Radio and HD Listening

Iowa Public Radio strives to have the best on-air signals possible. We operate our transmitters at the Federal Communications Commission (FCC) licensed parameters for power, antenna configuration, and modulation. Each station has a different antenna height and power output, and can be located in very differing terrain - all of this adds up to a unique listening experience for each signal. Part of successfully listening to Iowa Public Radio is learning and knowing the intricacies of each signal. We've laid out a general guide below to help you improve reception and enjoy listening to Iowa Public Radio.

General Listening Tips:
Iowa Public Radio's engineers work hard to ensure our signals are transmitted in as high quality as possible. It is important to keep in mind, however, that radio broadcasting is a system that combines the performance of both the transmitter on our end and the receiver on your end. Here are some tips if you're experiencing difficulties listening to Iowa Public Radio:

  • Location of your radio - if you're experiencing interference or static, try moving your radio or radio's antenna. Depending on your location, our signal could be obstructed by other buildings or the landscape. If you're further away from our radio signal, these obstructions (and environmental changes) can have a bigger impact. Moving your radio or antenna may help clarify our signal.
  • Time of day - if you're listening to our AM signal and it suddenly disappears or you can't find it, that could be due to our operating requirements with the FCC. At sundown we reduce the power output from our AM signals in order to prevent interfering with other AM signals across the United States. As the seasons change and days get longer/shorter, the time we reduce power can be earlier or later. Similarly, the time we increase the power of our AM signals varies in the mornings based on sunrise and the season. If you'd like to continue listening to our programming during these times, we recommend you listen to our online News stream.
  • Quality of your radio can make a big difference - if you experience interference or static, try listening on a higher quality radio (we recommend the GE SuperRadio III). If that resolves the interference/static issue, you may want to consider purchasing one or two to replace your current radios.

HD Listening:
In addition to analog radio, Iowa Public Radio broadcasts programming on HD signals across the state. In general, HD offers a high quality signal that may be distinct of the content on the primary signal - so that you may listen to News/Studio One on WOI 90.1 FM HD-1 and Classical on WOI 90.1 HD-2.

You will need an HD radio receiver to listen to these signals. Here are two HD radio options:

Internet Radio Listening:
For information around internet radio listening and internet radio troubleshooting, please view our Online Listening page.

Other Radio Listening Issues:
Are you experiencing unusual reception issues while listening to Iowa Public Radio? Check to see if the signal you listen to is on the list below. If so, you'll see a brief explanation of what is happening to the signal and how long it is anticipated to take to repair/return to normal.

If the signal you listen to is not on this list and you feel it has a broadcast issue, e-mail us to let us know.

We're undergoing website maintenance this weekend, which may limit the availability of some of our digital content and listening options. The work is expected to continue about half of the weekend, starting at 8 pm Friday, October 12, and concluding late in the day Saturday, October 13.

While we complete the work, here's a list of alternative and emergency options for you:

IPR's Mason City stations (1010 AM and 90.7 FM) are temporarily off the air for maintenance. Both should be back online by 1:00 or 1:30 this afternoon.

UPDATE: KNSC returned to air at 9:53am.

KNSC is off the air temporarily for tower maintenance.

In the meantime, you can continue listening to IPR on 640 WOI AM or the web stream.

Broadcast Alert - WOI-FM 90.1 Outage

Sep 11, 2018

WOI-FM 90.1, IPR News & Studio One in Des Moines/Ames, will be operating at reduced power and may be off-air at times. A tower crew is working on the broadcast tower, and WOI-FM must be off or reduced in power for the safety of the climbing crew.

We apologize for the inconvenience, and we appreciate your patience during these outages. Other ways to hear your favorite programming found on WOI-FM during the day: