SDR-Kits does not sell fake transistors. We have supplied thousands of genuine transistors since we first started the business in 2008.

Please note that due to a change of die-factory in Japan in 2017/2018, Mitsubishi changed the partnumber from RD15HVF1-101 (which shows the Mitsubishi Logo) to RD15HVF1-501 (which is shown in the product photo and no longer shows the Logo).   

Both RD15HVF1-501 and RD15HVF1-101 have identical performance!    

Any RD15HVF1devices showing the Mitsubishi Logo is either OLD Stock or is a Fake    
you can verify this by checking with some of the larger Mitsubishi authorized distributors (ie  rfparts in US or Anglia in the UK)