RT-900 is not suitable for variable power output.
Added 2025-04-30 21:10:34 +0000 UTCSorry, we'll have to resort to Low/Med/High like the stock firmware. Not my fault, it's just badly designed.
The stock firmware uses the following strategy:
For Low Power: PA_Gain1=7, PA_Gain2=7
For Mid & High Power: PA_Gain1=2, PA_Gain2=7
The bias (0-255) is looked up from a table based on the frequency & Low/Mid/High setting.
So it looks like the stock firmware changes the PA_Gains based on the amount of output power requested. This makes it incompatible with a variable power output strategy.
Comments
Why does feedback get deleted when it doesn’t seem to agree with the developer’s opinion? I feel like I am dealing with a Mark Zuckerberg here. I back engineered this thing. Using seasoned professional knowledge and skills. I like the concept and the way you can use groups with this release but when you offer a professional opinion and advice and it gets instantly deleted. That’s counterproductive. I have a 900 working with nicsure running but I had to cut an etch and use a couple of jumpers to achieve this. Otherwise the approach thus far is like wagging the dog.
Ken
2025-05-06 17:17:02 +0000 UTCI did some power checks on stock RT900 and there was no where as more movement in power readings, stock power moved around by less than 1/10 a watt 5.60-5.70 gmrs on high power and low power. Now Vhf 144.000 high power was just like gmrs 1/10 watt, low power was too but noticed that would not go done to 1 watt even by changing numbers in factory RT900 rf adjust .
Stacy Poteet
2025-05-01 14:51:25 +0000 UTCDanke für die Info, das Gefühl habe ich auch das der Akku einen Fehler hat.
Rainer Heisser
2025-05-01 14:27:27 +0000 UTC
