I’ve been using a 40A bridge rectifier as a volt dropper from my 4S LiPO’s to a FT857 for some years now . It works well.
There is a thread on the reflector discussing this matter. I enclose 2 photos just to give you an idea of my setup.
In reply to M0LMK:
Hello Matt,
I worked with my KX3 10 watt , battery a LIPO -Zippy 5000,20c-. I used 2 diodes (1N5401) serial to reduce the DC to 15,5 V. You can use 3 diodes.
The bridge is configured as follows to give a parallel/series arrangement of diodes, it seems to work.
DC + from battery is connected to the bridge - tag. The two AC tags are connected together. Output is taken from the bridge + tag.
Don’t forget that the output has to be connected to a load to realise a 1.5v drop. Input volts from the 4S LiPO is 16.3V. Receiver volts on other side of the bridge is 14.8V.