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   AMATEUR_RADIO      Ham radio for when Armageddon strikes      2,531 messages   

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   Message 1,244 of 2,531   
   Holger Granholm to Richard Menedetter   
   Conversion up or down?   
   02 Sep 16 09:41:00   
   
   In a message on Friday 09-01-16 Richard Menedetter said to Holger   
   Granholm:   
      
   Good day Richard,   
      
   RM> An Upconverter is needed to convert a lower frequency signal to a   
   RM> higher frequency signal.   
      
   OTOH, a downconverter is needed if I want to use my FT-290 VHF (144 MHz)   
   transceiver to send on the HF (SW) bands. That is what my 'Tokyo HI-Power   
   VHF>>HF Transverter' does.   
      
   IOW, converting the 144 MHz signal to for example 14 MHz.   
      
   RM> See also the descritpion for the Ham-it-up upconverter:   
      
   RM> It seems that the convention is the other way around.   
      
   You are actually converting down the receiving frequency band to be able   
   to receive frequencies below the 25-1300 MHz band, that the thumb-stick   
   is designed to receive.   
      
   Yes it seems that the Ham-it-up that you are referring to, has got the   
   convention on the back foot.   
      
   In all my life as a HF-VHF-UHF-SHF ham, I have built converters to be   
   able to receive VUSHF, on for ex. 28 MHz.   
      
   That is downconverting, ie. converting the 144 MHz signals to 28 MHz.   
      
   When I wanted to use my Drake TR-4 transceiver to transmit on 144 MHz,   
   I needed an upconverter.   
      
   So, finally it all depends upon from which viewpoint you look at it.   
      
      
   Regards,   
      
   Holger   
      
   ---   
    þ MR/2 2.30 þ And on the 8th day God said, "OK Murphy, you take over"   
    * Origin: Coming to you from the Sunny Aland Islands. (2:20/228)   

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