Click on the image to see the dashboard TGIF Means (Thank God It's Friday). TGIF net started on a analog repeater in west central Florida. It was handed down to robert around the year 2015 and grew to over 50 check ins. A small group of them went to D-Star after the repeater was taken down and then moved over to DMR where we started the TGIF net again. It then moved to the Brandmeister system and has now found its final home as the mothership of the TGIF Network. TGIF Network was started in October, 2018 by Robert (K4WZV) and Mitch (EA7KDO). They started the TGIF Network with just one talkgroup which became 31665, and about 5 Amateur Radio Operators joined the Network, at this time the system was running on a Raspberry pi. Later on, Ty (KG5RKI) came on board to help improve the hblink code it was currently running on and move it to a cloud server, then later rewrote the backend to make what was called Callmgr. Michael (K5MRE) and Andy (G7LRR) also joined the team and created many of the features we enjoy on the website and plenty more behind the scene. Over the course of the next year, the network quickly grew from just a few hundred users to just under 5,500. The network now is home to around 776 active talkgroups available for all to use. The main/original talkgroup is original 31665, and is sometimes referred to as the 'Mothership' by many. All Amateur Radio Operators are welcome to join and try out what the network offers. The Network is still growing rapidly. Recently, Pi-Star and Shark RF Openspot added the TGIF Network to their list of networks. But this tale has not ended. Around the end of 2019, Ty (KG5RKI) could see limitations to how far Legacy would be able to scale with the growing number of clients. So, Ty took it upon himself to once again use his coding skills and knowledge of digital networking and in his spare time rewrite and design a network from the roots up which was codenamed 'Prime' and was open do beta testers during development. With Andy (G7LRR) as his partner in crime against the code, and Rob (K4WZV) having his back, the team is making fast progress at creating a great solution for ham radio operators around the world.

Click on the image to see the dashboard The full form of NXDN is Narrowband Digital Exchange. It is defined by two main organizations viz. Icom Incorporated and Kenwood Corporation. It operates in VHF/UHF frequency bands and uses FDMA technology. Following are the specifications of NXDN. • NXDN offers clear voice quality with minimal background noise and interference. • NXDN offers secure communication through its digital encryption capabilities. • NXDN operates on either a 12.5 kHz channel or a 6.25 kHz channel bandwidth. It allows single carrier on one channel at a time. • NXDN supports multi-site trunking which enables seamless communication over a wide area by interconnecting multiple base stations. • NXDN supports data applications such as text messaging, telemetry, status monitoring and GPS location tracking. • NXDN offers better coverage and extends range compared to analog radio systems. • Some NXDN systems support roaming capabilities. • Many NXDN radios support both digital and analog modes which facilitates a smooth transition from analog to digital systems.

Stable broadband connection with provided speed up to 10 Gbps. Actual server connection speed to the internet. The provided connection to the main server (hellas-frn.ddns.net) reaches 10 Gbit/s and in practice 7.9 Gbit/s with measurements through the modem-router. The connection speed through the server reaches 1Gbps, basically due to hardware limitation. Of course, a change in the server's hardware, so that the actual connection speed increases to, for example, 5 Gbit/s or the maximum provided, is not considered necessary at the moment, due to the fact that the full use of the Hellas-FRN network does not "load" the server so that such a solution is required. The above connection conditions result in information on the network having ZERO data packet losses, ZERO errors in the connection line and by extension an almost unlimited number of simultaneously connected users on the server without any problem. Its physical location (and connection) is Geneva's Champel in Switzerland. Reserve server For seamless coverage of communications through the Hellas FRN server runs concurrently 24-hour backup (hellasfrn.ddns.net) with a speed of 100 Mbps, (fiber), with physical location and connection in Athens, Greece. The forecast is to take over for short periods of time (hence the much slower connection speed compared to the main server), the continuity of the normal server's operations if there is a problem with it. The takeover of the backup server for some minutes or hours (and in previous real event for days) is not even noticed by the users except at the moment of the transition, while during the operation of the backup server an indication is provided to the user program that the backup is working. (Yellow triangle with an exclamation mark at the bottom left of the program window). There is also the possibility of manually connecting to the servers by users by putting one of two names. Note that the mobility of all users will be on the server that is normally connected. The two names of these have a slight difference in the name which is the hyphen (-) between hellas and frn. The connection transfer between the two servers is done through the alternative system manager (DE), where the relationship between the two DDNS addresses is registered. Attention: This automation does not apply to GRN accounts. There the backup server should be selected or typed with a corresponding action to restore to the main server when it comes back into operation.

Hellas-Node Network. Διαχείριση ραδιοερασιτεχνικών ψηφιακών και αναλογικών δικτύων. This website refers to digital and analog networks of amateur radio applications and is in the process of continuous updating and upgrading, after being renamed to hellas-node.net. The hellas-frn network and all its pre-existing structure is included in this website as one of the supported analog communication systems, with revised management of communication rooms and in other analog networks. Recent Visits

The original System Manager has been completely inactive since January 2024. There is no information on its coming back.

Content Submission Terms Before you can submit your review or other user generated content, you must (a) read through this Consumer Ratings and Reviews Agreement and (b) indicate your assent by checking the box at the base of the agreement. General Requirements This agreement ("Agreement") governs your conduct, your rights, and Hellas-FRN rights with respect to any submissions you make associated with the Consumer Ratings and Review Services and/or other social media services used by Hellas-FRN. When you submit a Submission, you agree to the following: all content that you submit is accurate; your Submission is original and was created by you; Hellas-FRN use of the Submission you upload does not violate the terms of this Agreement and will not cause injury to any person or entity; Your Submission will be made without any prior payment or promise of payment having been made to you or the expectation by you of any payment in return for your proposed Submission. 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Click on the image to proceed Click on the image to proceed DVSwitch is a Client-Server application for Amateur Radio Digital Voice. This provides a "Server" application running on a Raspberry Pi (RPi) or other Linux platform. It can also be installed on a cloud server with Linux. The server application is distributed as an RPi image with all features and functions installed. Therefore, there is no need to download additional modules or programs or install them yourself on a Raspberry Pi. There are two clients available for DVSwitch. One is Android and it is available in the Google App Store to display almost any type of Android device. In addition to this there is also the python USRP Client (pyUC) which is available for use on Windows, Linux or Mac. DVSwitch supports all current Digital Voice functions without any additional hardware, except for D-Star. For the D-Star, an external vocoder circuit is used, such as the Northwest Digital ThumbDV dongle. For other functions, the Vocoder software included with DVSwitch provides high-quality sound, and while DVSwitch has been around for a long time, it was somewhat complicated to set up and mostly used by deep computer geeks. But with this version, an average radio amateur can get it up and running in less than 10 minutes. This release provides many new features, including the ability to change functions dynamically, customize Talk Groups, rooms and repeaters, either from the server or the client, and dynamically switch between DMR networks such as Brandmeister, TGIF, QRM etc.

HAM1 HAM1 HAM1 HAM1 HAM2 HAM2 HAM2 HAM2 HAM1 HAM1 HAM1 HAM1 HAM2 HAM2 HAM2 HAM2 HAM3 HAM3 HAM3 HAM3 HAM4 HAM4 HAM4 HAM4

Free projects are only for private use and not for commercial use. U-Ham Group have all the rights on all these free projects and could make changes at any time without any prior notice, so be updated frequently. User can use the projects at his own risk. Temperature dependent fan speed controller Schematic Features fan controller Adjustable start point Voltage operating range: 9v-15v Maximum temperature sensor cable length 1 meter LED indicator light for fan operation -------------------------------------------------- ------- It concerns a simple circuit to control the speed of a cooling fan based on the temperature measured by a temperature sensor (thermistor) placed at a suitable point on the P/D to "read" as closely as possible the output temperature of the machine. It is of course recommended to use a quality thermal paste for more reliable results. The whole circuit is designed on the property of the thermistor to change its internal resistance depending on the temperature change in its body. This one is of negative temperature coefficient -Negative Temperature Coefficient or otherwise NTC, which reduces its resistance as the temperature rises. This causes the mosfet Q1 to trig proportionally to its gate and by extension to affect the voltage of the fan and make it increase revolutions proportionally. There is a voltage threshold above which the fan starts to spin and in which the setting of VR1 plays a decisive role which creates a voltage divider and beyond that the revolutions depend proportionally on the temperature affecting the thermistor. The reverse also applies in case of a decrease in temperature. How to adjust the temperature sensor. Locate the VR1 regulator. Connect the voltage 13.8VDC and the fan as in the photo. Press the sensor with two fingers and with a screwdriver adjust VR1 until the fan is ready to start and the LED just starts to light up. Normally, this setting causes the fan to start slowly as the temperature reaches about 36°C and then increase the fan speed as the temperature rises. The opposite happens when the temperature drops and below 36°C the fan slows down until the falling voltage level cannot keep it spinning. Turn VR1 until the fan is at such a speed that it keeps the temperature at the level you want and if you want to change it from the set 36°C. Place the fan far enough away from the P/W heatsink that it will be effective, but not so close that it touches, as the reflected airflow comes back through the fan body and cancels the flow itself. Linkage (Applies to off-the-shelf device) Watch out for any mistakes especially in the position and polarity of the 13.8VDC wiring. The subpoenas can be seen in the photo. PCB The board was designed to match the specific plastic box