Re: add yourself to the new BITX operators map
Monitored again, and no one else on "Live"
73
Evan
AC9TU
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Re: add yourself to the new BITX operators map
Suggestion:? Add the frequency being monitored to the Live symbol.? Something like this:
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QSO Today Expo August 8 and 9 anyone?
Anyone attending the QSO Today Expo?
Some of us will be presenters on this FREE, global, virtual event.
More info:
73 de KH6WZ/W6
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Wed 7/29 BITX QSO night 7pm Central (US) on 7.277
Subject pretty much say it all.? You are informally invited to play radio Wednesday 7/29 at 7pm (central daylight time) on 7.277.? I'll be yelling CQ BITX.? Yell back if you feel like it.
Doug
AC9RZ
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Re: uBITX V6 Expanded System
Well, yesterday I posted a Youtube vid of the radio and some of the added components, which included the tuner, power supply, SWR meter, etc. I've been discussing the S-Meter with a few guys here. Wanting to keep the circuitry analog for future users, I didn't want to learn (and expect them to learn) the software code.? So, here's how I did it within the analog domain. Thanks to all for your suggestions, Bob, N1KPR
NOTE Pls add backup address to your phone book: rwbetts@...
http://www.bobsamerica.com? http://www.youtube.com/n1kpr
Engineering: Where Enigma meets Paradox
On Monday, July 27, 2020, 10:54:47 AM EDT, Bob, N1KPR <rwbetts@...> wrote:
Thanks Arv:
I'm really resisting the s/w route b/c this unit will be handled by club members. I want to keep the reliance on s/w confined to the original ver. The guys at the club can handle hardware, physical components, mods and repairs, but who knows what software capable club members may try or NOT try in the future. This way, if there's any probs, they can just refresh the original firmware and be done.
Anyhow, today I played with a couple of S-Meter circuits and where to tap the signal. I reasoned that since there is no AM carrier (dead air) to contend with that I could just calibrate a meter to the SSB and CW analog signals. Anyway, I got the meter to work very nicely and it behaves just like a regular Ham xceiver while receiving SSB. I'm using a high impedance input amp to get gain from the H side of the audio pot. That drives a 1N914 to a 10uF filter cap, then a 20K trim pot to the 500uA meter. It works perfectly. I played it side-by-side with a communications receiver to calibrate the trim pot. I'm happy and life is good. While I was at it, I added red and green LEDs thru a differential amp that indicate 'dead air' or 'signal present'. Now, when the rig is in the field I can tell if someone is calling...visually. Like when you take the headphones off to talk to your assistant (EmComm logger), or are just physically away from the radio. Flashing green means someone is calling.
Next step is adding another T/R relay to use the Preamp/Attenuator on receive.
Thanks everyone for your interest in helping us with this project.
Bob, N1KPR
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Re: At my wit's end with this uBitx
Grover,
1 - Yes, the values are dependant on the Raduino and Mainboard
2 - No, as far as I know, the Memory Manager only works with the KD8CEC software.? There is a modification that can be made to the old stock software posted on his site, however, I do not believe there is enough memory available to add it to the v6 stock software.
3 - Yes, that is the correct file for both the v5 and v6 uBITX boards?
4 - There are not any files to load onto the Nano on the Raduino board.? You do need the correct tft file loaded on the Nextion display.? The wrong file for the display will not be recognized by the display.
There are two possible ways to transfer the calibration settings:
1 - use the same Nano and just overwrite the stock program with the KD8CEC program
2 - Record the values you set with the stock software on paper when you set them, and then use the Memory Manager software to write those values to the Nano.
Note:? The Frequency calibration has little impact on the receiver sensitivity.? Frequency adjustment is to ensure that the displayed value is accurate.? The BFO tuning has a HUGE impact on the receiver sensitivity.? ?Mis adjustment of that value can cause the sidebands to be reversed, or the received signal to fall outside of the filter passbands.
I would recommend that you try just the BFO tuning to start, and see if the dial is off.
73
Evan
AC9TU
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Re: At my wit's end with this uBitx
Thanks - great information.
1) not only are the calibrations transferable, my version uses the same locations to read and store the calibrations, so once you have a working calibration, you shouldn't have to recalibrate at all if you decide to use my software
2) no. The stock software doesn't support the manager, and that's not a feature I added
I can't answer 3&4 because I don't have any experience with nextion screens. Related: you'll need to use the KD8CEC software if you use the nextion screen - there's no support for it in my software.
Reed
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Re: At my wit's end with this uBitx
1) not only are the calibrations transferable, my version uses the same locations to read and store the calibrations, so once you have a working calibration, you shouldn't have to recalibrate at all if you decide to use my software
2) no. The stock software doesn't support the manager, and that's not a feature I added
I can't answer 3&4 because I don't have any experience with nextion screens. Related: you'll need to use the KD8CEC software if you use the nextion screen - there's no support for it in my software.
Reed
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Re: UBITX V4, bitx40 misc boards for sale
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Re: At my wit's end with this uBitx
Guys, I need to understand a couple of things because I'm certain that all this is unsuccessful calibration.
- Are the calibration numbers I'm getting from the stock software (6.1) transferable to Reeds software?
- Can I use Bitx Manager to do this?
- Am I using the right file for my 2.8" : ?? Nextion UBITXV5_CEC_V1.200_NX? ?
- Are there other files I should have loaded before this?
Inquiring minds want to know. K7TP
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Re: #bitx40 to buy or trade
#bitx40
Yes, and you replied to my post on your QRZ page.?
Many thanks & best luck always,
Ted
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Re: #bitx40 to buy or trade
#bitx40
Did you see the for sale post earlier today? /g/BITX20/topic/bitx_40_for_sale/75828504?p=,,,20,0,0,0::recentpostdate%2Fsticky,,,20,2,0,75828504Reed
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Looking for a BITX40,? complete kit without case or with, but case not of interest; a special packaging project awaits.? Also in market for a ME40+, 4-State QRP, or similar minimalist 2-4w VCXO QRP CW rig in good working order.? Putting together a kit is to mind-numbing for me at this point but I can mod stuff just fine.
I may be able to trade a widely-upgraded V3 board, 4-line display, and Raduino; still thinking about that but it's not made it into a case of it's own so far.
72,
Ted
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Roger?
Now have a sketch and library installed and looking for cable.?
On Jul 27, 2020, at 2:58 PM, Allard PE1NWL < pe1nwl@...> wrote:
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Hi Ted,
it appears that the github user interface has slightly changed,
Instead of "clone or download", click on the green "Code" button and then choose "download ZIP":
<dummyfile.0.part>
73 Allard PE1NWL
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Hi Ted, it appears that the github user interface has slightly changed, Instead of "clone or download", click on the green "Code" button and then choose "download ZIP":  73 Allard PE1NWL
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search for WB7AVU in QTH or QRZ for sale ads
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Re: At my wit's end with this uBitx
Hi Reed,
I installed your software in a V6 for another ham. Nice job:)
When you get one for V3 and stock display please let me know.
Maybe I can learn enough about the programming top transplant some of your routines into the software I have.
73,
Bill KU8H
bark less - wag more
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On 7/27/20 1:31 PM, Reed N wrote: Stock v6.1 code reverts the calibrations. My version does not.
Reed
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Re: At my wit's end with this uBitx
Stock v6.1 code reverts the calibrations. My version does not.
Reed
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Re: Digital Interface - transformer seems to drastically weaken signal
Hey Evan,
Really I think the only difference between EasyDigi and my setup, is that the Teensy + Audio Adapter takes the place of the sound card.? The added capability of the Teensy is that I plan to (and have previously) implemented standalone DSP filters for transmit and receive in the Teensy.? I'll have a mic input option to the Teensy, with S/W speech compressor, as well as variable width receive filters.? Right now, the part that I'm having issues with is in fact the "EasyDigi" part (i.e. the transformers).
As you noted, yes, the Teensy Audio Adapter is capacitively coupled with 2.2uF capacitors on all of the audio input/output lines.? If I can't figure out this transformer thing, I'll probably just directly connect to the Teensy.
I noted recently that, when transmitting into a dummy load, everything seemed fine (without the transformers installed).? However, when I transmitted through my antenna, I had a terribly distorted audio waveform.? I traced this to the unused wire in the stereo audio cable I was using... when I grounded that unused wire, the distortion went away.? I have a suspicion that issues with RFI are contributing to my woes.
I'm going to try prototyping a quick setup where I (a) add a couple 0.01 uF bypass capacitors at each side of the transformer, and at each end of the audio cable, and (b) use a good, shielded mono audio cable for each of the RX and TX audio connections.? If that doesn't work, then I'll try swapping out one of the El Cheapo 1:1 isolation transformers I'm using, for an ostensibly higher quality Xicon transformer I have lying around from Mouser.? That one isn't a 1:1 transformer (I think it's 4k:600 ohm), but maybe I can use the transformation ratio to my advantage as well (e.g. step down the transmit audio).
Rob KC4UPR
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Wayne KH6WZ/W6
Bob, N1KPR
Ted
Allard PE1NWL