On 1/14/2010 19:23, Mark Lloyd wrote:
[snip]


They had to buy all new equipment for the digital transition. You may
remember they ran their existing equipment on their old channels and
then added a complete set of equipment: transmitter, waveguides,
antennas, STL etc to transmit the "digital" signal while still keeping
the existing equipment in service.

For the stations around here, most of that was their existing backup
transmitter.

That would actually be an unusual situation because transmitters are
designed to operate on a specific channel. Plus purchasing new equipment
gave them a chance to buy much more reliable and power efficient equipment.