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Showing posts from April 28, 2018


Found back my old  PYE PF2 UB    pocket  70cm portofoon  produced 1970 --75 Once used in our local DX  warning net  432.775  433.525 back in the  previous millennium  80 ties Still worked after all the years.  Portofone  is huge compared with modern sets 0.5W - 0.8W  out There is a PYE museum web-page Interesting to look at the well  designed Technics inside It comes from Cambridge so it is good beyond doubt ... Extreme power / battery efficient   RX/standby  pulsing 1-2mA  duty cycle 10%  at 13.6V The TX takes only 160mA  at  500mW out  at this point it can beat  modern devices. The Battery voltage is 15V   it can safely work on  motor bike or car power  voltage  13.6V  and plus Featuring an economizer circuit  that is a pulsing  supply for RX   duty cycle 10% to check for incoming signals. Once a signal is detected the RX will turn100% on I know the old Icom IC2E 144 FM device  being also very power efficient   but t


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