NOTE: Hand soldered in batches & requires end user setup. Why would you want this amplifyer? The vhs-rf-amp-ADA4857 by Rene Wolf, is the latest and greatest in streamlining a FM RF archvial tap setup from VHS to Betacam decks, This PCB gives you a platform to easily optmise and adapt your RF tap allowing you to find optimal impendece for the source signal, so you draw just enough signal without affecting quality or internal functions of your VCR/VTR but have a clean amplifyed, and impedence matched source for use with CX Cards or even the MISRC/DomesDay Duplicator for very low signal decks. Thanks to duel ADA4857 chips it allows for Video & HiFi RF fixed amplifcation on one board or even use for duel video channel formats such as BetaCam.