F1EHN antenna tracking controller:

- my friend OH1JJC helped me to finally put together my two F1EHN EME tracking controllers

- here is photo of the card duo (156k)

- one (79k) is to be installed temporarily onto our 4 m dish for EME and radio astronomy experiments

- both assembled boards tested (93k) out OK

- all we need now is to install two 16 bit synchro/digital encoders to directly interface into the Windows softare

- the 4 m dish was renovated with two DC motors that can be now be relay controlled with this controller board

- later on, as time and money permits, the Viestikallio system can be upgraded with a solid state Linux-based control system