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uSDX
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On Sat, Jun 5, 2021 at 08:34 AM, Tom, wb6b wrote:
I'll see if I can google around and find the article again.HI, I have not found anything that looks like the original article I read. However, if you are stranded on an island and you feel confident in the information you may find on Wikipedia on building a boat, it looks like you can download a copy to keep with you, with only 83GB of storage. Don't know if that is only the text or if the images are included. -------
Tom, wb6b |
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Finally got a microphone hooked up to the uSDX this morning and spent the day making contacts!? Slick little radio, for the price, but I like the uBITX better for base station duty. But, once I get it in a box it will be a great little radio to hump back into the weeds and operate POTA!? :-)
73, Justin B. KI5GKD |
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David Alexander
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On Tue, Jun 1, 2021 at 07:29 AM, Ashhar Farhan wrote: |
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On Tue, Jun 1, 2021 at 07:29 AM, Ashhar Farhan wrote:
I thought hard about current consumption. "We are no longer in Kansas".I saw an article a little while back. The article was a comprehensive list of reference sites, articles, books and data that you should clone onto a Raspberry Pi and place in a sealed metal box, so if an apocalypse?happens you have everything you need for reference to start over again. (I suppose you should put a keyboard, some kind of display and versatile power source in there, too.) This could be a good idea if you are operating from a remote mountain top to use a Raspberry Pi to control your radio so you have everything you need information wise should things go bad while while you are away from civilization. :) Tom, wb6b |
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A Pico Pi is a big step up in capability from the current ATMEGA328.
IMHO the uSDX is more of an exploration of what can be done that any sort of product like the uBITX or QCX. Guido, PE1NNZ, develops the firmware and originally modified a QCX. I haven't seen any other hardware from him.? There are several different uSDX firmware compatible board set designs from different enthusiasts and multiple versions of each. Other enthusiasts have taken on making the PCBs and component kits. The firmware appears to be in a perpetual beta state with the latest change yesterday to V1.02s, while the last "official" release 1.02j was 8 months ago. -- ? 73 ??? Bob? KD8CGH |
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I thought hard about current consumption. "We are no longer in Kansas". The modern LiPo battery with 3400 mA hours is cheap. At 14.4 volt battery will run sbitx for 5 hours. You can switch off the display to run it for 12 hours. A bigger battery with 5.6 Amp-Hours will still be cheap. The Quadcopters have opened up the battery market. I stilll prefer to carry my direct conversion radio on weekly family hikes. That draws 25 mA in rx. It is quiet and all analog. - f On Tue 1 Jun, 2021, 7:50 PM Ashhar Farhan via , <farhanbox=[email protected]> wrote:
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So, Here are the figures : 1. Raspberry Pi4, with 4.3 inch waveshare screen (800 x 480 pixels, veru readable, like a smartphone), running sbitx = 540 mA. With wsjtx, 650 mA. 2. Rpi 4, with 7 inch display (800x480 px), running only sbitx 700mA, with wsjtx 900mA. On Tue 1 Jun, 2021, 7:40 PM Jack, W8TEE via , <jjpurdum=[email protected]> wrote:
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Jack, W8TEE
Mornin' Ken: Yep, and I get that if you're hiking 10 miles up a vertical cliff to a place where you have to carry in your own antenna mast to get the EFHW off the ground. That's their "thing" and that's fine. But for those of us who find that a nice brisk walk to the mailbox satisfies the day's need for hiking, our demands are very different. And therein is the beauty of this hobby: Both are correct! Enjoy whatever floats your boat! Jack, W8TEE
On Tuesday, June 1, 2021, 9:59:03 AM EDT, Ken Hansen <ken@...> wrote:
Jack, You should go spend some time on the FT-817/818 mail list - they obsess down to the smallest detail for saving power, to the point where it is considered "wasteful" to use a particular antenna Jack, because doing so causes an internal relay to be energized all the time, consuming 3ma! How wasteful! Ken, N2VIP On Jun 1, 2021, at 09:43, Jack, W8TEE via groups.io <jjpurdum@...> wrote:
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Jack, W8TEE |
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开云体育Jack,You should go spend some time on the FT-817/818 mail list - they obsess down to the smallest detail for saving power, to the point where it is considered "wasteful" to use a particular antenna Jack, because doing so causes an internal relay to be energized all the time, consuming 3ma! How wasteful! Ken, N2VIP On Jun 1, 2021, at 09:43, Jack, W8TEE via groups.io <jjpurdum@...> wrote:
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Jack, W8TEE
I get the "green" emphasis, but part of me wonders "why" when it comes to a transceiver. Yes, I do understand SOTA, POTA, IOTA, and the other OTA's and I indeed hope to be a part of that this summer, but is that why we are so obsessed with current draw? If the idea is an xcvr that you can throw in the trunk for a vacation trip, if it draws 3A on xmit, why isn't that acceptable? The SDT Al and I are working on draws 0.7A on receive, but to me that's acceptable for a receiver with a 5" display. Where's the balance point between the feature set and power consumption? Clearly, whatever that balance point, it's going to be different based on your planned use. Jack, W8TEE
On Tuesday, June 1, 2021, 8:01:39 AM EDT, Bob Benedict, KD8CGH <rkayakr@...> wrote:
There is an effort to port the code to a Pico Pi which has dual cores and much better capabilities, but is still a controller and much less power hungry than other Pi models. /g/ucx/message/6950 -- ? 73 ??? Bob? KD8CGH -- Jack, W8TEE |
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开云体育The capabilities and included functions of an RPi PICO are so drastically reduced compared to an RPi 3 or 4 that there is almost no comparison. That said, for its original design, an RPi at the heart of a transceiver like the uSDX is, to use a phrase "over-kill" but, just imagine what can be done with the Bluetooth, WiFi, and Ethernet connectivity by an enterprising experimenter, not to mention the HDMI display and USB ports that can have mice and keyboards attached. How long before an enterprising amateur adds the missing software bits to build a single-box, all-in-one digital mode transceiver with built-in logging?The uSDX is intended, it seems to me, more as a starting point design, than a final, optimized design, like, say, a commercial transceiver from any of the major manufacturers. Ken, N2VIP On Jun 1, 2021, at 07:58, Bob Benedict, KD8CGH <rkayakr@...> wrote:
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There is an effort to port the code to a Pico Pi which has dual cores and much better capabilities, but is still a controller and much less power hungry than other Pi models.
/g/ucx/message/6950 -- ? 73 ??? Bob? KD8CGH |
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开云体育Raspberry Pi power consumption figures:RPi 4 consumes about 600 ma, or about 3 watts at 5 volts Raspberry Pi Official 7" touch display power consumption: The display consumes about 550 ma, so again, about 3 watts at 5 volts On startup power demands are higher, these are the steady-state power consumption figures. The 2-2.5 amp requirements include power for USB accessories, not just the RPi. Ken, N2VIP? On Jun 1, 2021, at 04:17, Evan Hand <elhandjr@...> wrote:
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On Mon, May 31, 2021, at 09:33 PM, Ashhar Farhan wrote:
When someone finishes the usdx build, I would like them to measure the opposite sideband and the audio distortion. I am curious how well it works.I too would be interested in actual performance data, most importantly the efficiency data.? Efficient portable SSB operation was the original goal of the ?SDX, gaining the Class E power efficiency for SSB use.? I have not seen this data for any of the kits offered, nor is the ongoing effort to constantly improve on the efficiency while maintaining reasonable signal quality.? Since it is the efficiency of power use as the goal, as long as the signal is intelligible and within legal requirements, then the goal is met if it has better power efficiency than similar SSB transceivers.? That would be total power for operation, not just the finals. I do not mean to criticize the effort.? It is amazing what has been done.? I am just not sure that the original goals are still the focus of the group. At the same time, while interesting, I can say that I will not be building one.? If there were a Teensy or another better-specified microcontroller I might be.? One reason for my interest in the sBITX that Ashhar Farhan is working on now.? Based on data from him so far, portable operation would not be one of the major goals.? The Raspberry Pi is a real power hog, up to 10 watts just to run it, and that does not include the display.? So far the superheterodyne seems to be the most efficient for SSB use.? That is NOT the case for CW as Hans Summers has proven with the QCX Mini.? I could be wrong about this, as it is not based on any real data that I have analyzed.? SDR is the trend as Icom and Elecraft are showing with their QRP portable rigs.? They still have a standard PA and are being driven by features more than power efficiency. The above are my thoughts, others will be different, and that is OK.? I am always open to new data to change my view. 73 Evan AC9TU |
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When someone finishes the usdx build, I would like them to measure the opposite sideband and the audio distortion. I am curious how well it works. - f On Tue, Jun 1, 2021 at 6:51 AM Justin Bowser - KI5GKD <justin.bowser@...> wrote: Robert, |
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Robert,
I have the boards and have completed one and it works nicely!? If you still want one, or two let me know.? I have not hooked up a mic and transmitted yet but the receiver works great.? Maybe I'll try to fry the finals tomorrow! ;-) It will be fun to play with but I don't think my V6 should worry about being replaced as it just works so good! If anybody else would like a board I'll have 8 to turn loose. 73, Justin B. KI5GKD |
Bob Bennett
Bob Benedict, KD8CGH
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