Friday, July 4, 2014

SX-2000 Information

From the forum starting in April:
"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 ................ HF Transceiver SX-2000 
PS for followers of MetroVna PRO coming up short versions  
73 ' Antonio IZ7LDG"
"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"

"Today as it pours out I have dedicated myself to change the case of the apparatus HF. Indeed, the arrangement of the microphone connector could be a little 'uncomfortable under the VFO knob so I changed the layout of the front. I took the opportunity also to eliminate some redundant switch now all controls are easily accessible on the touch screen display. All the logic and the analog part will be 'handled by the touch screen like in most modern commercial equipment of last generation. entire project will be 'meticulous attention to detail we are not going to make a ILER MULTI-BAND hihi as seen and reviewed many of them around. 
I'm trying to contain the size of the apparatus in a case 87X180x210mm just more 'top of a 897-ft. Weather permitting and 'developing even the analog RTX by IZ7JXJ but this and sent to the next episodes .... I ride a few pictures of the second prototype ........ I recommend xi used sparingly Scopiazzae
73 ' Antonio IZ7LDG"

"You see that I'm on vacation? Hihihi So today I continued with the installation in homes. After piercing milled etc ... I also installed the logic you around some pictures to you the judgment ....... 
73 ' Antonio"

And someone says:
"It will be the small Italian Elecraft? The 'aesthetic is very appealing and the touch screen is very sensitive, when we listen to him?"
I like that - the "Italian Elecraft." That's a good goal. At the risk of getting in trouble, I will add that I told my wife that I was branching out and posting about an Italian radio. Her immediate reply was that she "learned  to drive in an Alfa Romeo and that this radio would look pretty, but she hoped it worked well!"

Back to the posts:
"still touches a lot of development work and planning that's why the collaboration with 4 hands and your head. The project 'very complex and I personally do not like things carelessly but I found those who are' even more 'picky me. 
I could design a QRP from scratch but I definitely would have got 2 standard equipments so better one at the TOP on which to focus the experience of both. Having stated this, the apparatus 10/15/20mt 'already' ready and it 'designed by Raul really wisely. With the exception of the VFO circuit and all the 'content in a PCB 10x16cm say everything including the final and even the band filters. Unlike other projects here are ONLY 4 relays' not 10/20 as in other organ systems around.Secrecy and 'all in the design. A sample in the output filter board has only 3 relay which in combination switch the L / C to reduce almost to zero all the harmonics, unnecessary use relay 6 'to achieve the same result. That 's the philosophy "simply and simplicity" the purpose and' a great apparatus not collect unnecessary components that make Pies that the om mounts. 
Back to us we are evaluating whether to add the low bands QRP to existing or redesign everything from scratch. wonder 'what choice will be' adopted for the tests and the results' as good and 'also excellent sensitivity' and dynamic apparatus. This 'a first test ON-AIR 10m DX DX 20 meters We are only there will be other tidbits ABC news' 
73 ' Antonio IZ7LDG & IZ7JX"

And IZ7JXJ chimes in:
"Hello guys ......! so I can say that in the tri-band showed it was not designed for this LOOK .... I drew the usual VFO with alphanumeric display 2X16 NORMAL and the AD9951 DDS as ..... therefore inexpensive everything. things now become more beautiful then most challenging. 'm drawing again a SEVEN bands to match the VFO IZ7LDG. bands will contain 80, 40, 20, 17, 15, 12 and 10m ... .. Not easy to do with as he wishes FEW components Antonio (LDG) but let's see what comes out. To (iz2hfg) ..... You can not expect the result of a TS990 with the technology that we use here dear ..... will certainly MORE MODEST the result .... but .... THE PRICE!! .... ULTRA for these results are already there .... their commercial appliances. then I consider all of these types apparatus, even if they are beautiful to look at, TOYS made ​​with a lot of passion for the Autocostruzioni ..... Who thinks he's a genius because it does these things ........ it is another thing .. according to me ..... ....! .... The problem is the time in this last period I do not have much available then we will have to wait a while '....... and have a little 'patience. 
Greetings to all .... 73 ​​' RAUL RODA (IZ7JXJ)"
And the last word:
"The mission and 'replicate the success of MetroVna building a QRP high-end that is not a killer but a TS-990 QRP killer . Up to now I have not seen a home made ​​project really lived and technologically advanced in this segment of the radio except a few rare examples like the PICASTAR but had no large following because of the exorbitant costs x achievement. We will be 'much more' simple slender and especially more 'economical former all. I think that's the location where to place the project. Clarified that we do not lack the enthusiasm and expertise to make it happen and the only obstacle 'on time and on budget but the end result will be' up ........ SX-2000 QRP KILLER 
73 ' Antonio IZ7LDG & IZ7JXJ"

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