Paradan Radio Antenna Disconnect
Reduce the chance of station equipment damage from lightning or static charges.
The Antenna Disconnect automatically disconnects the antenna from your radio and grounds the antenna. It prevents static-discharge, surges, and lightning-strike effects from damaging your radio and associated equipment.
The Antenna Disconnect Actuator is installed at the output from your transceiver, power amplifier, or antenna tuner in line with the antenna’s feedline. When the transceiver is turned OFF, the antenna’s signal and ground wires are shorted together and grounded, and both the coax center and coax ground are disconnected from the radio. When the transceiver is powered ON, the Actuator re-connects the antenna for normal operating AUTOMATICALLY.
12 Volt power for the Actuator comes from the transceiver. Simply plug the control cable into the transceiver’s auxiliary power socket, and turn the radio on to operate. For those radios without an auxiliary power socket, connect the control cable to the radio’s power supply, and turn it on to operate.
If you wish to leave the power supply on, or if your radio does not have an auxillary 12 volt socket/terminal, then a separate unit, the optional Radio ON Sensor/Detector, ($89.95), unit is required. The Radio On Sensor/Detector is placed in series with radio’s 12 volt power wire. PLEASE SEE PHOTO ABOVE AND THE DESCRIPTION BELOW AND SPECIFY ABOVE RIGHT TO ADD TO CART IF YOU NEED THIS OPTION.
Specifications For The Antenna Disconnect Unit:
1. Operating Voltage: 10-18 Volts dc
2. Current: 60 mA when turned ON to connect antenna
3. LED: Illuminates green when relays connect the antenna
4. Relays: Two relays with 15 Amp contacts, protected for reverse spikes
5. Case: Grounded to antenna’s and Isolated from radio’s coaxial connector
6. Control Wire: Two-conductor AWG 18 with RCA phono plug
7. Control Input: Diode protected against reverse polarity. RF filtered.
8. Active Lightning Protection: Gas Discharge Tube on antenna coax input
9. Case Ground Stud: One-quarter inch with washers, lock washer and nut
10. Case: Die-cast aluminum, black paint, white print, water resistant
11. Size: 4.8 x 2.6 x 1.6 in., mtg. tabs w/4 holes @ 5.25 and 1.5 in. centers
12. Weight: 13 oz., 390 grams
RADIO ON SENSOR/DETECTOR:
The Radio ON Sensor determines if the transceiver has been turned ON and, if so, it provides power to switch the Antenna Disconnect Actuator. The Radio ON Sensor is needed if the associated transceiver does not have a 12 volt power output terminal or socket, and you wish to keep your transceiver’s power supply turned on.
The Radio ON Sensor is placed in series with the transceiver’s power wire. The connectors allow easy hook up to most power supplies and radio power cables. The Sensor comes with 3-way banana binding posts, ¼ inch ring terminals, and a jumper with Powerpoles.
Current sensing is accomplished by its unique method of using a fuse for the sense element. Different value fuses allow the ON-Sensor to work with all radio’s, QRP to QRO.
Radio On Sensor/Detector Specifications:
1. Operating Voltage: 10 to 16 Volts dc
2. Current: 10 mA Quiescent, 60 mA when Activator is powered ON
3. Current Sensing Resistor: Fuse, 40, 25 or 10 Amp ATCO fuse
4. Maximum Pass Current: 30 Amperes
5. Input Connector: #12 AWG Wire with Powerpoles or ¼ inch ring terms
6. Output Connector: 4-way 30 A binding Posts (wires, banana, ring, spade) Includes a 6-inch jumper #12 AWG wire
7. Actuator Connector: RCA Phono socket
8. LED: Illuminates green when supplying power for switching Actuator.
9. Case: Aluminum, painted black, white screen printing
10. Size: 4 x 3 x 1 in., four mounting holes @ 4.5 and 2.5 centers
11. Weight: 6.5 oz., 200 grams
The winning article for the July 2021 QST Cover Plaque award is “A Sensitive Field Strength Meter for Foxhunting,” by Woody White, KZ4AK. The QST Cove... Read more
Friday and Saturday, August 6 – 7, Russian cosmonauts onboard the International Space Station (ISS) will transmit slow-scan television (SSTV) images f... Read more
Tad Cook, K7RA, Seattle, reports: Solar activity slowed this week, with the average daily sunspot number declining from 48.9 last week to 33.9 this we... Read more
WL2XUP is an FCC Part 5 Experimental station operated by Lin Holcomb, NI4Y, in Georgia. It’s licensed to operate with up to 400 W effective radiated p... Read more
“Chinese radios have come a long way, many have impressive feature lists, but those features seem to be stuck behind programming or poorly imple... Read more
“We are sorry to announce that Icom has discontinued the IC-7851 HF All Band Transceiver. Since its launch six years ago, the IC-7851 has been I... Read more
Russian cosmonauts on the International Space Station (ISS) are planning to transmit Slow Scan TV images on 145.800 MHz FM using the SSTV mode PD-120.... Read more
Olympic Games – JA1TOKYOOn July 16 JARL opened the special commemorative station ‘JA1 TOKYO‘ in Nishitokyo City, Tokyo, to commemora... Read more
A judge in the Massachusetts Land Court has ruled that the Zoning Board of Appeals in the City of Framingham “erred” in revoking a building permit for... Read more
Reports suggest that jamming stations have been deployed on the lower portion of 40 meters. The jamming appears to be coming from Cuba. The signals, s... Read more