On May 17, 8:23*pm, "Brenda Ann" wrote:

= S N I P =

- Nearly 100% of AM HD stations have commercials.
- And since the OP seemed to be referring primarily to AM HD...

BAD,

Nearly Yes -but- Technically Not 100% since there are
the National Public Radio (NPR) Station and the so-called
Public Radio Stations -aka- Non-Commercial Radio
Stations as a 'group' and they are as a group part of the
Early Adapters of IBOC and FM "HD" Radio with the
speciffic intent to be HD-2 Second Audio Channel
Broardcasters to better serve 'their' Listeners.
http://www.kpbs.org/radio/myrland_digital_radio
* NPR Radio Station List
http://www.npr.org/stations/pdf/nprstations.pdf

Point-of-Fact - KOAL-AM 550 kHz in Portland, Oregon
is a "Commercial Free" National Public Radio Station.

Here are a few more "Commercial Free" National
Public Radio Stations (NPR) on the AM Radio Band
From the NPR Radio Station List
http://www.npr.org/stations/pdf/nprstations.pdf
* WILL-AM 580 kHz from the UOI in Urbana, IL
* WNYC-AM 820 kHz New York Public Radio
* WNED-AM 970 kHz in Buffalo NY
* WGVU-AM 850 kHz in Muskegon, MI
* WOUB-AM 1340 kHz in Athens, OH
* WXXI-AM 1370 kHz in Rochester, NY
* WSUI-AM 910 kHz in Iowa City, IA
* KOPT-AM 1600 kHz in Eugene, OR
Note - The State of Alaska has 8 NPR AM Radio Stations.

Remember the Primary Intent of IBOC and "HD" Radio
is it use and application in the FM Radio Band; and
Public Radio Stations are a major broadcaster on the
FM Radio Band.

-but- Even on a Non-Commercial Public Radio Station
you will still hear about there 'corporate underwriters'.