SX-2000 QRP HF transceiver
“”I had in mind for a long time to realize an HF transceiver complete with all the functions of a commercial apparatus. Unfortunately, the time available and not ‘how much and instead of my usual carry the usual “simple” QRP x complicate life so I decided to go overboard with this fantastic new project.
The first phase ‘was to design homes with all the dimensions are then passed to the VFO and that ‘an apparatus for the TOP homebuilt. Everything is’ run by a powerful micro ARM 32bit associated with a Touch Screen. All the apparatus and ‘managed via Touch Screen and in the future’ will also be a FFT band style IC-7800.
The project and needless to say ‘very ambitious so I’m working with my friend IZ7JXJ specialist equipment QRP transceiver has achieved excellent x 70MHz and multiband hf so we’re a good hands . I’ll take care ‘of all the various digital and design while him across the analog part. VFO and ‘very complex and will be implemented once x time x other features now let’s start with the fundamentals – Dual VFO A / B – Split, Rit – Meter and digital Smeter – Keyboard Touch screen – Dual managing all parameters and this’ first draft of the monster
“Then x VFO knob position, and ‘almost inevitable due to lack of space on the front but it did not’ yet final so let’s see what I can come up. I’m coming back to us by completing the VFO and this’ first prototype.
I managed to contain the entire circuit which includes: – Micro 32bit – Touch Screen IC – IC USB port in a really small PCB that lies behind all the color display 3.2. Obviously a lot of work to design a single-sided PCB that contains more ‘than 100 runs three 0.25mm smd integrated. At the end the result is’ everything works great ……. I had some trouble with the touch screen and the realization of the PCB strictly HOME MADE but the end result has paid off.
This’ very first prototype to test the logic and develop the software. Next step and ‘all interfacing to the QRP that I imagine on a single I2C bus. Among DDS, filter and switching board there will be a hundred different I / O pins so everything must be designed with a certain criteria. The philosophy and ‘minimize the components simplify installation and rely 100% on a high-tech device of the latest generation.
attach some pictures. The first and ‘how will’ on the radio and the second ‘part of the logic of the third and VFO’ VFO combined with a QRP IZ7JXJ made by a guru of QRP . With a minimum of wiring would already ‘ready a small tri-band. His QRP includes everything 10x16cm namely: – IF – BFO – Filter Board RX & TX – AGC – Final 5Watt Currently the three bands are 10/15/20mt but can be added to other bands at will. the analog part and ‘was carried out on double-sided PCBs and is’ a mix between SMD and conventional components x facilitate mounting. Returning to the VFO and ‘was also implemented a USB port x interface the radio to the PC using an emulation YAESU CAT compatible with the standard, so use hamradio deluxe or similar programs.
73 ‘ Antonio IZ7LDG
Photos – Click to enlarge
We know many examiners have canceled amateur radio license exam sessions to meet the requirements and recommendations of national and local government... Read more
Spain’s International Amateur Radio Union (IARU) member-society URE has obtained temporary permission from the country’s telecommunications regulator... Read more
Some countries around the world are allowing radio amateurs to use special “STAYHOME” call sign suffixes. For example, listen for 8A1STAYHOME from Ind... Read more
The EMCOMM III Portable antenna is a portable High Frequency (HF) antenna specially designed for short to long range portable and man-pack HF comm... Read more
In response to the coronavirus emergency and to comply with the government’s social distancing recommendations, the RSGB announced on 20 March that it... Read more
Radio amateurs continue to play key roles in developing the electronic control system for an open-source/architecture, modular, low-cost human patient... Read more
Restrictions on gatherings due to the COVID-19 pandemic recently prompted a novel approach to multioperator/multi-transmitter operation. The WW2DX ent... Read more
Ham Radio Test Online – USA conducts first online ham radio exam – special thanks to W5YI for supporting this project. Read more
DOWNLOAD .PDF LIST BELOW Read more
Illinois ARES members are supporting the Illinois Emergency Management Agency’s (IEMA) COVID-19 response activities as AuxComm Radio Operator voluntee... Read more
Spain’s national amateur radio society URE has talked to their regulator and obtained permission for unlicensed people to use amateur stations d... Read more
The FCC has granted temporary permission to wireless internet service providers (WISPs) in rural portions of 29 states and the US Virgin Islands to op... Read more