Yaesu have finally released the hardware upgrade for the FT-991. There has been lots of rumours and speculations regarding the cost of upgrading the radio to the same spec as the newer FT-991A.
Martyn Lynch and sons have now got the hardware upgrade listed on their website
The cost of the upgrade is a whooping £480! Personally I won’t be paying out to upgrade my 991 as the only real benefit would be the real time band scope. But for those interested can click here for more information