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I have read most of what you posted. Replace D70 with the correct 5.1 volt zener diode, the finals and look very carefully around the ceramic disc capacitors between the finals and the antenna connection at the rear edge. You may find arcing from a possible lightning strike. I have fixed 4-...
There is a post on accessing the service menu to adjust the audio limits. This is almost identical to the anytone 5555. I will try to find the post and link it here when I get a chance.
I concur with the assessment of Retevis customer service is awesome. There is an overnight delay in response to emails because of their location. In reviewing the 10 meter radio they gave away in December I found their products to be pretty good. And would recommend them. A friend and I are...
This Retevis Ailunce HS4 is straight forward and easy to operate. The menu system is explained very well in the user manual. All user settings are digital. I found some info on the service menus also. Similar to the Anytone radios. Before adjusting got 40 peak watts on LP-100A and decent audio...
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