ECHOLINK PROJECT 440MHZ 35 W

KC2CWN-L begins with a Compact, 2 ele. 2 meter Quad "The BUTTERFLY" 7 + dbi gain at 145 MHz F/B > 21dB Full Band < 2:1SWR 1/4W, 72 ohm Matching Cable 16"
boom, 21" Turn Radius Simple "TEE" Mount Weight 1.5 lbs. All fiberglass construction. Either Vertical or Horizontal Polarit at approximately 10 feet, connected to a antenna
tuner , Ameritron 310 G 100 Watt Linear Amplifier , and a ICOM T2h Handheld . The antenna is pointed directly at the State University of Binghamton in NY , a ULI board ,
a CSI 800 Interconnect, connected to a computer running an 2.44 Ghz Celeron and 1GB RAM, Cyber Power UPS provides uninterrupted power.   My Internet connection is
100Mps broadband aDSL from VERIZON. Note: The signal is 40 OVER in the State University

The Software:

KC2CWN-L is Controlled by a Secured Remote Control Station Terminal program VNC that operates on a local intranet network . All commands are issued from the
remote terminal including all system maintenance functions.

Please let me know if you encounter any problems or have any comments
about using KC2CWN-L EchoLink.

Martin Stratton
KC2CWN

The EchoLink Web Site
The ULI Board Web Site
The VNC Web Site
EchoSked info
Compact, 2 ele. 2 meter Quad

Poject 1: BLOCK DIAGRAM COS (Carrier Operated Squelch ) input to the CSI 800 autopatch
will have a circuit added to it so that during Echolink operation the COS is hard wired between the ULI PTT output and the COS input of the
CSI 800 Reverse Autopatch. Note the 146.505 signal itself is transmitted during reverse autopatch so that other station operators can
simultaneously communicate directly with the KC2CWN-L Echolink Link. Experiment 1 Connect RJ 45 PTT negative swing output directly to
CSI 800 COS input , making sure it does not interfere with the Transistor Biased  output of the ICOM 2AT COS , both must function independently.
If the above does not work then perform Experiment 2: Design circuit mod that will convert the ULI PTT relay closure to a negative swing voltage,
the PTT output from the ULI is biased with a resistor and it is being used by an ICOM T2H for Echolink output. . Note the COS from the
ICOM 2AT is already connected to a 2N4401 40 VCE NPN small signal amp 300 Hfe (Beta) transistor because it is used to interface the
ICOM 2AT COS. The Output of the ICOM 2AT COS is a positive swing voltage and it needed to be converted to a negative swing voltage for the
CSI 800. The ICOM 2AT is used for receiving COS only. The new circuit will present a COS signal to the CSI 800 when either the ICOM 2AT has a
COS voltage present or the ULI board presents a PTT contact closure. Also note: The ULI RJ 45 connector has its PTT available, TX MIC,
COR IN, and MAIN RX unavailable because the individual jack connectors are being used. The RJ 45 ULI PTT is the only connector wired differently .
Pros: This will act as a fail-safe in case the 100 W linear malfunctions , and goes off-line. The Echolink Reverse Autopatch system can be reset and
the Reverse autopatch will stay on-line. Rare intermittent audio cut-out occurrs during reverse Autopatch.

The November 22nd '07 Weekly Portable Reverse Autopatch Echolink Experiments:

It is important to remember that the ULI and Echolink are in the VOX mode . Also all codes are being transmitted via the serial cable eliminating any conflict especially
when connected to the Echolink Audio Test server. good example: www EchoLink SysOp Mode good example: www Activity Reminder . If you defeat the 2.2 Activity
timer place a call hang up and call back again in less than 90 seconds the CS-800 activity timer will still be counting down, because it has not been re-set.
Note: There is a ULI board PTT output that is connected directly to a small resistor interface that is coupled with ULI TX MIC audio out , wich is connected to the
ICOM T2H handheld.

The CSI 800 internal repeater controller was turned off because it wouldhave been a FCC violation to operate in cross band repeater mode across my future UHF operating
frequencies ( delta_sx project 2008 TX 433.025 pwr 13 WATTS , RX 446.1 ) , and only Simplex halfduplex communication is permitted with this set-up. The repeater
controller was also turned off because the output transmitter from the CSI is a Mobile Alinco DR 570 . It puts out 5 W on 446.1 it gets very hot when it is in continuous transmit.
The repeater by design wouldhave re-transmitted the audio continuously from both sides of the radio Reverse autopatch contact directly to the DR 570 and it would be
destroyed. If the retransmission had been allowed there wouldhave been an endless ping pong effect when the Echolink Audio test server is activated. See BLOCK DIAGRAM
above.

Anticipating a time out problem with the ULI the station OP at the cell phone end will simply have to issue the reconnect 09 command, should the Echolink operator become
long winded , this is convenient because it is done during the same Cell call. It can be done during the same call as long as the CSI timer is set correctly. The CSI 800 timer
works both ways, it will not time out unless the mic side is keyed (COS signal is received ) also it will not time out after the call until the time out timer has lapsed.

Currently the CSI 800 system is in the SEMI PRIVATE mode. The goal is to set a convenient time for the CSI 800 time out timer, not too long and not too short. The same
goes for the ULI timer . Regardless of what the timer setting is for the CSI 800 the ULI should be set to 180 seconds. CSI 800 Timer register 2.3 is the maximum
call limit time. The time is equal to .5 minutes (30 seconds) times the number you enter..

Once the register 2.2. Activity Timer setting = 10 sec , then the first call is made to the Reverse autopatch and the 9999 DTMF command is sent to the CSI from there it is
passed to the ULI and then via serial port to the Echolink program. The following audio test messages are read out loud: "This is K C 2 C W N accessing the reverse
autopatch(PAUSE) " (Press 9 9 9 9 on the cell phone key pad) (pause and wait for the echolink server message to complete ) then read out :"KC2CWN performing
and Echolink test server audio test on the KC2CWN Echolink link". It might be necessary to adjust the SYSOP to disable CALL sign, announce connects, disconnects,
and muting . Since the CSI 800 is set to Morse code identification at beginning and end of transmission.

Note: Setting the 2.2. Activity Timer setting = 99 sec will also effect the Echolink DTMF 031 command . It takes 45 seconds to Process a Random Favorite link connect
command. It will cause an audio malfunction on the Echolink side. As long as the 08 link activity command or script command [ 1 ] or [2 ] are issued during the 031 silent
interval the connection will be made , but the resulting audio confirming the connection will never be heard. My experience shows that the 031 Random Favorites
command is the only command that really works when portable and targeting friends from inside a library of Amateur Radio Station operators. My experiment to use a
PDA with all the node numbers fed into it for that particular day, time , and speed dial the nodes one after another until successful connection is established failed on
10 occasions that I can remember. On many occasions I plowed through 20 speed dials and not a single one of the stations in the list were present. Then Another
malfunction surfaces on the standard autopatch side , CS-800 is expecting a signal that is not there. Solution The Echolink Link Terminal Program is to be keyed by
cell phone stn op manually by causing rf activity with either the station ID script command every 20-30 seconds or so to avoid allowing autopatch time-out during pre-contact
operations.

The TEALPOINT Web Site

The February '08 Portable Wireless Network Card, Echolink project:

This device will not be used until the September project has been completed.

This is the type of used Mini Laptop system that will be replace the previous Tower
system that had its mother board destroyed.
The Laptop will have Linux or Knoppix on it and it will drive the QTEL OPERATING SYSTEM .
Open Source code from SOURCE FORGE . The minimum Processor speed will be 385 mHz.
The minilaptop maximum width of 15 inches wide, maximum depth of 10 inches , maximum thickness of
2 inches,AND USB PORT .
The Wireless Network Card, can use local WIFI and can connect at speeds UP TO 100 MBS.
More than fast enough for Echolink Voip.
The Laptop has a small 4-10 gb drive and that will be more than sufficient for the KNOPPIX
OR LINUX Operating Systems.
When at home the system will be connected to the ULI as described in the Block Diagram

The September '08 Echolink 440 Mhz 35 W Tranceiver, Link project:

The link will be used as part of a daily exercise program when walking
to and from work at the STATE University. A small ICOM IC W32A
will be used to acess and control the link.

Project 4: BLOCK DIAGRAM

This is the type of Sensitive 440 Mhz ICOM IC-U82 Handheld
Transceiver that will be used on the local 440 Mhz link.
Has SMA connector.
- Output: UHF ; 5W Power
UHF (400-479MHz)
This is the type of 440 Mhz UHF 35 W Mirage bd 35 Linear .
that will be used on the local 440 Mhz link.
5 Watt in = 35W out.


Close up view of DTMF Interface .
that will be used to send high speed DTMF to the local 440 Mhz link.




view of DTMF piggyback Interface .
that will be used to send high speed DTMF to the local 440 Mhz link.




view of DTMF piggyback Interface .
that will be used to send high speed DTMF to the local 440 Mhz link.




view of DTMF piggyback HIDDEN MIC JACK EMPHASIZED .
that will be used to send high speed DTMF to the local 440 Mhz link.




view of UHF TUNER . that will be used to IMPROVE RECEIVING OF high speed DTMF to the local 440 Mhz link.




END view of UHF Homebrew 6 element 10db Antenna .





Close Up view of UHF SPACERS Homebrew 6 element 10db Antenna .





Side view of UHF Homebrew 6 element 10db Antenna .

The August 2009 Delta SX UHF project DOWNLOAD:

Poject 6: DELTA SX UHF DOWNLOAD

730 PM Tuesday Week 2 Echolink Experiment.

[ ] Muting interface

The KC2CWN-L QsoNet Project   QsoNet is a Virtual Ionosphere for Amateur Radio KC2CWN Repeater and QsoNet Internet Linking System OUT 146.505 / IN 446.1- 131.8Hz pl HAAM Group adds a QSOnet Sched That is at 9:00 AM Pacific; 12:00 noon Eastern on 21.350 on the QSOnet dial. This is a VOIP Internet connection. Some call it "pseudo-net". We stop promptly at 25 min after the hour - five minutes before HF net startup to give time for us to shift over to regular HF. see http://www.qsonet.com for details of how QSOnet works. It is something like Echolink, but easier by far to set up (for me, that is). Some of those now showing up irregularly are: K6LX, VE1GAB, VE4KS, WA8TGS, KD0TL, W8ATA, Advantage: we can all clearly hear and work each other using the "Internet ether" for propagation. If it might appeal to you, come on over and give it a try. Most say initially that it isn't real radio, but they become converts pretty fast. Robert B K6LX Equipment 2: 1 Receiver 1 Transmitter 2 Antennas 1 ULI computer-to-rig interface 2 Windows Computers w/ soundcards 1 EchoLink PC Software 1 EchoStation PC Software Procedure 2: Two Computers (T.A.R.A. click here for Two Soundcards procedure) The two transceivers will have different functions. One will act as a transmitter, and the other a receiver. The receiver will receive all transmissions on the repeater input frequency and that signal will be sent to both PC computers via audio cable. One PC will send the signal over the internet using QsoNet for internet users to receive. The other PC will send the signal to the transmitter using EchoStation. The radio transmitter will transmit that signal on the repeater output frequency for radio users to receive. The signal coming from the internet links will also be sent to the radio transmitter. The ULI interface will be connected to the transmitter will allow both computers to control the transmitter's PTT function. SEE FIGURE BELOW. T.A.R.A. Original Circuit. Station KC2CWN-L      21.350 on the QSOnet dial        446.1Mhz      131.8 tone      out 146.505Mhz EchoStation Settings Value Description Receiver and Master Volume Max Receiver: Sets the level for audio coming from the receiver (or transceiver). This slider controls the volume of the sound-card device and port you selected in the Receiver section of the Devices tab (see below ). For example, this might control the level of the line-in jack on your sound card. Adjust this level if the receiver audio is too soft or noisy, or seems to be over-driving the sound card. Must be returned to original value { SET VOL PLAYBACK = 90% FROM 0 TO 6 } before returning to Echolink. MIC Booster ON Receiver: Sets the level for audio coming from the receiver (or transceiver). This slider controls the volume of the sound-card device and port you selected in the Receiver section of the Devices tab (see below ). For example, this might control the level of the line-in jack on your sound card. Adjust this level if the receiver audio is too soft or noisy, or seems to be over-driving the sound card. Must be returned to original value { SET MIC BOOSTER = OFF } before returning to Echolink. VOX Delay: short If you are using VOX control for the receiver, this slider sets the VOX delay. This is the time between loss of audio signal and drop of carrier detect. Note that this is not the same as the repeater "hang" time. The range of values is 0 (to the far left) and 2 seconds (to the far right). Normally, this should be set to a very short delay. If the VOX level is properly adjusted, this can usually be set to 0. VOX Level: 80% If you are using VOX control for the receiver, this slider sets the peak audio level at which EchoStation's VOX is triggered. Move the slider to the left to decrease the level, or move it to the right to increase it. To set the VOX level, be sure the receiver is squelched, move the slider all the way to the left, then move the slider slowly to the right until the green "Busy" light in the System Status box goes out. Max transmission time: 175 Sets the maximum allowable time for a received signal. This configures a timer begins running each time a received signal begins. For a duplex repeater, a common setting is 180 seconds (3 minutes). Tail timer: 2 Sets the "hang time" for the repeater. This setting applies differently for Duplex and Simplex modes: In Duplex mode, this controls how long EchoStation waits after the end of a received signal before turning off the transmitter. Typical settings are 5 to 10 seconds. QSONET RIG Settings Analog Clock Value 9:00 - 3:00 Description MIC GAIN 9:00 Set to avoid over driving audio going to QSONET VOIP MIC Booster OFF Transmitter: Set to avoid over driving audio going to QSONET VOIP OPEN RIG Mixer audio output SLIDER BAR NOT AF-GAIN DIAL Carefully set slider to 1.20 Set to low to activate RIG VOX and DWELL. Must also be kept low to present a low audio signal for Echostation VOX.   [ Trip '08 Home Page]