Re: My JHP 500 Tranceiver will receive but not transmit,...
It may have been PLL instead of PPL. If so, that stands for Phase-Locked Loop, and is the circuit that the transmitter needs to generate the desired frequency to transmit on. That being the case, there's no user remedy and the unit must be serviced by a qualified radio shop.
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Three things come to mind:
1) The radio is receiving, hence the light, but you may have a different PL code than the other radio and it is muting the transmission. Check your programming to be certain both radios are programmed alike. The red light indicates activity on your frequency.
2) Your radio may have a problem with the receive side of the radio or a bad speaker.
3) The transmitting radio may have a problem with transmit. This can be a sign of a bad battery. Swap batteries and see if the problem moves to the other radio. If so, replace the battery. (It takes more energy to transmit than to receive, so loss of transmit is common with a bad battery.)
The FT-1802 is a 50 watt 2 meter FM transceiver. It can transmit anywhere between 144 - 148 Mhz (the FM portion) of the 2 meter ham band. It can receive anywhere between 136 - 174 Mhz without any modifications. There is a modification to enable transmit "out of band" below:
There are few details about the results of this mod - typically these provide for transmitting on frequencies outside (above, below or both) of the 2 meter ham band. Transmitting outside of the ham band without a proper license for the frequencies in the U.S. is a violation of FCC rules.
A delay may be caused by interference from other radio sources. I heard of one case where a woman's cell phone call overpowered the transmit power of her baby monitor.
Other things that can cause interference or other receiver problems: 1. monitor in contact or close proximity to running appliances or their cords. (induced electromagnetic field) 2. neighbor with baby monitor on same channel ('cross-talk') 3. distance between transmitter and receiver too far (the strength of a radio signal fall dramatically over larger distances. think of how often you lose cell phone coverage) 4. reduced power: low battery strength or cooked power supply 5. transmitter or receiver insulated from signal (if your monitor was transmitting/receiving through any metal obstruction)
Yes. There used top be a download at www.jrcamerica.com but I can't find it now. I bought the required null modem cable, used the intended J-NAV LINK 2300 softaware and still got the ERROR msg. If you figure it out let me know, because loading waypints/routes is very timely.