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© 2018 – DL4ZAO – Status: Preliminary  v010 

Seite 9 

 
Measurements undertaken – Transmission loss and Reflexion loss 
 

 

 
Scale:  

 

Transmission (blue) – 1dB/Div 

 

 

Reflexion (red) 10dB/Div 

 

 

Frequency  (horizontal Axis) 5kHz to 150MHz, 15MHz/Div   

 

 

Disclaimer 

The ADS Antenna-Disconnect-Switch is a supplementary protection device to 
protect the station against high-voltage events that are induced by nearby 
lightning strikes. It may not be sufficient to act as a lightning arrestor during a 
direct lightning strike. It does not replace a professional antenna lightning 
protection system as required in the national electrical codes and standards 
applicable in your country. Each operator or owner of a station is fully 
responsible on its own to comply with his country specific rules for antenna 
lightning protection and safety earth. Any liability in this context is explicit 
excluded. 
 

 
 
Copyright 

©

 2018, Guenter Fred Mandel, all rights reserved 

 

 

Содержание Antenna-Disconnect-Switch

Страница 1: ...ntroduction 2 Functional diagram 2 Electrical characteristics 2 FUNCTIONAL DESCRIPTION AND OPERATING GUIDELINES 3 Power Supply 3 REMOTE OFF Input 3 Installation 4 Earth ground connection 4 Circuit Diagram 4 Connections 5 ASSEMBLY INSTRUCTIONS 5 Component layout diagram 5 Activation Methods 8 Measurements undertaken Transmission loss and Reflexion loss 8 Disclaimer 9 Copyright 9 Parts List 10 ...

Страница 2: ...ction is essential See chapter ground earth connection for details Functional diagram Electrical characteristics Supply activation voltage DC 10 18 Volt Operating current typ 75 mA when activated connected at 12V Supply voltage RF Connectors female SO239 UHF coaxial socket Antenna Socket fully isolated against case RX TX socket braid connected to case Supply connector 2 pole screw terminal twin co...

Страница 3: ...the grounded metal case Green LED display ist off Learn more about the various operating conditions in Chapter Activation Methods Transmit operation Under specific conditions with highly mismatched antennas and high VSWR standing wave voltage maxima could be high enough to trigger the Gas Discharge Tube This may occur only when using high power and non resonant antennas with extreme VSWR Power Sup...

Страница 4: ...emote supply voltage will be short circuited to ground Earth ground connection To provide effective protection the ADS requires a direct conduction path with sufficient diameter to an suitable earth ground point Earth ground is tied either to the ground stud of the ADS or via the flange cover of the box mounted on a thick metal plate which needs to wired to the ground earth system An effective sta...

Страница 5: ... DL4ZAO Status Preliminary v010 Seite 5 Connections ASSEMBLY INSTRUCTIONS Component layout diagram Distances given in mm 25 4 mm 1 inch TO ANTENNA FROM RADIO Remote OFF earth ground stud DC supply cable 10 18V ...

Страница 6: ...wo 2mm AWG 16 bolts and nuts Use two 6mm 3 16 inch long metallic spacer sleeves suited for the screws to provide sufficient clearance between pcb and the bottom of the metal box The nuts and bolt connection builds the main conductive path between the ground layer of the printed circuit board and the grounded aluminum case Wiring of the connectors To wire the rf connectors to the corresponding pads...

Страница 7: ...ack with Pad K5 on the pcb The connection between the isolated Remote OFF RCA Phono Plug and the pcb is done by a 2 pole pin header K4 Use short pieces of red black litz wire to connect the RCA Socket with the 2 pole female connector and plug it to the pin header K4 Take care of the correct polarity plus red should connect to the inner conductor and minus black must connect to the braid outer cond...

Страница 8: ...Wire the RED wire to plus and the BLACK to common For radios that do not have an accessory supply output connect the ADS Supply cable directly to the power supply When the Power Supply is turned ON the ADS connects the antenna to the radio equipment The Remote OFF switching input remotely deactivates the ADS despite during DC supply is powered The function can triggered manually or by an automated...

Страница 9: ...t are induced by nearby lightning strikes It may not be sufficient to act as a lightning arrestor during a direct lightning strike It does not replace a professional antenna lightning protection system as required in the national electrical codes and standards applicable in your country Each operator or owner of a station is fully responsible on its own to comply with his country specific rules fo...

Страница 10: ... pF ceramic capacitor high voltage type 3KV RM5mm labelled as 4 7pF 3KV 4 2 D1 D2 Diode 1N4007 5 1 D3 LED green 5mm 6 4 K1 K2 K5 K6 Solder Pad on PCB No component pad on pcb 7 1 K3 Screw terminal 2 pol Pitch 5mm 8 1 K4 2 pol Pin Header set with plug and cable 9 1 R1 47K 10 1 R2 2 7K 11 1 R3 2 7K 12 2 RLY1 RLY2 Relay 12V Finder 41 61 9 12V 13 1 T1 MOSFET BS170 14 1 X1 Gas discharge tube GDT Bourns ...

Страница 11: ...rommet 5mm 18 1m Power Cable Twin core flexible lead red black 19 1 Buchse Remote OFF RCA Cinch for isolated assembly 20 Miscellaneous mechanical parts Screws and washers M4 USA 8 UNC 6mm distance sleeves 21 Antenna Socket Isolation Set PE washer bushing insulator 22 1 Ground stud 23 1 Throug Hole Plated Printed Circuit Board 24 1 Aluminum die cast box flanged Hammond 1590BSFL ...

Страница 12: ...ADS 2018 DL4ZAO Status Preliminary v010 Seite 12 ...

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