Zepler Amateur Radio Antennas: Difference between revisions
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This page details the plan to place Amateur Radio Antennas on Zepler (Building 59) in the summer of 2013, to coincide with roof access for replacement of SOWN-Zepler. | This page details the plan to place Amateur Radio Antennas on Zepler (Building 59) in the summer of 2013, to coincide with roof access for replacement of SOWN-Zepler. | ||
These antennas will be cabled to the Zepler Amateur Radio Equipment, probably in one of the server-rooms on the floor below. (Level 4) | These antennas will be cabled to the [[Zepler Amateur Radio Equipment]], probably in one of the server-rooms on the floor below. (Level 4) | ||
== Location == | == Location == | ||
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* 6/2/70 'white-stick' collinear antenna | * 6/2/70 'white-stick' collinear antenna | ||
* 23cm yagi - possibly a G8ADM slot-feed design. | * 23cm yagi - possibly a G8ADM slot-feed design. | ||
* ''spare slot for >=432MHz yagi or similar size'' | * ''spare slot for >=432MHz yagi or similar size antenna'' | ||
Both antennas will then be diplexed into a single coax feed before the preamp. | Both antennas will then be diplexed into a single coax feed before the preamp. | ||
Latest revision as of 11:13, 18 December 2012
This page details the plan to place Amateur Radio Antennas on Zepler (Building 59) in the summer of 2013, to coincide with roof access for replacement of SOWN-Zepler.
These antennas will be cabled to the Zepler Amateur Radio Equipment, probably in one of the server-rooms on the floor below. (Level 4)
Location
These antennas are intended to replace the SOWN obsolete 802.11a antenna, located on a piece of scaffolding attached to the wall of the Zepler Machine Room.
Antennas
- 6/2/70 'white-stick' collinear antenna
- 23cm yagi - possibly a G8ADM slot-feed design.
- spare slot for >=432MHz yagi or similar size antenna
Both antennas will then be diplexed into a single coax feed before the preamp.
- Preamp - possibly a G4DDK SPF Preamp (50MHz - 4GHz)
- Bias-switched Coax Relays for TX? - Must be good through 23cm
Requires one coax cable drop with DC bias for preamp+relay power.
Rotator
This is the original mast rotator recovered from SUSU (Building 42). Following a minor repair of the feedback pot, it is in working order. However a computer-control circuit must be built for this application.
- Controller possibilities
- 5 cable-cores required (3x AC, 2x feedback) to server-room
- or Mast-mounted controller with PoE for single low-current cable drop?
- Ice? Do we want a remote temperature sensor to warn/disable control below a certain temperature?
- With some thick wiring we could heat the rotator body for operation in cold conditions..
