireless/General/MO-RXLC-A%20data%20sheet.pdf)