29.680 Mhz Ten Meter repeater

This repeater is a joint venture between Ronnie, N4KFI and myself, KB4REC. This is a split site repeater and may be periodically linked to the 444.525 repeater. The receiver is a GE Mastr II low band station and is located on Beaver Ridge in the North Knoxville, TN area (same site as 53.47 & 444.525 repeaters). The transmitter is 125 watt GE Mastr II Station as well. The transmitter site is located at N4KFI's site on Black Oak Ridge approx 3 miles east of the receiving site. There appears to be enough separation between the two sites and we have no desense. The transmitter is running approx 80 watts into a vertically polarized antenna up approx 50ft. The receiving antenna is temporarily connected to an inverted "V" antenna up about 20ft. Eventually we will install a vertical antenna on the top of the 90ft tower. The repeater was put on the air on May 27th 2012, and appears to be working fairly well. Please get on the repeater and help us test the performance.

As far as linking the 444.525 repeater to 10 meters. As per FCC regulations, this part of the ten meter band requires at least a General Class license to operate the 10 meter repeater. When 444.525 is linked to the 10 meter repeater, Technician class operators may have the opportunity to communicate through the 10 meter link, but only in the presence of a control operator. When the repeaters are linked, it is good practice to announce that you are via the KB4REC remote. The only time 444.525 repeater will be linked will be when either N4KFI or myself are monitoring thesystem so don't worry about any rule violations, because we won't let that happen.

According to the FCC rules/regulations this is permitted as long as the Technician class is transmitting in his authorized Technician bands. If a Technician transmits through the 444.525 repeater and it is linked to the 10 meter repeater, it is permitted when the repeater station is re-originating the 70cm transmission over 10 meters. The only requirement is that there must be a control operator with the appropriate 10 meter FM privileges. All that the Technician must be concerned about his own transmitting frequency, not where his output falls. Of course, a Techniciancan not transmit directly outside the 28.1-28.5 MHz segment.

What is an auxiliary station?-When an amateur station, such as a repeater, is remotely controlled over a radio link, there is another station involved--the station doing thecontrolling. This "control" station is, under the FCC rules, called an auxiliary station defined by the FCC as "An amateur station, other than a message forwarding system, that is transmitting commu­nications point-to-point within a system of cooperating amateur stations [97.3(a)(7)]."There are a few important rules that apply to auxiliary stations: 1) All amateurs, except Novices, may put auxiliary stations on the air [97.201(a)]. 2) An auxiliary station may transmit only on the 2 m and shorter wavelength bands, except the 144.0-144.5 MHz, 145.8-146.0 MHz,219-220 MHz, 222.00-222.15 MHz, 431-433 MHz, and 435-438 MHz segments. 3) When there is interference, licensees are equally responsible for solving the interference, except where one station is coordinated and the other is not [97.201(c)]. Control links should be coordinated. 4) An auxiliary station may, under certain circumstances, be automatically controlled and may send one-way transmissions [97.201(d), (e)].

KB4REC Repeater System Users Information

KB4REC Linked Repeater System
444.525 MHz +5 Mhz
PL 123.0 Hz
&
53.470 MHz – 1 MHz
PL 100.0 Hz

VHF Remote Base
Kenwood TM-271 - 60 Watt VHF 2 meter radio
Frequency Agile Remote Base - Which allows control operators to link to any 2 meter frequency.

The remote base remains offline most of the time, but is available upon request.

EchoLink Node#19024 in Knoxville, Tennessee. The repeater system is composed of two 100 watt GE Mastr II Stations connected to a ARCOM RC-210 3 port repeater controller and a CAT WX-250 Weather receiver with Specific Area Messaging (SAME) alert technology. This provides timely NOAA WX Alerts during Severe Weather. NOAA broadcasts are broadcast on both repeaters. (The WX receiver is Currently out of Service)

This is an open repeater system, and all are welcome to use it. Feel free to use this repeater as a normal repeater, but be prepared for someone from anywhere in the world to connect in the middle of your QSO via echolink, please welcome them in.
Email questions to kb4rec@arrl.net

Information about the repeater and how to use some of the many user functions on the Repeater controller. The repeater controller has DTMF decoder that allows a user to enter commands via the touch tone pad.

Tune to 444.5250 MHz (+ offset), PL 123.0 Hz or 53.470 MHz (- offset) PL 100 Hz. Listen before accessing the system since others may be using the repeater. If system is clear, push and hold your PTT button, then on your DTMF keypad enter a command (listed below), then release both buttons. The controller will play a confirmation message.

For Echolink operation see the ECHOLINK INFORMATION PAGE below

DTMF CODE DESCRIPTION
325 Temporarily disables PL Tone squelch for 10 minutes of inactivity. Useful for users that do not have CTCSS encode capablility or during band openings.
326 Enables PL Tone squelch
375 Digital Voice Recorder . Enter 375 release the PTT and it will respond with "ready" Key up your radio and speak into microphone. There is a maximum of 19 seconds of storage. When you release the PTT, the DVR will playback your audio. This is handy for testing your audio quality into the repeater's receiver.
85 Provides DTMF readback. Key radio PTT and hold then press 85 followed by the digits you wish to test. The repeater will read back the numbers you entered. This is handy for testing your DTMF tones to make sure your equipment is working properly.
400 Provides current time.
# Over rides DTMF muting (used to pass DTMF tones for echolink)
Additional user functions will be added soon.

Using Echolink on KB4REC repeater system

ECHOLINK SYSTEM INFORMATION

KB4REC Repeater System

444.525 MHz +5 Mhz
PL 123.0 Hz
&
53.470 MHz – 1 MHz
PL 100.0 Hz

EchoLink Node# 19024 Knoxville, Tennessee

You can connect to stations worldwide with just DTMF tones over your HT or mobile radio!

(See http://www.echolink.org to look up station node numbers.)

The KB4REC 6-m & 70-cm Repeaters are linked together on both 53.470 MHz (- offset) with PL of 100Hz and 444.5250 MHz (+ offset) with a PL of 123.0 Hz. This is an open repeater system, and all are welcome to use it. Feel free to use this repeater as a normal repeater, but be prepared for someone from anywhere in the world to connect in the middle of your QSO, and please welcome them in.

Below is some information about general commands and how to connect to other nodes using the KB4REC EchoLink repeaters: The repeater controller has DTMF muting enabled, so to pass your touch tones you must proceed all echolink commands with “# The controller will store your tones and then regenerate clean tones over the air for the echolink system.

Tune to 444.5250 MHz (+ offset), PL 123.0 Hz or 53.470 MHz (- offset) PL 100 Hz. Listen before accessing the system since others may be using the link. Push and hold your PTT button, then on your DTMF keypad push # * (pound star), then release both buttons, to determine if you are in range of the repeater. The repeater will transmit an identification message in response unless someone is connected. Send #08 (pound 08) to see if anyone is connected. If a station is connected, it will come back with the call, if not, you will hear "disconnected".

To test the quality of your signal into the repeater and quality of the EchoLink network connection, you may access a test station node (called ECHOTEST) by entering station node number #9999. We recommend that all new users try this test node the first time you try EchoLink to help you become familiar with system use. This node will repeat your transmission back to you so you can hear your transmission quality. Remember to press # # to disconnect when you are done.

To make a call, press in your push to talk and hold it while entering # followed by the node number of the person you wish to call or enter a code number from the list below.

DTMF CODE DESCRIPTION
# Node Number Enter the 4 to 6 digit Node Number that you'd like to connect to.
# # Once connected, this will Disconnect the link.
# * Station info. Will not play if a station is already connected.
# 00 Random connection to Computer User, Link or Repeater
# 01 Random connection to Link or Repeater
# 02 Random connection to Conference system
# 06 Node Number To check if target node is online
# 08 System Status
(You'll either hear 'disconnected' or 'connected to ...')
# 09 Reconnect to the last connected link.

When it is accepted by the gateway, listen for connection messages. The gateway will acknowledge when the connection is made. Monitor for other traffic because you might connect in the middle of a QSO. If the link is busy, it will say, "system is busy" and then it will disconnect. Let the carrier drop before you begin to talk. Just remember to wait about 2 seconds after keying before you start to talk. THIS TIMING IS VERY IMPORTANT TO SUCCESS. This is necessary due to delays in your radio, the repeater, and in the transmission over the internet. Remember that you are on the radio so use proper protocol. Please ID before accessing the system, and ID as normal (at least once per 10 minutes) during a QSO. To end the QSO, transmit # # then you should hear the "disconnected" message.

Sunday, March 1, 2009

Einstein's Theory on Radio

Einstein - "I am often asked how radio works. Well, you see, wire telegraphy is like a very long cat. You yank his tail in New York and he meows in Los Angeles. Do you understand this? Now, radio is exactly the same, except that there is no cat."


Attributed to Albert Einstein
borrowed from www.para.org.ph