315MHz like car systems? 497MHz? That does seem odd....what power level does it put out?
Jaime Solorza On Sat, Jun 30, 2018, 11:44 AM <[email protected]> wrote: > I have a horizontal directional drill. The drill bit transmitter (sonde) > talk to a receiver. They are pretty low frequencies, like 8 KHz or > something like that. Then the locator sends data to a remote indicator on > the machine. One of the antennas (the one on the remote indicator) was > messed up and one of my guys just put a random length of wire on it. Range > is not good. I told him I would figure this out and make a better > antenna. > > That is the easy part, I just swept the other good antenna and noted it > resonates at 479 MHz. Will make a sleeved dipole for it. > > But now I am wonder if I ought to be licensing this thing? > > I expected it to be in the 300 Mhz unlicensed band (316 or whatever it > is). Never thought it might be illegal until this morning. > FCC band plan shows the following for that frequency: > > Public Mobile (22) > Broadcast Radio (TV)(73) > LPTV, TV Translator/Booster (74G) > Low Power Auxiliary (74H) > Private Land Mobile (90) > > That is all licensed stuff. > > > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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