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#52
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N2EY wrote:
Leo writes: To propose that today would be quite difficult to justify - most folks never even take the cover off their radios anymore, let alone design one from scratch..... But some of us (ahem) *do* design them and build them from scratch. Amateur radio is probably the only radio service where a licensee can simply assemble a transmitter and put it on the air without any formal type-acceptance, approval or certification - at least here in the lower 50 provinces. Part 15 allows this as well, though I guess one could debate whether this qualifies as a "radio service": Sec. 15.23 Home-built devices. (a) Equipment authorization is not required for devices that are not marketed, are not constructed from a kit, and are built in quantities of five or less for personal use. (b) It is recognized that the individual builder of home-built equipment may not possess the means to perform the measurements for determining compliance with the regulations. In this case, the builder is expected to employ good engineering practices to meet the specified technical standards to the greatest extent practicable. The provisions of Sec. 15.5 apply to this equipment. Dennis Ferguson |
#53
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#54
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N2EY wrote:
(Dennis Ferguson) wrote determining compliance with the regulations. In this case, the builder is expected to employ good engineering practices to meet the specified technical standards to the greatest extent practicable. The provisions of Sec. 15.5 apply to this equipment. I'd say the provisions of Sec 15.5 are quite restricting, though.... It depends on the particulars of the application, and one's good luck, I guess, since 15.5's primary effect is to make it uncertain whether or not a Part 15 device will be (and will continue to be) usable. Given the bizzilions of Part 15 transceivers sold to people who seem happy with their purchase, however, it is clear that many have suffered no constraints from 15.5 which bother them. For some applications the probability of being constrained by 15.5 seems to be pretty small in practice. Note too that the ARS is also (though differently) constrained with respect to applications, particularly by 97.113 and 97.115. Whether the ARS restrictions or the Part 15 restrictions are more onerous depend a lot on what use you want to make of the devices you build. Dennis Ferguson |
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