Repeater

 

 

Callsign: K2AA K2UK K2UK
Frequency/Offset: 145.290- 146.865- 442.350+
PL/CTCSS: 91.5 131.8 131.8

 
SJRA operates the K2AA Repeater (145.290 - PL 91.5) located in Medford, NJ, and the K2UK repeaters in Pine Hill, NJ. 
The repeaters are open for use without restriction to all licensed amateur operators.  
Weekly 2-meter repeater nets are held on the K2AA repeater every Monday night at 8PM.  
See the weekly nets page for more information. 

The former K2AA\R Icom IC-FR5000 repeater has recently been replaced with a 
YAESU DR-1X 144/430 Dual Band C4FM/FM Digital RepeaterThe repeater is currently configured for Auto/Auto Automatic Mode Select (AMS) mode to allow both analog and digital operation. 
The AMS function automatically recognizes a signal as C4FM digital or conventional FM, and then 
the DR-1X repeater retransmits the signal using the preset communications mode. 

Because this is a relatively new mode and the majority of our members do not have Digital C4FM Fusion capability yet, 
we decided for now, to turn the node off during morning and evening drive times: Mon-Fri  6:00am - 9:00am and 4:00pm - 6:30pm. 
Also, on Monday’s, during the evening net, the node will be turned off from 7:30pm – 9:30pm.​

The new K2AA\R digital repeater is also RF linked to an Internet connected Wires-X node! 

 

 

 

 


 

The South Jersey Radio Association repeater K2AA  is located on this water tower near Medford, NJ. The height of the water tower is 175 feet, providing nearly a 25-mile nominal range.

 

Tip:  If you are newly licensed, or new to VHF/UHF,or simply curious... click here to read an excellent primer on Repeater technology, etiquette, and FCC rules.

 

 

 

 

 

 

     
WIRES-X Operating Tips:

► The default Wires-X ROOM for our repeater is “K2AA”. This Room can be changed via radios with the WIRES-X feature set.

► After a period of 10 minutes of inactivity in another room, the node will automatically revert back to the “K2AA ROOM”.
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The Node ID’s are as follows:
    WIRES-X Node ID: 18219
    WIRES-X Room ID: 28219

PLEASE consult your radio’s user manual for additional details on using WIRES-X.

Some BEST Practices:

► Along with this NEW technology comes some NEW methods, or implementation of some older existing methods not previously used by ALL. Most notable will be the Digital QSO noise heard by those of you with standard analog radios. This will be most of you! To circumvent this noise you should set your Receive PL to 91.5 as the repeater will be using PL 91.5 on BOTH Receive and Transmit. Also, once you set the PL you will no longer hear the Digital noise so you won’t know if there’s someone using the repeater in the DIGITAL MODE unless you see there’s activity via the S-Meter on your radio. 

► When using the Digital nodes always leave a few seconds between Key-Ups for breaking stations or pending connections to go through.

► The K2AA Node is only a guest at it’s current location  and is subject to the same rules as other resident equipment. It may be TURNED OFF at a moment’s notice given Electrical storms, Power Failures, Vacations, irregular schedules, etc.….! So, if you can’t connect to the node, it may not be your fault!

 

 

 

Repeater equipment located at the site:

 

Here is the  YAESU DR-1X 144/430 Dual Band C4FM/FM Digital Repeater. The current setup is 25 watts @ 50% duty Cycle. The repeater receiver, transmitter and controller are all packaged into a 19” standard cabinet rack mount panel unit for simple replacement of our existing repeater. Existing peripheral devices such as the duplexer, filter and antenna remain the same. It's radius of coverage is at least 25 miles.

The Astron Power Supply, ICOM repeater and CAT-300 DXL Controller are disconnected - they were in service prior to the digital upgrade.

A DCI filter is installed in-line with the antenna.

Using a filter such as the DCI-146-4H can reduce interference, often totally eliminating it.

The DCI-146-4H filter consists of four helical resonators mounted in a very solid chassis with two coaxial cable connectors. Helical resonators can be thought of as very high-Q RFcircuits, passing only a very narrow band of signals. In the case of this particular unit, that passband range is 144 to 148 MHz. The skirts are quite steep and provide up to -62dBm reduction in signals outside of the filter's passband. The DCI filter is passive and requires no outside power source. You receive and transmit through it with power levels up to 200 watts.

This type of filter (very narrow passband) allows the receiver to be undisturbed by most out-of-band signals, providing for increased sensitivity and clearer reception.

The K2AA repeater antenna is a Commander 220-2N Omni located at the top of the Medford, NJ water tower at the end of Regency Lane in Medford, NJ

The feedline to the antenna is 1 ¼ Heliax hardline.

The repeater is located in the room within the base of the water tower.

The Duplexers are made up of 6 cavities…the manufacturer is unknown at this time.

The RF linked node is currently located in Atco and consists of an Wires-X HRI-200 controller, an FTM100 radio, a PC and a Diamond Vertical at 60'. The RF connection link is about 10 miles.

The Yaesu WIRES-X HRI-200 (Wide-coverage Internet Repeater Enhancement System) enables Internet to RF communications that expands the range of the K2AA\R repeater using internet enabled Voice-over-IP technology. With WIRES-X, a local station will be automatically connected to nodes and rooms via the Internet. No need to verify connection IDs or transmit cumbersome DTMF connection codes.

Information about nodes and rooms is exchanged via C4FM Digital signaling. Thanks to automatic reconnection to the previous contact, all you need to do is press PTT and start talking.

A Wires-X enabled radio can also search for new nodes and rooms, and initiate communication promptly when you find an ID that captures your interest.