Very cool, good job.? Persistence often pays off.
Think of it as mostly educational, so time well spent.
?
That 160m trace seems to have a strong third harmonic, which makes sense.
The 80m low pass filter would have a corner around halfway between 4 and 7 mhz,
so the 5.6 mhz third harmonic of 160m is sneaking through.
Not much evidence of a second harmonic, as one would expect from a push-pull amp.
Jerry, KE7ER
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On Mon, Mar 5, 2018 at 08:00 am, John wrote:
So it looks like everthing is working fine now, now only have to wait for my antenna tuner as my end fed has some pretty high values on the lower bands.
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CAT Support uBITX Firmware CEC Version 1.04 Release
#ubitx
All CAT Support uBITX Firmware CEC Version 1.04 Release, but?There is no major change compared to version 1.03. I released it for people looking for HEX files. The changes since 1.01 are as follows.- Reduce cpu usage rate- Change BFO Calibration step (50 to 5)- Change CW Frequency Display type??The more accurate frequency is displayed during CWL, CWU Mode.- Optimized source code and reduce program size (97% -> 95%)? I have free up memory space for WSPR on stand alone uBITX For more information, please see the link below. (You can download HEX file and latest version of uBITX Manager from the link below.)
?
-- Best 73 KD8CEC / Ph.D ian lee kd8cec@...
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Re: TDA2822 ill treatment test! Photo of blown TDA
There is no phasing issue with a bridge
On Mon, Mar 5, 2018 at 5:16 PM, Clark Martin <kk6isp@...> wrote: You could just drive both amps in parallel instead of bridge, this would avoid the phasing issue.
But connect an amp output to the ring terminal will still burn it out if you plug in a mono plug, regardless of bridge or parallel.
Has no one tried changing the TDA2822 to the “bridge” configuration??Wired to tip and ring there would be no ground connection and it would work with stereo or mono plug. ( I guess the phasing might be messed up with the sereo phones for voice)
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Re: TDA2822 ill treatment test! Photo of blown TDA
B40, nothing. I accidently gave mine 20+ when a regulator shorted in the worst possibly way. No damage done. With that audio chip I'll be using a much better regulator! Although I may replace it before I power it up. Then I can run a couple of experiments on the original.
Vince.
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On 03/05/2018 10:21 AM, Arvo KD9HLC via Groups.Io wrote: On Mon, Mar 5, 2018 at 07:04 am, Mvs Sarma wrote:
Again I wonder whether our friends who had this failure mode ,
applied any regulated 12V or using 12V or 12-0-12
secondary trafo , rectify, filter and use ( a peak if almost 18V- 1
or 2 diodes drop depending on fullwave and bridge.
Hello, Sarma.
What would blow first if someone plugged a 19V laptop supply into the ?B
or B40 power jack intended for 12V?
--
Michigan VHF Corp.
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Having the NANO board indicates that your BITX-40 is the later version.
Earlier version with analog VFO is identical except for the VFO.
_._
On Mon, Mar 5, 2018 at 4:43 AM, <davesters@...> wrote: How do I tell if my bitx40 has the raduino. It has a nano board so I assume it does.
It was originally shipped in Sept? 17. There was no coil in the center of the board where the display power port plugs in.?
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Re: TDA2822 ill treatment test! Photo of blown TDA
You could just drive both amps in parallel instead of bridge, this would avoid the phasing issue.
But connect an amp output to the ring terminal will still burn it out if you plug in a mono plug, regardless of bridge or parallel.
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On Mar 5, 2018, at 3:16 AM, ohwenzelph via Groups.Io < Ohwenzelph@...> wrote:
Has no one tried changing the TDA2822 to the “bridge” configuration??Wired to tip and ring there would be no ground connection and it would work with stereo or mono plug. ( I guess the phasing might be messed up with the sereo phones for voice)_._,_._,_
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Hello Jerry,
My bad, indeed on the probes there is a lttle switch and the one I used yesterday was indeed set to 10x. So the mentioned voltages should indeed be 10 times higher. That would make more sense with the to be expected power levels.
Here measurement of my cw signal at 160m. Will need some filtering for sure.
CW at 80m. Looks a lot cleaner.
So it looks like everthing is working fine now, now only have to wait for my antenna tuner as my end fed has some pretty high values on the lower bands.
Thanks for you help.
John
KG5WJQ
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i ordered Jan 5th and got my notice that it shipped today Mar 5th
Jim
wb4ctx
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Replacement rotary encoder
I am playing with different raduino replacements, and some require a different digital wiring harness. As I do not wish to continuously solder / resolder the encoder, I wish to get some replacement encoders to setup several harnesses.
Does anyone know where I can purchase 24 pulse encoders at a less than ridiculous price? Preferably in VK land, but I suppose that I am used to waiting for delivery now!
Cheers
Chris, VK7HCH
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Re: TDA2822 ill treatment test! Photo of blown TDA
On Mon, Mar 5, 2018 at 07:04 am, Mvs Sarma wrote:
Again I wonder whether our friends who had this failure mode , applied any regulated 12V? or using 12V or 12-0-12
secondary? trafo , rectify, filter and use ( a peak if almost 18V- 1 or 2? diodes drop depending on fullwave and bridge.
Hello, Sarma. What would blow first if someone plugged a 19V laptop supply into the ?B or B40 power jack intended for 12V?
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Re: Large Heat Sink of ubitx IRF 510's
Walter, A single heatsink is fine, but ensure you are using transistor insulating hardware.
Marco - KG5PRT?
On Mar 5, 2018 9:07 AM, "Walter" < W9KJO@...> wrote: Is it ok to put one large heat sink in for both IRF 510's or do the heat sink have to be separated from each other?
Thanks for your help
--
73, W9KJO
Walter
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Large Heat Sink of ubitx IRF 510's
Is it ok to put one large heat sink in for both IRF 510's or do the heat sink have to be separated from each other?
Thanks for your help
--
73, W9KJO
Walter
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Re: TDA2822 ill treatment test! Photo of blown TDA
Thanks Arvo.
?Again I wonder whether our friends who had this failure mode , applied any regulated 12V? or using 12V or 12-0-12 secondary? trafo , rectify, filter and use ( a peak if almost 18V- 1 or 2? diodes drop depending on fullwave and bridge.
On Mon, Mar 5, 2018 at 7:34 PM, Arvo KD9HLC via Groups.Io <arvopl@...> wrote: On Mon, Mar 5, 2018 at 05:41 am, Mvs Sarma wrote:
iMHO? the whole issue cropped up as members tried to use mono plug that has grounded the ring connection, thus short curcuiting the coupled Audio, where by the Amplifier started burning.
Hello, Sarma..
There were reports of these WX devices failing spontaneously, without any short circuiting.
The simplest explanation is that hfsignals ordered a batch of TDAs that are not capable of proper behaviour with a 12V supply.? One guess is that the WX TDA chips are intended for 3-5 V.? Maybe none of the normal market for the WX uses 12V anymore.? It does not help that no one can seem to find any datasheet for the exploding version of the TDA.
The fastest way to clear this up is for the hfsignals person who contracted for the WX TDAs to reach out to the seller and get clear definition of what exactly these parts are, and maybe publish a datasheet.
Then people could make an informed decision about what to do with theirs.? Some might decide replacing is the best, others might put a 7805 in line with it, some might try resistors or heatsinks or smaller capacitors.
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Re: uBITX Sketch on an Arduino Uno R3?
#ubitx
You can make any pin work with an interrupt using the attachInterrupt() function. The Uno and Nano only have two external interrupt pins (2 and 3), but the rest can also be used for interrupts. External interrupts have their own interrupt vector where other pin interrupts must share a vector. The attachInterrupt() function hides the bit masking that has to take place to determine which pin triggered the interrupt. There's some overhead with pin interrupts that external interrupts don't have, but will go unnoticed if the encoder is being turned by a human rather than a motor. Google "Arduino attachInterrupt" and you should find some sample code you can try.
Jack, W8TEE
From: Ryan Flowers <geocrasher@...>
To: [email protected]
Sent: Monday, March 5, 2018 4:34 AM
Subject: [BITX20] uBITX Sketch on an Arduino Uno R3? #ubitx
Howdy all,
I'm trying to get the uBITX sketch working on an Arduino Uno R3, because it's what I have. The problem is that the rotary encoder is on A6 and A7, but the Uno doesn't have A6 and A7, only A0-A5. I'm trying to move the encoder to the digital pins, and I was able to get the encoder button working, but the encoder itself does not. Can anyone offer suggestions on making this work?
Thanks!
--
Ryan Flowers - W7RLF
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?Although i don't do it often, we have FLDIGI on about 8 raspberry pi's in our local ARES group.? ??
Gordon
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What are you running FLDigi on?? A Win/PC, Linux/PC, or something like a Raspberry Pi?
Curious how many folks are running FLDigi on Ras-Pi because that's what I'm working to integrate into a field-portable station with my uBitX right now.
Thanks
Chuck (N1KGY)
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Re: TDA2822 ill treatment test! Photo of blown TDA
On Mon, Mar 5, 2018 at 05:41 am, Mvs Sarma wrote:
iMHO? the whole issue cropped up as members tried to use mono plug that has grounded the ring connection, thus short curcuiting the coupled Audio, where by the Amplifier started burning.
Hello, Sarma.. There were reports of these WX devices failing spontaneously, without any short circuiting. The simplest explanation is that hfsignals ordered a batch of TDAs that are not capable of proper behaviour with a 12V supply.? One guess is that the WX TDA chips are intended for 3-5 V.? Maybe none of the normal market for the WX uses 12V anymore.? It does not help that no one can seem to find any datasheet for the exploding version of the TDA. The fastest way to clear this up is for the hfsignals person who contracted for the WX TDAs to reach out to the seller and get clear definition of what exactly these parts are, and maybe publish a datasheet. Then people could make an informed decision about what to do with theirs.? Some might decide replacing is the best, others might put a 7805 in line with it, some might try resistors or heatsinks or smaller capacitors.
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On Mon, Mar 5, 2018 at 04:57 am, Charles Ayers wrote:
What are you running FLDigi on?? A Win/PC, Linux/PC, or something like a Raspberry Pi?
Curious how many folks are running FLDigi on Ras-Pi because that's what I'm working to integrate into a field-portable station with my uBitX right now.
Thanks
Chuck (N1KGY)
I have a Pi3 that runs Fldigi with no problems.? However RMS Express will not run on a Pi.? So I abandoned the Pi3 for a laptop.? My laptop, running Win 7 will run indefinitely on my solar system with the no RMI problems charger I built for charging the laptop.? Since I have solar setup for both my QTH and my Mobile I have a reliable portable solution for both situations. Plus I'm not real good at Linux programming and have been frustrated with three different books I purchased to learn the protocol.? It was hard just getting Flamp loaded and running due to my lack of knowledge in Raspbian or Linux.? So Windows is far easier to load up software and the frequent updates that come with Fldigi, Flmsg, and Flamp. -- 73, W9KJO Walter
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Re: TDA2822 ill treatment test! Photo of blown TDA
We are genera;;y habituated to listen thro both the ears.
?Thus the style to listen to mono symultaneously on both ears. Otherwiase one ear remai\ns silent to radio listening. iMHO? the whole issue cropped up as members tried to use mono plug that has grounded the ring connection, thus short curcuiting the coupled Audio, where by the Amplifier started burning. We can always have a small 10 ohm resitor on the battery line and decouple that to prvent buring , if it is beleived tobe due to 13.5, 13.8 or 15V poser supply. Sometimes I wonder whether really these chips are that bad they blast off into pieces. I had such experience wit5h TDA but did not feel it due to original design. I am sure that I did mishanle it accidentally shorting some pins. ?I would appreciate memnbers to recolle3ct the events just before the chip got fried. regards ?sarma ?vu3zmv
On Mon, Mar 5, 2018 at 6:58 PM, John <jjczon@...> wrote: On Mon, Mar 5, 2018 at 03:16 am, ohwenzelph wrote:
Has no one tried changing the TDA2822 to the “bridge” configuration?
Wired to tip and ring there would be no ground connection and it would work with stereo or mono plug. ( I guess the phasing might be messed up with the sereo phones for voice)
?This is my replacement TDA2822L ordered through eBay. In the package was a folder from Tayda.
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If you have the 16x2 LCD displaying the freq, etc., then you have the Raduino. The toroid is not required.
73 Ken
On Mon, Mar 5, 2018 at 6:43 AM, <davesters@...> wrote: How do I tell if my bitx40 has the raduino. It has a nano board so I assume it does.
It was originally shipped in Sept? 17. There was no coil in the center of the board where the display power port plugs in.?
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Arvo W0VRA