This guy may be able to help :D
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| AP73/GP68 help? http://www.interceptradio.com/bbs/viewtopic.php?f=20&t=4344 |
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| Author: | Wilrobnson [ Fri Jun 25, 2010 6:44 am ] |
| Post subject: | AP73/GP68 help? |
Anyone have any experience with this radio? One of mine (UHF model) is messing with my head. Even with a full battery, and any battery I choose to attach, it thinks that the batteries are low. After every transmission, I get the the 'low battery' chirp and "BATT" flashes on the display. Thoughts? |
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| Author: | Jim [ Fri Jun 25, 2010 6:54 am ] | ||
| Post subject: | Re: AP73/GP68 help? | ||
This guy may be able to help :D
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| Author: | SpudGunMan [ Fri Jun 25, 2010 8:39 am ] |
| Post subject: | Re: AP73/GP68 help? |
or this? you sure your batts good? you have a smart charger that will give you feedback on the charge to see if its still taking a full charge and discharge as spec? this is what I usehttp://www.rcuniverse.com/magazine/n ... ct_id=1644 |
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| Author: | Wilrobnson [ Fri Jun 25, 2010 9:02 am ] |
| Post subject: | Re: AP73/GP68 help? |
The batteries are good; I use them in other radios all the time. It's just the UHF model that's having a fit. |
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| Author: | Jim [ Fri Jun 25, 2010 9:17 am ] |
| Post subject: | Re: AP73/GP68 help? |
Found a few things... http://www.fixya.com/support/t1773001-m ... eeps_comes http://www.eham.net/reviews/detail/1295 |
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| Author: | the Outlaw [ Fri Jun 25, 2010 9:25 am ] |
| Post subject: | Re: AP73/GP68 help? |
They all do that. :chaingun: |
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| Author: | n7maq [ Fri Jun 25, 2010 7:48 pm ] |
| Post subject: | Re: AP73/GP68 help? |
the Outlaw wrote: They all do that. Did you read where he said Quote: The batteries are good; I use them in other radios all the time. It's just the UHF model that's having a fit. ?I have zero repair experience with the GP68's, but here is a few suggestion. The first thing I would do is clean the battery contacts, and terminals (they are gold so do not use any abrasive, or rubbing alcohol). If no joy with that then hook the radio up to a bench power supply and see what the current draw is and confirm that is within specs. Assuming it is a 7.2 volt battery pack you should not see over 2 amps at 7.5 volts in TX. If it is pulling more current than that then it is probably not the low battery waring circuit. If it is not pulling to much current then slowly lower the voltage as you TX (into a dummy load, or service monitor) and see where it gives you the low battery warning. If you have the RSS check to see if there is a low battery voltage adjustment in the service mode (if there is even a service mode in the RSS for this unit). If there is a low battery setting then hook it up to a bench power supply and set it according to the service manual specs. If no manual I would set it around 6.5 to 6.8 volts (assuming it is a 7.2 volt battery,). Most Motorola's like to have the low battery warning to come on with a voltage of about 1.1, or even 1.15 volts per cell, most other manufactures take it down to 1.0 volts per cell. Never set it below 1.0 volt per cell as that is a good way to ruin your battery pack. Feel free to drop me a PM if you have any more questions or need further help. Jim |
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| Author: | N7QOR [ Mon Jun 28, 2010 10:26 am ] |
| Post subject: | Re: AP73/GP68 help? |
I don't know these radios, but I do know another manufacturer uses a pin in gthe battery compartment to "sense" the difference between a standard batt and a AA/AAA pack. When the AA pack is in use, the radio is forced to low power. On the battery side, the plate that makes contact with the sense pin is held at minus VDC. Does this radio do anything like this? |
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