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Re: Calibration
#calibration
Sascha Bohnet | DL5SMB
I would also recommend the built-in WSPR function in KD8CECs firmware to calibrate the frequency offset.
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Re: Anuino and uBitx in the news
Gordon Gibby <ggibby@...>
Dave, fabulous comments! I agree heartily
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On Sep 20, 2019, at 06:49, David Wilcox via Groups.Io <Djwilcox01@...> wrote:
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Re: Anuino and uBitx in the news
Russ KR0EHM
I just got my Tech and General and found out about the uBitx and ordered it too :-)
Looking forward to digital modes - mainly WSPR, which sounds really fun. Until then I will be trying out FM satellites with my Baofeng and tape measure yagi. (I’m not posting my call sign until I get my vanity call sign through. In case you’re curious)
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Re: Anuino and uBitx in the news
Skip Davis
Well said David, I can spend hours reading, noodling, and building little projects and gain great satisfaction form it all. I don’t have to make hundreds of contacts but the one or two made with the latest gadget really puts a smile on my face and warms the heart. I believe there are far more hams out there tinkering with these rigs and projects than you see in the various reflectors and blogs. Just look at the numbers of these rigs (and ones like it) that are sold.
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I’ve got to tell you this stuff does interest the young ones too, my nephew was fascinated with my small portable station I brought with me while visiting my sister. From I life long tinkerer, I still pull out one of the first direct conversation receivers I built and scan the bands just to listen. Skip Davis, NC9O
On Sep 20, 2019, at 06:48, David Wilcox via Groups.Io <Djwilcox01@...> wrote:
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Sam Tedesco
Here is the CEC 2.8 flipped upside down. I'm not sure if the provided 2.8" fills the screen or has to be adjusted. Let me know...
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Re: uBITX rotary enconder
John Scherer
I know this is an pretty old post but I have some info that might help others too. I have been playing with a modified version of that exact code on Jim's (W0EB) wonderful BITeensio board with a Teensy 3.6 processor, and I'm able to read my 1024ppr optical encoder pretty much as fast as I can spin it. The 1024ppr encoder is pretty useless for the uBitx unless I added routines to divide the ppr (way)down, but I also have several ENA1J-B28-L00128L encoders which I do plan on using in my uBitx. These are very nice and have square wave output and no de-bounce needed. Now I just need to figure out how to replace the existing encoder non-interrupt based routine with this code..
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On Wed, Feb 7, 2018 at 12:01 PM, Michael Monteith wrote: After I saw the post and responses I was wondering too. I ran across this that might help. If nothing else it helps with doing fast digital writes. --
John - N0CTL - Fulltime RV in a 40' motorhome
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Re: uBITX rotary enconder
I've installed this one : http://www.tobeca.fr/f4ija/doku.php?id=ubitx:rotary
Since I've red a post of another ham. Working well in my case. beware of the wiring I needed to invert the logic of rotation. -- 73's Adrien F4IJA https://www.qrz.com/db/F4IJA
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Re: Calibration
#calibration
Sascha : do you have the like for the formula of KD8CEC ? I can't find it on his website ?
Thank you, -- 73's Adrien F4IJA https://www.qrz.com/db/F4IJA
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Re: Calibration
#calibration
d.maccallum@...
Thanks for replying to my request for help. See the following link: http://ubitx.net/manual-kd8cec-firmware/
I am going to update my firmware to KD8CEC 1.061 or 1.072 because KM6SN put together a very well done manual and it documents exactly how use the new firmware. The tune up and BFO adjustments have been improved in the new firmware. I am now waiting for a USB to Mini cable I just ordered for my laptop to Arduino Nano firmware update. I think that KD8CEC has corrected a lot of things and he also has a path forward for some great mods. Gonna add BCI filter, AGC fix and a 700 HZ cw filter. I think a lot of the problems have to do with not having AGC. I live in an area that has a lot of AM broadcast stations so the BCI filter should get rid of the interference. I like CW so I will put in the audio 700hz filter from the 4 State QRP club. Have Fun.... Dave N8KZ
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Re: Accidental Calibrate
#ubitx
#calibration
hickmodawg@...
I am just an ignorant beginner in amateur radio. I hope someone can answer my plea for help. I assembled my uBITX (v.5) and put it in an enclosure. It works! I am very happy! My first real building success! The receive sounds great. My local HAM friends tell me that my transmitted CW sounds good too. The problem is that the signal they receive is not on the frequency shown on my LCD. Also, they transmit on a certain frequency, but I must tune to a different frequency to hear them. Both my receive and transmit frequencies are different from what shows on my LCD. Can I solve this by “calibration?” I read some threads here and it seems that others have solved this problem but to a new beginner like me, the steps are not clear. I’m not really experienced with Arduino or Raduino, but I’m eager to learn. I know it’s a big ask, but, is there someone who might write a step-by-step detailed procedure for “calibrating” for a new beginner like me? Including the very basic steps? I’ve read some of the threads of those who have accomplished this. I know I can do it, but I need a little help… Thanks for all the great advice and help so far. This forum has gotten me on the air and I have learned so much! Martin, AJ6CL
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Re: Calibration
#calibration
I'm making a calibration page on my website here : http://www.tobeca.fr/f4ija/doku.php?id=ubitx:calibration
I'm writing it right now as i'm right now calibrating my rig. This method is simple and seems to work quite well in fact. -- 73's Adrien F4IJA https://www.qrz.com/db/F4IJA
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Re: [ENA1J-B28-L00128L/
Wayne Leake
John Scherer, the encoder you have is way too pricey, at over $52.xx each. I have a couple of nice low priced ones, with a breakout board, and several without the board that were way cheaper by far. I figure to use one with the Raduino, and another with a different Arduino,to control an si5153a, or whatever the number is, instead of the 10K or 100K pot. I'm way behind,due to being held back by a combination of illness and having a number of things pop up, including losing a truck and some supplies when the truck decided to burn up last April 3rd. will be working with BITX40's and a BITX20 ( I'm assembling it on a bare board pair). I love the idea of using the rotary encoders. Glad to see a bit more information on them. Wayne WA2YNE Imperial TX
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Re: Gordon Gibby Digital Interface
All orders have been built and set for shipping. If by some random haze of madness I missed your order let me know. All orders will have a USPS tracking number linked to your paypal. 73 More are on the way soon! N8DAH
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Re: uBITX rotary enconder
What’s the benefit of using this encoder instead of the standard one?
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Re: uBITX rotary enconder
The one I've? I feel it smoother ans quieter and global better quality.
-- 73's Adrien F4IJA https://www.qrz.com/db/F4IJA
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Re: uBITX rotary enconder
I also use this type of optical rotary encoder. It is much better and the feel is just perfect.
Between the encoder and the Radiuno I have a extra Arduino to adapt the pulses and divide them to not overrun the Radiuno. I found a sketch by Jim Smith - G3ZQC and Glenn Percy - VK3PE to perform this task perfectly and only added some stuff for my project. Try it ! Regards and 73's PE1MHY Guido
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Re: Calibration
#calibration
Evan Hand
Please be aware that the new v5 boards need to have the CEC version 1.2 or higher. The IF frequency changed between the v4 and v5 boards. IF you are going to go back to an older version of CEC for use on the v5 board you will need to go into the source and change the IF frequencies, recompile and then download.
Also be aware that the stock firmware requires a dummy load and separate receiver or frequency counter to calibrate. The CEC software does not need the dummy load to calibrate. The HF Signals' Tuneup web page instructions for step 2 are WRONG (Ashhar, this REALLY needs to be fixed!). The stock firmware that I received on my v5 board put the uBITX into TRANSMIT mode at 10mhz. Maybe this has changed with newer boards. Since in my country (USA) 10MHz is not a valid ham frequency, a dummy load must be used. I am pretty sure that this was done to facilitate the production testing/calibration process, however it does cause a problem if you are trying to calibrate and do not know that it will go into transmit mode at 10mhz. It can also cause damage to the uBITX if left in this mode too long without a proper load. (note: QRP-Labs makes a nice 20 watt kit: http://shop.qrp-labs.com/dummy) For the stock firmware, dummy load and receiver/frequency counter setup, it is fairly easy to set the receiver to 10mhz (I assume that you calibrated the receiver/freq counter before this) and adjust the calibration until you get a zero beat on the receiver or 10 MHz on the counter. Using a frequency counter, it is just a matter of connecting to the counter through an attenuator to reduce the signal (the QRP-Labs dummy has a tap on it). Most counters will work with a short wire held near the dummy load, no physical connection needed. If you have an oscilloscope with a frequency counter built in, you could use it. Most oscilloscopes are not that accurate, so I do not recommend this approach, unless being used as a relative reference. Once the master clock has been calibrated, I have found that the BFO is best adjusted with a free audio spectrum analyzer software. Connect a mic to the PC, find a frequency with only static, hold the mic close to the speaker and adjust until the amplitude of the signal displayed is between 500 and 2500 Hz. Free PC software: http://www.techmind.org/audio/specanaly.html Above is my free advice, please use with caution as I could be wrong and will not assume any responsibility for it's use. Good luck! 73 Evan AC9TU
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Re: Calibration
#calibration
Evan Hand
I went back and checked the QRP-Labs dummy load. The connection is a filtered power indication. This may not work for frequency counters, as the filter will lower the signal. The small wire near the dummy is probably the best approach if you do not have a true attenuator.
Apologize for the miss information. 73 Evan AC9TU
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Re: [ENA1J-B28-L00128L/
John Scherer
Yes, those encoders are pricey. I got mine for like $4 each from a surplus electronics shop in San Diego. Though, having used them now, I'd still be tempted to use them even if I had to buy one new. The issue most people have with using high ppr encoders with the uBitx is the processor is pretty slow and the encoder routines in the base Raduino code are not interrupt driven. Also using digitalReadFast to read the encoders helps. If you get much beyond a single 400/600 ppr encoder and you will likely need a faster processor to do it. I'm using the BITeensio board with a Teensy 3.6 processor. I've tested that board with two 1024 ppr optical encoders with no problems. Those encoders would be of little use to the uBitx thought, without some division ;-) -- John - N0CTL - Fulltime RV in a 40' motorhome
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WTB 680nF Inductors
#parts
Dale Hardin
Anyone have surplus 680nF inductors for V3 fix of spurious signals? If so, contact me privately to discuss details.
Thanks, Dale -- Dale Hardin, KS4NS Elberta, AL
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