Big Beacon 4

This is the 4th in a series of 9 caches that will lead you to the summit of Mt. Wire. For more information, please see Big Beacon 1.
Big Beacon 4 is a small lock-and-lock.
Weird: When I first placed a cache here, my GPS receiver became extremely sluggish. I could walk 50 or 60 feet in any direction before the reading would register a change. I did the best I could to get a good reading. On a more recent visit, when I was about 100 feet from the cache, the receiver froze and wouldn't respond to any commands at all. I had to remove and reinstall the batteries to get it going again. There is something weird in the vicinity of this cache! Please post your experiences in your log.
Next: Big Beacon 5