Discovery Disclosed
Posted on October 20, 2012
Right at the gate let me say, don’t break the part 15 rules, not even given the means of doing so.
Right at the gate let me say, don’t break the part 15 rules, not even given the means of doing so.
What I am about to disclose will give owners of Wholehouse 2.0 located in the United States to go over the speed limit, and I say again, don’t do it.
I’ve done it, but only for test purposes so I’d have information to share in this posting. It was very brief, and I concealed all the clues.
It all started when I was trying to stabilize the FM signal between the Wholehouse 2.0 and two AM transmitters in different parts of the building, which got their audio feeds from FM radios. I had a long running blog which attracted plenty of good advice, and I solved the problem by very exact antenna placements.
But in the process of all that testing, I found the little round sticker hidden in the battery compartment. I also have instinct, just like kc8gpd said he has, and I sensed that something interesting was under that sticker. I had a pretty good idea what I’d find.
After all, the Wholehouse 2.0 is certified for use in both the U.S. and Canada, and that could only be true if the transmitter had two settings.
The small switch under the sticker provides the two settings.
Following are field strength readings taken with the TECSUN PL-310 radio, showing the comparative difference between U.S. power level and Canadian.
U.S. Field strength at 10-feet from the FM transmitting antenna: 40dBu
Canadian F.S. at 10-feet from the FM transmitting antenna: 60dBu
U.S. F.S. at 100-feet: 04dBu
Canadian F.S. at 100-feet: 11dBu
Even though the Wholehouse 2.0 is located indoors, I receive it well on the auto radio for more than two blocks.
But the main thing is I got my system to work properly using the U.S. setting.
If you try this, promise me you will be in Canada at the time, or I will rescind this posting.
