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1  Buenos dias por favor me podrian facilitar el manual de usuario en español de la RT8. Muchas gracias.
Sorry, Currently we haven't RT8 Spanish manual, other anything questions,please feel free to contact us
2  mein RT8 ist VHF also im 136.00000 Bereich wo bekomme ich denn die Antenne für denn 400-480MHz Bereich
Your RT8 is VHF frequency band, even if adjust other antennas also can't communicate with RT24, because the antenna just is strength communication distance
3  Is the firmware update still aviable my firmware isD003.008 and cp ver vo1.30 can not find update
Hello Paul, What's wrong with your RT8? The situation is if the firmware is not well-operated ,the radio will easily die completely, it'll be a useless radio. Then the radio should be back to China Factory to be fixed. But kindly note customer will afford all the shipping cost. So if the radio has been used normally, we don't suggest any update on it . Just please you know the risk in advance.In addition, relative blog for your reference:http://blog.retevis.com/firmware-update-rt3-rt8/ for getting the step, and getting you radio version. Thanks.
4  Dear Retevis Team, I love your Digital Radios very much. After I´ve got my RT3 i bought another RT8 too. With the RT8 i have a Problem: Sometimes it Shows the Volume changing bar without touching the Volume knob. Software: S013.032 CP V01.32 My Question: Is it a Software Bug or a Hardware defect? 73´s DL8BJ
It may the trouble of potentiometer inside the radio , if you can not fix it by yourself , please find your seller to help send back to factory to repair .