HiFER Beacon Project (Phase 1&2)
This will be an on going project.
* Transmitter
* Microcontroller Board
* Antenna
* Solar/Wind Power Supply
* Systems Integration and Testing
* Site locations and Permissions
* System Installation and Verification
* Announcement
1. Here we are performing some initial testing to see what will be needed to get up and running on the 22meter band.
1A. Above is the LPF (low pass filter) built and used for initial testing. (Below) this is the CW transmitter under test.
2. Here we have quickly moving into Phase 2 of the Transmitter design an refining the system parts layout.
3. Transmitter and Power Supply closeup. The wire mesh was added during the testing phase of this project, it is not needed during the normal run condition as the total output power is well below 4mw.
5. Closeup view of the new and improved band notch filter verses the earlier LPF and note the seperation between the transmitter and the output filtering section using PCB material.
6. Starting to add some of the FSK parts (NPO Caps,Resistors & Red LED) and added parts to monitor the output power directly at the BNC connector after it passes through the notch filter.
7. Fruit Canned! This is what it looks like with the shield on, with my improved notch filter and this shield my second harmonic is -50dbm and the 3rd is down around -70dbm. So, the notch filter is the way to go versus the LPF, it takes a few more parts. However, it is worth the clean signal output.
8. The unit has been transmitting for several weeks now to burn in the transmitter and I have starting working on the Microcontroller Board (Phase 3). I have plenty of room on the board to do a lot of things. So, we will see what happens next as I may still try jamming the Microcontroller into the VFO section.
Build Notes:
* Remove jumper wire from load match resistors between buffer amp and Notch filter.
* Remove wire mesh or cut it down on buffer transistor.
* Decide on using DFCW or just CW for op mode. No matter keep the sending speed at about 5-wpm.
* Microcontroller mounting (Internal or External of the VFO). Factors; Noise, Heat (Types 206's or 675's)
* Live output monitoring not needed with current design. However, leave parts on board for future use.
FCC Information regarding the ISM 22meter band also called the HiFER band.
Frequency Band: 13.553-13.567 MHz
Type of Use: ANY MODE
Emission Limit: 15,848 microvolts/meter at 30 meters (As measured with a Tuned FSM & 1 meter long omni directional antenna)
Detection Method: quasi-peak (Quasi-peak means 'not quite peak', or 'aiming towards peak but not actually peak'.)
FCC Guidelines: 47 CFR §15 (FCC rules and regulations, mainly regarding unlicensed transmissions.)
Section 15.225 Operation within the band 13.110 - 14.010 MHz.
(a) The field strength of any emissions within the band 13.553-13.567 MHz shall not exceed 15,848 microvolts/meter at 30 meters.
(b) Within the bands 13.410-13.553 MHz and 13.567-13.710 MHz, the field strength of any emissions shall not exceed 334 microvolts/meter at 30 meters.
(c) Within the bands 13.110-13.410 MHz and 13.710-14.010 MHz the field strength of any emissions shall not exceed 106 microvolts/meter at 30 meters.
(d) The field strength of any emissions appearing outside of the 13.110-14.010 MHz band shall not exceed the general radiated emission limits in § 15.209.
(e) The frequency tolerance of the carrier signal shall be maintained within +/- 0.01% of the operating frequency over a temperature variation of -20 degrees to +50 degrees C at normal supply voltage, and for a variation in the primary supply voltage from 85% to 115% of the rated supply voltage at a temperature of 20 degrees C. For battery operated equipment, the equipment tests shall be performed using a new battery.
(f) In the case of radio frequency powered tags designed to operate with a device authorized under this section, the tag may be approved with the device or be considered as a separate device subject to its own authorization. Powered tags approved with a device under a single application shall be labeled with the same identification number as the device.
Disclaimer:
This information and the circuits are provided as is without any express or implied warranties. While every effort has been taken to ensure the accuracy of the information contained in this text, the authors/maintainers/contributors assume no responsibility for errors or omissions, or for damages resulting from the use of the information contained herein.
I disclaim everything. The contents of the articles might be totally inaccurate, inappropriate, or misguided. There is no guarantee as to the suitability of said circuits and information for any purpose whatsoever other than as a self-training aid. I.E. If it blows your equipments, trashes your hard disc, wipes your backup, burns your building down or just plain don't work, IT ISN'T MY FAULT. In the event of judicial ruling to the contrary, any liability shall be limited to the sum charged on you by us for the aforementioned document or nothing, whichever is the lower.
I will not be held responsible for any damages or costs which might occur as a result of my advice or designs. All of my designs are allowed to be used for commercial purposes without my written authorization.
Chemical Safety:
Use of any and all Chemicals is simple “Read the damn Label” and don’t be a Hero or an Idiot.
Use, Recycle, Reuse and Dispose of everything properly.
* Transmitter
* Microcontroller Board
* Antenna
* Solar/Wind Power Supply
* Systems Integration and Testing
* Site locations and Permissions
* System Installation and Verification
* Announcement
1. Here we are performing some initial testing to see what will be needed to get up and running on the 22meter band.
1A. Above is the LPF (low pass filter) built and used for initial testing. (Below) this is the CW transmitter under test.
2. Here we have quickly moving into Phase 2 of the Transmitter design an refining the system parts layout.
3. Transmitter and Power Supply closeup. The wire mesh was added during the testing phase of this project, it is not needed during the normal run condition as the total output power is well below 4mw.
5. Closeup view of the new and improved band notch filter verses the earlier LPF and note the seperation between the transmitter and the output filtering section using PCB material.
6. Starting to add some of the FSK parts (NPO Caps,Resistors & Red LED) and added parts to monitor the output power directly at the BNC connector after it passes through the notch filter.
7. Fruit Canned! This is what it looks like with the shield on, with my improved notch filter and this shield my second harmonic is -50dbm and the 3rd is down around -70dbm. So, the notch filter is the way to go versus the LPF, it takes a few more parts. However, it is worth the clean signal output.
8. The unit has been transmitting for several weeks now to burn in the transmitter and I have starting working on the Microcontroller Board (Phase 3). I have plenty of room on the board to do a lot of things. So, we will see what happens next as I may still try jamming the Microcontroller into the VFO section.
Build Notes:
* Remove jumper wire from load match resistors between buffer amp and Notch filter.
* Remove wire mesh or cut it down on buffer transistor.
* Decide on using DFCW or just CW for op mode. No matter keep the sending speed at about 5-wpm.
* Microcontroller mounting (Internal or External of the VFO). Factors; Noise, Heat (Types 206's or 675's)
* Live output monitoring not needed with current design. However, leave parts on board for future use.
FCC Information regarding the ISM 22meter band also called the HiFER band.
Frequency Band: 13.553-13.567 MHz
Type of Use: ANY MODE
Emission Limit: 15,848 microvolts/meter at 30 meters (As measured with a Tuned FSM & 1 meter long omni directional antenna)
Detection Method: quasi-peak (Quasi-peak means 'not quite peak', or 'aiming towards peak but not actually peak'.)
FCC Guidelines: 47 CFR §15 (FCC rules and regulations, mainly regarding unlicensed transmissions.)
Section 15.225 Operation within the band 13.110 - 14.010 MHz.
(a) The field strength of any emissions within the band 13.553-13.567 MHz shall not exceed 15,848 microvolts/meter at 30 meters.
(b) Within the bands 13.410-13.553 MHz and 13.567-13.710 MHz, the field strength of any emissions shall not exceed 334 microvolts/meter at 30 meters.
(c) Within the bands 13.110-13.410 MHz and 13.710-14.010 MHz the field strength of any emissions shall not exceed 106 microvolts/meter at 30 meters.
(d) The field strength of any emissions appearing outside of the 13.110-14.010 MHz band shall not exceed the general radiated emission limits in § 15.209.
(e) The frequency tolerance of the carrier signal shall be maintained within +/- 0.01% of the operating frequency over a temperature variation of -20 degrees to +50 degrees C at normal supply voltage, and for a variation in the primary supply voltage from 85% to 115% of the rated supply voltage at a temperature of 20 degrees C. For battery operated equipment, the equipment tests shall be performed using a new battery.
(f) In the case of radio frequency powered tags designed to operate with a device authorized under this section, the tag may be approved with the device or be considered as a separate device subject to its own authorization. Powered tags approved with a device under a single application shall be labeled with the same identification number as the device.
Disclaimer:
This information and the circuits are provided as is without any express or implied warranties. While every effort has been taken to ensure the accuracy of the information contained in this text, the authors/maintainers/contributors assume no responsibility for errors or omissions, or for damages resulting from the use of the information contained herein.
I disclaim everything. The contents of the articles might be totally inaccurate, inappropriate, or misguided. There is no guarantee as to the suitability of said circuits and information for any purpose whatsoever other than as a self-training aid. I.E. If it blows your equipments, trashes your hard disc, wipes your backup, burns your building down or just plain don't work, IT ISN'T MY FAULT. In the event of judicial ruling to the contrary, any liability shall be limited to the sum charged on you by us for the aforementioned document or nothing, whichever is the lower.
I will not be held responsible for any damages or costs which might occur as a result of my advice or designs. All of my designs are allowed to be used for commercial purposes without my written authorization.
Chemical Safety:
Use of any and all Chemicals is simple “Read the damn Label” and don’t be a Hero or an Idiot.
Use, Recycle, Reuse and Dispose of everything properly.