| 122 GHz Transverter from VK3CV/WQ1S - improved version from SP team with external reference input Schemat - DD1US |
| 122 GHz Transverter from VK3CV/WQ1S - improved version from SP team with external reference input - DD1US http://www.dd1us.de/Downloads/122G_003_Ext_Ref_10MHz_Schematic_mod-SP.pdf |