HF Transceiver using NE612.

The inspiration for the project came after attending the  HamRadio 2000, Millenium Ham Meet @ Hyderabad (December 22, 23 & 24) where I met the Grand Masters like VU2NR and VU2RM OM Raju and OM Rao respectively. VU2NR's newest design the NR-80 inspired me on doing something with my NE612. Om Raju uses 5 NE612 in his project to produce a Dual Band HF Transceiver , which I felt was a waste. The technique employed in the 9Mhz SSB Generator Module from Mizuho Company , Japan impressed me and I decided to work on those lines. This technique uses a single SN76514 with a crystal oscillator to perform both function, as a product detector in the Rx chain and a modulator in the TX chain. I was now interested in replacing the SN76514 with the NE612 and trying it out. I searched the entire web for details on this chip (SN76514) but could only find that it is a double balanced modulator like the MC1496. I continued my search for data on this chip until one fine day I bumped into a Japanese site. JA6HIC "Toshi".

Block Diagram of the Transverter

Circuit Diagram of the Transverter.

Proposed Tuning Circuit for the Transverter.

Block Diagram of the SSB Generator using NE612

Circuit Diagram of the SSB Generator using NE612

   Acknowledgement in favor of Toshi, JA6HIC. Last revised: January 13, 2001 09:09.