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
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