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radios:dr-m06th [2026/01/07 15:24] – [Test data] m0mzfradios:dr-m06th [2026/01/08 00:02] (current) g5rkt
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 The PA puts out ~20W and can be adjusted using VR1. The deviation is adjusted with VR2 and is set ~5KHz from the factory. On receive it's (apparently) very selective & sensitive, and the second IF filter is 20KHz wide so this TRX might even work on wider bandwidth modes. Using an IC-705 as a reference receiver the wideband PLL phase noise looks to be very low and there are no horrendous key-up transients a-la FT-1500M. The PA puts out ~20W and can be adjusted using VR1. The deviation is adjusted with VR2 and is set ~5KHz from the factory. On receive it's (apparently) very selective & sensitive, and the second IF filter is 20KHz wide so this TRX might even work on wider bandwidth modes. Using an IC-705 as a reference receiver the wideband PLL phase noise looks to be very low and there are no horrendous key-up transients a-la FT-1500M.
  
-After tapping the discriminator modulator the radio was bench tested using an 857D and a pair of NinoTNCs; it works on 4k8 IL2Pc beautifully. The main issue with testing was those Aerial Facilities dummy loads are **superb** at 50MHz!+After tapping the discriminator modulator the radio was bench tested using an 857D and a pair of NinoTNCs; it works on 4k8 IL2Pc beautifully. The main issue with testing was those Aerial Facilities dummy loads are **superb** at 50MHz!
  
 As we're using +/-2.5k deviation for these modes I also replaced the first IF crystal and second IF ceramic filters to try to squeeze every last fraction of a dB out of our links. As we're using +/-2.5k deviation for these modes I also replaced the first IF crystal and second IF ceramic filters to try to squeeze every last fraction of a dB out of our links.
radios/dr-m06th.txt · Last modified: by g5rkt