Eliot Mayer, W1MJ, writes on the NEMassFoxHunters and Waltham ARA mailing lists:
I recently assembled a 5-watt fox, and plan to put it out this Sunday, January 23, from 10 AM (or earlier) to 4 PM. I will make another post here on Sunday morning to confirm successful deployment (or not).
The suggested starting point is Elsie Turner Field on Trapelo Road in Waltham, across from the National Archives.
Since a 5-watt fox can be heard from some distance, and since it is winter, I offer this clue: I reached the hiding place with less than a ½ mile walk from Elsie Turner Field. The fox makes transmissions on 147.54 MHz at approximately 1 minute intervals, mostly in voice, but some in Morse code. If you want to know a bit about what you are looking for, see http://w1mj.com/fox.
Good luck DE W1MJ