There is worked and "worked". I keep getting this. If they solve your problem wonderful.
Others tried them and they didn't really help much compared to other devices.
In context they worked in that they were marginally better than the 2n3904s, but compared
to the 2n2222A or 2n2219 they were not very good. Compared to 2n3866 they were poor.
I went and bought some to test and they came from a reliable source (I don't use Ebay or aibaba)
and they were genuine Fairchild branded parts. All showed good beta/HFE but they didn't achieve
generally better power over bandwidth. They looked good on the curve tracer too. I used a few
for another project at lower power and they performed well there at 29mhz but I was only asking
them to deliver 50mW. The uBitx driver has to supply much more.
If you put them in, the radio will still work, but you will not get much improvement.