Purpose
- Operate LEO and MEO sattelites
- main focus
- Operate terrestrial stations in contest/DX
- limited power
- collocated to 70cm relais DB0NJ in FM and DMR
- Experiment with
- polarization horiztal, vertical, LHCP, RHCP
- compare to 2m/6m beam
- (later) RX preamp
- (later) TX high power
Radios
| Make & Model | Yaesu FT-857D by DL0RUS |
| Expectation | no modifications or known issues |
| CAT control & audio data | SignalLink USB from IC-756proIII make up wire harness, sockets available |
| Microphone | MH-31 stock, working |
| Power | stock sockets, working |
| Make & Model | Yaesu FT-857D by DL1XMW |
| Expectation | Mic modulation known bad |
| CAT control & audio data | Yaesu SCU-17, Cat Cable CT62 working |
| Microphone | MH-31 incomplete Mod M0UKD |
| Power | XT-60 connectior maybe shared with other radio |
next steps:
- Verify against R&S CMA180
- Voice SSB, Voice FM, Data SSB, Data FM (packet)
- RX sensitivity on speaker jack and data out
- TX on Mic and data in, output power
- Complete Mic mod on Radio #2
- Decide on power supply
- Determine DC power consumtion on 2m@50W and 70cm@25W
- option1: share one for both radios, expect full duplex, but not SO2R
- option2: bring extra PSU, temporarily solutions available
Antenna
| 2m X-Quad w/ polarization switch | assembled |
| 2m X-Quad w/ polarization switch | assembled |
| GFK Boom 2m x 50mm | ordered |
| Mast | arrived |
| concrete tiles | Chris |
| HF- and Control Cables | arrived |
| Elevation rotor and control Emotator | arrived, repaired many thanks DOK C12 |
| Azimut rotor and control Emotator, two candidates | thanks DOK C12 mechanically ok, add grease, updates indication drive needs to be replaced |
| Local Operation | Rotors: have working control boxes Polarisation: require PoC switchboard |
| Remote operation | Rotors: decide on USB interface or DIY control box Polarisation: some DIY arduino box |
Next steps
- Design
- Determine position of rotors
- upper bearing for azimut rotor?
- join azimut and elvation rotor on top of mast
- Control box to control polarisation (optional rotors) from NodeRed
- Determine position of rotors
- Order
- USB interface for rotors
- components for control boxes
- controller interfaces
- Build
- Polarization cables
- PoC switchboard for polarization (connectors, power supply from TRX)
- Assemble mast
- concrete tiles
- rotors
- boom
- polarization switches
- cables
- antennas
Console
| PC | shared w/ QO-100 |
| Software | gpredict packet radio modems virtual audio cable Log4OM Win-Test |
| Dashboard | Tab next to HF and QO-100 mains power switch for TRX and rotator |
Next steps
- Set up PC
- Set up dashboard