BFW10s very costly here in Mumbai too. My local supplier quoted Rs140. I am ordering two. On Thu, Feb 27, 2014 at 5:04 PM, Sandeep Lohia <sandeeplohia12@xxxxxxxxx>wrote: > all switching mixers are passive = DDVM... (no gain) but yes whistles > if not properly terminated. > also H-mode... > > active mixers = gilbert cell : NE612, Sa602, > MC xxxx, or more common TA7358 etc > > some experienced Ham informed me market is flooded with duplicate BEL > BFW10 now a days @ Rs 100/- each.. no output, or may be alian biasing. > > refrain those cloned with duplication, I carry a small magnet in purse > while visiting E-market... > > > > -- > http://www.lohiaelectronics.com/sandeep/mimima.htm > > --