|
Posted by John Davis on December 29, 2025 at 18:29:32.
In Reply to: Origin of 1750 m? posted by Robert H on December 27, 2025 at 21:38:14.
|
As Bruce very correctly says in his inquiry about SDRs, the origins of the alternative provisions for 160-190 kHz are lost in the mists of regulatory history, somewhere around (possibly even pre-dating) WW II. No one person or group was responsible (although some hams who had fallen back on carrier current operation during the wartime shutdown were supportive of the action), nor was there necessarily any specific "original intent." One often reads comments about remote-control garage door openers and such, but c'mon...who's gonna carry a 1 W tube rig and a 50 foot spool of wire around in their shirt pocket just to open their garage? There were no transistors, ICs, or even lithium batteries around when those rules were promulgated, after all. More logical to assume the idea was to give experimenters who had neither the resources nor inclination to apply for a formal experimental license some slivers of spectrum with suitable rules where they could safely do their thing with little risk of causing interference to licensed services. The FCC explicitly stated as much re: 1750 meters in the LF ham rulemaking effort circa 2009, citing this very website for examples.
|
Follow Ups:
|