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Re: LED Power Output Indicator
#ubitx
Please don't assume a 3.0 volt LED and reasonable brightness. As I already stated,
I used a clear red LED and it is nice and bright and fun to watch. I have received all the information I was looking for.?? Thank you. It works great just the way it is.? "If it aint broke, don't fix it." -- Lee - N9LO? "I Void Warranties" ? |
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Re: Hijacked: C vs C++
w7hd.rh
¿ªÔÆÌåÓýIt was a simple printf("Hello world.\n") statement as the entire content.? Probably the printf is what caused the overhead.Ron W7HD On 07/03/2018 08:31 PM, Jack Purdum via
Groups.Io wrote:
-- Ron W7HD - NAQCC#7587 OMISS#9898 KX3#6966 LinuxUser#415320 Editor OVARC newsletter |
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Completed my QCX
#ubitx
Completed my uBitx and my own home brewed enclosure. ?Nothing fancy but all built by hand and a drill and Dremel with a cutting disk and sanding drum. ?Still have to do some mods like the s-meter and agc.
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Re: experience with Sunil VU3SUA's enclosures
#ubitx
Hi Mike
Your case is in the lot of 25 cases that are being shipped tomorrow. Apologies for the delay, it will be shipped by DHL. I mist your email as I have couple of email addresses..? Thanks and regards Sunil |
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Re: v4 pop-fix on a v3 board
#ubitx
Nigel G4ZAL
@Mark, not sure on sidetone as I haven't checked and I understood swapping out the R70 resistor rectified the sidetone problem? My shack/man cave is now partly cleaned out ready for a mains wiring and network cabling fit out so the uBitx is sidelined for now... |
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Re: Elmer in Atlanta GA with working BITx40 RFSignals Kit working
There is a file here with the voltages to be expected for a BitX40. A common failure point is the Q13 transistor, which is what mine had before I installed the back-to-back diode mod. I actually found the problem watching a video from VK3YE. Google "VK3YE BitX40 repair".
=Vic= |
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Re: My uBitx with 5v mod
#ubitx
Nigel, where did you get the case? It looks ideal.
Colin - G8FRA/M5FRA |
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Re: Who has uBITX with Nextion display in action pictures ?
¿ªÔÆÌåÓýHi Joe ? Thanks for the info, I¡¯ll look out for it. Is yours a standard or enhanced display? ? 73 de Charlie GI4FUE ? From: [email protected] [mailto:[email protected]] On Behalf Of Joe ? Hi, ? I am running a 3.2e and a 7 inch The code is working fine. I will be releasing the 7 inch .hmi code with enhanced for the larger screen by the end of the week or sooner. Probably on Also a new youtube demo ? 73 Joe VE1BWV On Tue, Jul 3, 2018, 8:35 PM Art Olson <olson339@...> wrote:
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Re: Who has uBITX with Nextion display in action pictures ?
¿ªÔÆÌåÓýThanks Art ? That¡¯s it¡I¡¯ll follow this development with interest. ? Charlie GI4FUE ? From: [email protected] [mailto:[email protected]] On Behalf Of Art Olson
Sent: 04 July 2018 00:36 To: [email protected] Subject: Re: [BITX20] Who has uBITX with Nextion display in action pictures ? ? Charlie ? His name is Joe Basque, VE1BWV ? Here is a youtube link ? ? 73 Art N2AJO ? From: [email protected] [mailto:[email protected]] On Behalf Of Charlie Morrison ? I saw a post recently (cant remember where ) of someone who is developing a tft file for a 7In nextion¡cant find it now, but the 7 in displays are becoming much cheaper and could be mounted on top of the ubitx case, similar to the PIHPSDR done by Scott, WU2O¡anyone remember who it was? ? Regards Charlie GI4FUE ? From: [email protected] [mailto:[email protected]] On Behalf Of Art Olson via Groups.Io ? Kees ?
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Re: Hijacked: C vs C++
On critical code, I prefer the direct correspondence of a vanilla C program to its executable.
With C++, there are too many unseen gears turning to implement all those cool features. If I want easy coding of complicated algorithms and don't care about space or time, I write in python. It's clean and concise and powerful, I get far fewer coding errors than when writing in C/C++. If there are time critical functions to implement, write them in C and?call them from the?main python program. Here's an old Unix fortune cookie from 40 years ago: "The day-to-day travails of the IBM programmer are so amusing to most of us who are? fortunate enough never to have been one? -- like watching Charlie Chaplin trying to cook a shoe."
We can argue if that applies better to the C or C++ programmer. Jerry, KE7ER he day-to-day travails of the IBM programmer are so amusing to most of us who are fortunate enough never to have been one |
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Re: TX frequency? of uBitx at CWL and CWU mode
#ubitxcw
Andy V. Borisenko
Thank you Ian!
Now I'm at work, I'll definitely try in the evening. p.s.?I measured the value of the DDS frequency and changed it in a file ubtx_si5351.ino v1.08. I found a way to do it without using devices. now with the calibration I have no problems! |
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Re: experience with Sunil VU3SUA's enclosures
#ubitx
I like the one I received from Sunil. Just like the uBITX, it allows one to use the parts that came with it, or buy other parts. Mod it the way you want. I was pleased that I got the parts to get up and running, now I can customize it to suit me, and I have started. I have knobs from a Heathkit, I've moved the board since I want to use a Nextion display, and I have plans to use the supplied parts as I wish, to create a connector for using the Signalink. Or I may wire up the EasyRig and put an onboard usb hub.
I'm happy with my case. 73, Tommy |
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Re: Elmer in Atlanta GA with working BITx40 RFSignals Kit working
Dennis Yancey
Probably a wiring issue on the mic jack. You may need to examine in
f your moc uses tip and sleeve or ring and sleeve for the electret. If you made your own with supplied condenser element, you need to check your wiring. Make sure you used the correct pin for ground. |
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Re: LED Power Output Indicator
#ubitx
Simple as it is, could be I don't fully understand the circuit.
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But I don't think you get a voltage doubler unless you add the extra cap in series with the 5.6k resistor as suggested in the last paragraph of my previous post? (ignore the garbage after my signature). In my calculations, I'm assuming an LED forward voltage of 3.0 volts. That's typical of the very bright white light LED's, 2 volts is more typical of a little red LED. But the extra volt is probably needed to see anything at all anyway, given the 5.6k resistor and that diode conduction occurs only on RF tips.? ?Even in a very dark room. But should be reasonably bright with 5 or 10 watts. Jerry On Tue, Jul 3, 2018 at 08:25 pm, R. E. Klaus wrote:
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Re: Hijacked: C vs C++
Jack Purdum
Wow, I would never expect a 50:1 difference. True, C++ does drag in more overhead, but it shouldn't be that much. The gcc compiler is behind the Arduino IDE. Try using it to write a C versus C++ program and see if that difference holds. Some compilers bring in the entire I/O library if you use printf(). That shouldn't happen in the Arduino world. Take the code you used to come to those conclusions, but do it with the Arduino IDE. I'd love to hear the results. I'd be happy to run the test if you care to send the source code. Jack, W8TEE
On Tuesday, July 3, 2018, 11:07:59 PM EDT, w7hd.rh <w7hd.rh@...> wrote:
Turbo C and Turbo C++ at first, then gcc and g++ later.? Without
a lot of compiler switches added in. It certainly turned me off C++ coding.? I still program in C and shell scripts whenever possible.? I've written a LOT of programs over the last 30 years and can crank out a working C program in a few hours. Ron W7HD On 07/03/2018 07:05 PM, Jack Purdum via
Groups.Io wrote:
-- Ron W7HD - NAQCC#7587 OMISS#9898 KX3#6966 LinuxUser#415320 Editor OVARC newsletter |
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Re: LED Power Output Indicator
#ubitx
I'd recommend placing it before the transmit LPF, not at the antenna port.
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The diodes will create a bit of harmonic content that the LPF's can remove for us. I think you could remove the lower 1n4148 and get the same performance. Then it's just a diode detector, like found in some AM radios. The LED should start turning on (in a dark room) at 3.0+0.6 = 3.6v peak. That's 3.6*0.707 * 3.6*0.707 / 50ohms? = 3.6*3.6/100 = 130mW I don't think the lower left 1n4148 adds anything except perhaps clipping the low going tip of the RF more or less the same as the high going tips get clipped by the other diode. This might reduce some of the harmonic content, but the LPF would do a much better job.? If the 5.6k series resistor also had a 0.01uF cap in series with it, then you should get double the DC voltage to the LED making this usable with lower power rigs.? The LED would start turning on at around 3+0.6+0.6 = 4.2 volts pk-pk,?or 2.1v peak, or 2.1*2.1/100=44mW. A low going RF tip will cause the lower-left 1n4148 to conduct, charging up that new series cap.? So the voltage into the second 1n4148 will be an AC waveform that rides up on top of ground instead of being centered on ground. Jerry That lower left 1n4148 doesn't really do anything except maybe clip the low going peaks in a manner almost symmetrical with the high going peaks? that get clipped by the other 1n4148. On Tue, Jul 3, 2018 at 06:41 pm, Lee wrote: I ran across this when looking for an transmit indicator for my Small Wonder Lab PSK31.? The original resistor was 2.2K but our radios put out more than double so I changed the resistor to 5.6K.?? Maybe someone with more electronic knowledge than me has better suggestions.?? It lights up bright and solid for CW and you an watch your modulation on SSB.?? I can really see the difference when I switch in my SSM2167 module. |