Meanwhile, the GLF laboratory began testing various AM-FM table radios to determine which product would be carried in its farm supply stores. None of the existing models offered sufficient sensitivity to perform at all locations within the network's expected coverage area, so North American Philips was contracted to design a special high-sensitivity GLF-branded "farm radio" and serve as its OEM. Designated the GLF model F-770, the set was priced at $87.50 (more than $700 in 2005 dollars after adjustment for inflation), a considerable expense for many farm families in 1948. A $15 two-section outdoor "turnstile antenna", manufactured by the Technical Appliance Corporation (TACO) of Sherburne, NY, was offered as an accessory.