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I bought a euro Yaesu 991a . The vhf/uhf band plan is severely limited for use in the US . I have tried the button presses as shown for the earlier 991 and the service mode works to open the frequency for transmission but setting offsets etc are not possible . There must be a permanent fix because service mode shows than the unit can actually transmit on the US band plan. Any help would be appreciated

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    $\begingroup$ Hello Rocco, and welcome to ham.stackexchange.com! $\endgroup$ – rclocher3 Mar 30 at 0:12
  • $\begingroup$ Hello Rocco, I added europe and modification to your question, to increase the likelihood of a good answer. Hope you don't mind. :-) $\endgroup$ – Mike Waters Apr 1 at 16:02
  • $\begingroup$ Rocco, if an answer works for you, please click on the "check" mark next to the answer. This will remove the question from the "unanswered" list to improve house-keeping. If an answer does not work for you, please let us know so we can remove incorrect information. $\endgroup$ – Brian K1LI Apr 3 at 18:07
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This YouTube video says that pressing FAST + A/B + A+B during power-on puts the radio into Service Mode, allowing you to extend the transmit frequency range. You must follow the steps indicated in the video precisely; in particular, you must set the radio's transmit frequency to the range on which you want to transmit before putting the radio in Service Mode.

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