See comments in eham.net
FrontEnd Limiter – FEL
The FEL is a PCB board where you can assemble the components to build a 6x receiver antenna switch, 6x bandpass filters from 10 to 160m and a limiter to protect the receiver.
It was designed by Imanol EC2DX, Jose Ramon EA7KW, Juanma EA5RS & Pablo EA4TX and since 2017 we are using this FEL at out contest stations.
This is a special version based on the ARS-USB that was re-designed to be used as a rotor controller (or replacement) by Prosistel rotators (or any rotor that use multi-turn potentiometer). It includes the same features as the standard ARS-USB but new extras as:
- Soft start and stop via a PWM. It allows to have a soft starting/stopping ramp.
- It detects if the potentiometer is out of range and will prevent any accidental problem with the antenna coax. Any problem with the potentiometer is detected.
- It will check when the rotation motion is activated, that the rotor feedback position changes.
- If the motor is jammed by any reason, an alarm will be displayed and the appointment will stop. The user will be noticed.
All those watch-dog systems (and some more included) will prevent to generate a problem if the potentiometer is damaged by any cause (any wire broken, moisture, a wrong cable connection, etc).
The antenna Switch AS2x2 is a 2 Input Ports into 2 Outputs Ports, usefull for a contest station where you have a Main Radio (RUN) and a Multiplier Station (Inband) at the same band. In this way, the RUN station uses the main antenna(s) while the Inband station is looking for new multipliers or QSOs and uses an RX antenna located far from the main antenna. As soon as the Inband station passes to TX, the switch AS2x2 inverts the antennas, passing the Inband station to use the Main antenna while the RUN does not run out of antenna put to use the antenna of RX.
The AS2x2 can be connected between the RUN Radio and the Linear Amplifier (in case a Amplifier is used) and between the Inband Radio and the RX antenna. As soon as the Inband Radio activates the PTT the AS2x2 will exchange the outputs, so the Inband will use the Linear Amplifier and the RX antenna will be assigned into the RUN Radio.
The AS2x2 can be used combined with the Interlock 5R so in this case, the Interlock 5R will control automatically the antenna switching.
RemoteBoxUniversal Antenna controller that can be connected with most antenna switchs for remote or automatic control. Example of Antenna Switchs supported:130,00€ – 170,00€ Select options
- SixPack (2×6)
- SJ2W (1×6 and 2×6)
- microHAM (Six Switch, Switch Double Six, ..)
- RemoteQTH (1x6, 2x6),
- DX Engineering (DXE-RR8B-HP, DXE-RR8B-SD, DXE-RR2X8B )
- Ameritron RCS-10
ARS-USB Rotor Controller
The ARS-USB (Antenna Rotator System) is the easiest and highest performance Universal Interface for handling your Antenna Rotor. You’ll be able to control your Antenna Rotor from your computer. Connecting the ARS-USB to your PC via a USB Port and later to your Rotator is easy. Within a few minutes, you will be able to point your antennas from your computer automatically.
There are 2 models available:
- Azimuth (1 motor)
- Azimuth & Elevation (2 motors)
So order the model according to your preferences.
ARS-Shield PCBThe ARS-Shield is a board that can be plugged on a Arduino adding the capability to interface with a rotor. It’s compatible with K3NG rotator controller. The ARS-Shield PCB doesn't include components neither the Arduino module. As an option you have also available an enclosure with LCD and 4 keys buttons: www.ea4tx.com/products-page/ars-shield/ars-shield-pcb-enclosure-lcd-4-buttons-2/20,00€ – 95,00€ Select options
W8TN’s blogSome application ideas that Clark W8TN has available in your Blog and you can visit at: https://w8tn.blogspot.com.es/ In one of its inputs explains how to
Antenna Switch 2×2
Antenna SwitchsWe have just added 2 remote antenna switchs models to our product list: AS1x6: Remote antenna switch for 6 antennas y 1 output AS2x6: Remote