The RFX95 circuit includes final amplifier stage and low pass filter. The RFX95 is your choice for 10 meter radio repairs and upgrades. It doesn't replace the final stage, it adds to it so it can be switched ON or OFF and can be bipassed.
 
The RFX95HD circuit includes only the final amplifier stage and low pass filter which makes for a quicker and easier installation in some units. The RFX95HD is your choice for 10 meter radio upgrades when the final transistor is good and intact and if you want to have the 95 in or out of line (on/off).