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Re: one will not keep batteries
The unit is drawing too much power.
Take the unit apart and look for any resistors that are bubbled clean any contact points in the unit with contact cleaner or the highest pcnt rubbing alchohol you can find let the unit dry completely (hair Dryer etc() then try if it still fails. One of the components in the unit failed and I would recommend replacing it.
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We need to know what the handheld radio make and model is and we need to know what the same info is on the charger.. There are chargers that reduce the car voltage from 12 to 9, 6 4 etc, even if it fit the jack on the radio it can put the wrong voltage in or it can have different polarity.
1: The radio took a hit and broke the PCB or the connection to the RF out jack.
2: Some other PCB joint failure
3: The RF output IC is toast
4: The driver is toast
5: The tx oscillator is so far out of whack it cannot develop the frequency it is set to.
6: You have a bad cable or antenna connector
7: You have a bad battery, battery contact or power connection
8: You have a power supply or other problem
Are you programming the radio or did you buy it used? In the programming, a radio can be set for receive only. The other possibility is a bad battery. A battery has a huge draw on transmit and may not actually send a signal. Think of it like trying to start a car. I encounter this issue weekly. (poor battery) Post more information if you want me to help you. Such as: do you have the software, is it a fresh battery. How old is the radio. Let me know.
Typically most handheld radios have a range of 2 miles line-of-sight. However, obstacles between the two radios can significantly reduce range. On a cruise ship you may not be able to talk through multiple floors. To increase your range be certain to have fully charged or fresh batteries, and also hold the antenna upright, perpendicular to the earth.
What you need is at the VERY least is a Ni-Cd battery pack with 600mA/hr rating. We have an HH-300, with a configuration of 4AAx2.
Interstate Batteries has the BEST price I could find, although when we bought the HH-300, I sent it to SiTex for a new battery AND a tune-up which cost around $100. Here's the link to the Interstate battery website. <a href="http://www.interstatebatteries.com/cs_eStore/Products/RT/PID-NIC0068(Other+Products).aspx?dsNavigation=Ntk%7eSearchGroup%7cSitex+HH%2f-250%7c3%7c%2cNy%7eTrue%2cNtpc%7eDisabled%2cNs%7eproduct+Type%7c101%7c1%7c&Title=9.6V+800mAh+NiCd">http://www.interstatebatteries.com/cs_eStore/Products/RT/PID-NIC0068(Other+Products).aspx?dsNavigation=Ntk%7eSearchGroup%7cSitex+HH%2f-250%7c3%7c%2cNy%7eTrue%2cNtpc%7eDisabled%2cNs%7eproduct+Type%7c101%7c1%7c&Title=9.6V+800mAh+NiCd</a>
Hope this helps.
(EDIT) Do NOT forget that these radios are wired center pin negative! (Don't ask how I found this out...)
1. Remove battery.
2. Look for memory switch in the upper right hand corner
3. Sswitch this switch to the off position this should erase any settings that may be stored in the radio.
4. wait five minutes then turn switch back on and replace battery.
By keeping the PTT button pushed, if you get a rapid beep and the red led is blinking, sounds like a bad battery. Batt voltage is a nominal 7.5v. anything lower than 6.25v and the low battery beep starts. A rapid beep, and no red led blinking, an error in the transmit freq.