| Home |
| Search |
| Today's Posts |
|
#17
March 18th 07, 11:53 AM
posted to rec.radio.amateur.boatanchors
|
|||
|
|||
CB History WAS Johnson Ranger 1 date of manufacture. Demise of Ham 11 meters
In article ,
Jon Teske wrote: On Wed, 14 Mar 2007 13:54:04 +0000 (UTC), (Geoffrey S. Mendelson) wrote: Scott Dorsey wrote: Not at all. It just mandates a certain power input to the finals. At one time it DID mandate something like "local communications only". I can't remember the exact wording, so I leave it in quotes. Note that Class D wasn't all there was. There was Class C which allowed pulse modulation in the 26 MHz range for remote control, and Class A citizens band which was AM in the 450 MHz range. I don't recall what Class B was. I had a class C and D license. The difference was ticking a box on the application. Geoff. Since I never operated CB except for one short contact in my carpool mate's car to show him how it worked, I was not intimately familiar with CB rules. I seem to remember thought that there were regulation which prohibited even attempting to make a contact of over 200 miles this was one of the ways to attempt to rein in the use of powerful (or so) even if conditions permitted this. I can confirm the existance of 'distace' restriction. As I recall, it is 150 mi., not 200. I seem to remember that amplifiers that many CBers used (of course the prohibition of the sale of amps capable of operation in that range, including those intended for ham use, was another FCC mandate.) Anyone know more about that?? Note: the amps were illegal regardless, as there was a limit of watts of power in to the final amp, and a maximum of 4 watts RF energy out. It is worth noting that when 'skip' conditions were right, it did not take large amounts of RF to reach long distaces. I used an '11 meter' (but _not_ 'citizens band') rig with just under 2-1/8 watts (measured!) RF out, and one day was asked to shut down, by a station nearly 900 miles distant. I was _so_strong_ in their area that legal max (10 watt RF) stations couldn't communicate at 6 blocks distance. I don't know the licensing requirements, but I think that there is also a frequency or frequencies at 72 MHZ available for radio control of models in addition to 26MHz; and, 50 MHz if one is a licensed amateur. Anyone up on that? "way back when", there was 2nd set of frequenceis, besides the 11m ones for RC controls. I don't remember at this remove (roughly 30 years) just where it was. Was not used much, gear was much more expensive. And yes, there were some ham frequencies where RC operations were allowed. |
| Thread Tools | Search this Thread |
| Display Modes | |
|
|
Similar Threads
|
||||
| Thread | Forum | |||
| Date of manufacture for CB radio | CB | |||
| Date of manufacture for CB radio | Policy | |||
| Johnson Ranger | Equipment | |||
| Johnson Ranger | Equipment | |||
| FS: E.F. Johnson Ranger | Boatanchors | |||
Threaded Mode
