This development could not have
come at a worse time! I had just embarked on a campaign to find
additional transmitter sites in downtown areas of the Nashoba Valley
and North Central Massachusetts, having sent proposals to building
owners in Concord, West Concord, and Fitchburg, plus a contact in Ayer,
with letters of inquiry to Groton and Pepperell waiting in the wings,
when all of I sudden at work I discover a new signal on the car radio
at 1700 kHz, just after sundown, coming in loud and clear. I knew
instantly it was bad news. Here is my commentary about it posted on part15.us.
For
the past 10 years, the last thing most of us Part 15 broadcasters using
the expanded AM band worried about was new, full powered, licensed
stations from within our own national borders coming on our frequencies
and blowing us away. Only the occasional new station authorized by the
CRTC in Canada was of any concern. The FCC stopped approving of both
moves into the expanded band and new stations coming on there many
years ago now. So this move of WRCR, formerly a 500 watt station on
1300 kHz with a deteriorating transmitting infrastructure, is totally
unprecedented on the part of the FCC and has grave implications for the
future and stability of Part 15 broadcasting in the expanded AM band.
In
the hours and days ahead, there may be a few interruptions in both
Troubadour 1700's AM and FM signals as I work through a few issues
spawned by this development. Although Part 15 transmitters have come a
long way in recent years, a $225 transmitter still cannot match a
$20,000 transmitter's accuracy and stability. I am going to try to
lessen the "motor boating" effect that occurs when the two signals
collide, which my SSTran AMT-5000 transmitters enable me to do. Also,
the FM antenna has still not been precisely trimmed for 97.9 mHz. It's
a job I have put off for more than two years. (It is still trimmed for
89.3.) With no AM reception at night beyond a thousand feet, it is
imperative that the FM's signal is maximized. This will require the FM
to go off air for several hours.
As a postscript, night time
reception of Troubadour 1700 AM in the mid-Horsepond Road and North
Shirley/Bull Run Restaurant neighborhoods, where the signals from WRCR
and Troubadour 1700 arrive at a near 90 degree angle from each other,
may still be possible on home radios and portables with internal loop
antennas. Turn the radio to see if we are still heard in the null of
WRCR.
No comments:
Post a Comment