Re: RF power chain mods and improvements..
The good news is there are enough control signals to select either 2 or 4 band filters.
Where to put them and also add gain to make up for insertion loss are issues.
If only one band its easy.? The filter and detect that no other than 30mhz low pass is selected.
That takes a transistor and a relay.? And a band pass filter for 10 or 15M, pick one.
Still needs more gain to get power out on 10M then.? A MMIC with 10-12db gain good
for +5 dbm or more would do fine.
Allison
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Like I said, I don't know anything about a Mac, but it appears that you have multiple copies of the project. I'll tell you how I have my code laid out, and maybe you can do something similar on the Mac.
First, my Arduino working directory is on Drive E, as that's my "big" drive. I have a directory at the root of that drive that reflects the version of the IDE. Currently, this is Arduino1.8.5. So, my compiler is in E:/Arduino1.8.5. (I have Arduino versions of the IDE back to 1.0.5 and they are all still fully functional, which allows me to backtrack if I need to.) This is what the main Arduino compiler directory looks like::
 The top line in the figure shows we are looking at the contents of directory E:Arduino1.8.5. What you see in the photo is the "standard" Windows Arduino installation. If you look in the libraries subdirectory in the figure above, you'd see this:
 Again, the top line shows we are looking at E:/Arduino1.8.5/libraries. I have 117 libraries installed on my system. Note, my project files are nowhere to be seen in this directory.
My project files are located on drive E, but in a directory named ?BITXNew/Software/JackAlCode. I'm currently working on Version 12 of the code, so this is what you see in my project directory:
 Note the top line in the figure: E:/ ?BITXNew/Software/JackAlCode/JackAlV012. NOTE: There are NO subdirectories in the project directory, only the main project file (the ino file that holds setup() and loop()), source code files (*.cpp), or header files (*.h)...No subdirectories.
I have no clue if this would be useful info on a Mac, but I would think it should be laid out in similar fashion on a Mac.
Jack, W8TEE
On Tuesday, June 5, 2018, 1:51:42 AM EDT, kj6etl <pa1zz@...> wrote:
I renamed the files excactly like the popup states and still the same error...?
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Re: The new uBITX boards are here
You 'picked it up', eh??
Well on a hot double date in my '48 Chevy I drove off with one accidently! No damage done.?
Don't recall watching the movie! ?
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Re: Ubitx factory firmware support CAT control?
#ubitx
The newer factory firmware downloads contain CAT and it works well.
Tom
AB7WT
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You may want to check this out:
Ron W7HD
On 06/04/2018 10:02 PM, Ashhar Farhan
wrote:
Fortunately, the way git (the software used by
github) is structured, it doesn't really need a server! git is a
distributed source control system. that said, it does have?
server mode that can quickly be setup anywhere on even a
raspberry pi.?
If Microsoft makes any controversial move, I can see the
repositories quickly move away from them. That said, I am not
sure that they have the lee-way to do much in terms of
changing licensing of the hosted repositories.
- f
--
Ron W7HD - NAQCC#7587 OMISS#9898 KX3#6966 LinuxUser#415320
Editor OVARC newsletter
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Hello,
finally have 20x4 lcd I2C
and conect SDA on D4, SCL on D5
working with UBITX_CEC_V1.08I but not working.
If try with 20x4 paralel conect like on original uBITX and UBITX_CEC_V1.08P working fine
What mistake I was made.
Bye Matjaz
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The Bitx40 Raduino used to use 2 connectors with wiring harnesses.? ? The uBITx uses a connector and a row of pins.? The pins eliminate the need for the signal wire harness.?? Otherwise, it is basically the same.
Marco - KG5PRT?
According to the website, the only difference in the Raduino¡¯s is the firmware. Are you saying this is not the case?
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Re: Building homebrew ubitx: Need pre-v3 schematic PDF. Also, source for 45M15 (45 MHz IF) filter?
Thank you for the information -
Is the 45 Mhz IF filter (or any of it's variants that could work, including SMD) considered current factory production? Everything else in ubitx seems to be contemporary, but this part might have lifetime issue.
Ebay sources appear to be disposition of surplus parts in small quantity only. Rockby (AU) has 8 on hand when I checked this AM and I could not fill the minimum order cost.
Checking US mainstream distributors (as of 5 June 2018):
Mouser: ECS ECS-45K20A (currently shows 72 stock, none on order, no factory lead time estimate, and no other 45 MHz crystal filters in any package in stock.)
Digikey: Three ECS offerings (SMD only) were expensive (tens of USD)
Newark: None of any type
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This is a topic that comes up fairly regularly.? When you get it all figured out it would be helpful to others if you added a wiki page.
--
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Yes, I have realized that. I have asked a local amateur and he told me that about 100 km from here there is a skilled ham with all the equipment needed. Hopefully he will be of help. I will let you know.
Thanks for all your efforts!
H?kan
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Re: Ideas for AM, NB FM Demod and CW filter board
Yes that is true but we must not forget that Bitx and uBitx are affordable for a beginner amateur radio and that adding a lot of additional features will confuse more than one if the price was a lot most important. What makes Bitx interesting is the price that allows a beginner to start and a seasoned enthusiast to experiment with many things. We are still in the QRP traffic domain. Or we must add these features in the form of additional cards that can be purchased or manufactured later. I think the most desirable goal would be to make a modular package that everyone can change as they see fit.
That's just my opinion
73 QRO
@Gilles,
Lets not forget that in some countries HF equipment is quite expensive and therefore many of the new radio enthusiasts are starting in CB 27Mhz AM/FM.
In my opinion this modes are also quite useful.
Also on amateur radio level in 10 meter band in the summer when the propagation is open many nice QSOs can be made in FM around 29600Mhz.
So in these case why not to have AM/FM
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Re: Ideas for AM, NB FM Demod and CW filter board
FM is used on 29 Mhz!
Raj
At 05-06-18, you wrote:
toggle quoted message
Show quoted text
Hello
Questions to ask:
Is the AM still used at amateur radio level
Is the FM used in the HAM band, except that the uBitx attacks a 144 or
430mhz transverter?
73
2018-06-05 12:44 GMT+02:00
<tutdavid@...>:
- Hi,?
- Yes I think this would be a great improvement to implement also AM/FM
to the uBITX.?
- Does anyone have some ideas ?
- Thanks !
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Re: Ideas for AM, NB FM Demod and CW filter board
@Gilles,
Lets not forget that in some countries HF equipment is quite expensive and therefore many of the new radio enthusiasts are starting in CB 27Mhz AM/FM.
In my opinion this modes are also quite useful.
Also on amateur radio level in 10 meter band in the summer when the propagation is open many nice QSOs can be made in FM around 29600Mhz.
So in these case why not to have AM/FM
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Take some help Hakan! many here who are your age and I am only a few years younger!
Raj
toggle quoted message
Show quoted text
At 05-06-18, you wrote: I have a little more than 0.6v across base and emitter on all of them. 7.7v across collector and earth on Q10 and Q30 and 11.9v on the rest. Seems ok.
I have only unsoldered and ckecked one trifilar (T3). No short between windings. It was a pain for an old man with not so good eyes anymore and used to vacuum tubes..
H?kan
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Re: Ideas for AM, NB FM Demod and CW filter board
Hello
Questions to ask: Is the AM still used at amateur radio level Is the FM used in the HAM band, except that the uBitx attacks a 144 or 430mhz transverter?
73
Hi,?
Yes I think this would be a great improvement to implement also AM/FM to the uBITX.?
Does anyone have some ideas ?
Thanks !
|
Re: Ideas for AM, NB FM Demod and CW filter board
Hi,?
Yes I think this would be a great improvement to implement also AM/FM to the uBITX.?
Does anyone have some ideas ?
Thanks !
|
According to the website, the only difference in the Raduino¡¯s is the firmware. Are you saying this is not the case?
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I have a little more than 0.6v across base and emitter on all of them. 7.7v across collector and earth on Q10 and Q30 and 11.9v on the rest. Seems ok.
I have only unsoldered and ckecked one trifilar (T3). No short between windings. It was a pain for an old man with not so good eyes anymore and used to vacuum tubes..
H?kan
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Re: RF power chain mods and improvements..
Ok. To attenuate spurs at an acceptable level we might add a high pass filter for the 10m band. However for the 15 and 12m band I don't see an easy solution
Il 05/giu/2018 06:19, "Tim Gorman" < tgorman2@...> ha scritto: Arv,
This is how I've always operated my linear amplifiers. Tune for max in
CW and then mark that level on the oscilloscope. When in SSB never go
above that level with your modulation. It's a pretty conservative way
to operate but it's also the easiest. You don't have to worry about
trying to read a trapezoid display for linearity!
tim ab0wr
On Mon, 4 Jun 2018 15:20:24 -0600
"Arv Evans" <arvid.evans@...> wrote:
>As long as the microphone port audio input is below 45
> millivolts the spurs seem
> to be down at least 50db, but can be pushed even further down by
> reducing the audio
> level to around 32 millivolts.? This seems to be where oscilloscope
> peak-to-peak RF level
> is about the same as when using CW mode.
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Re: micro bitx: strong signals from broadcasting stations
That can be removed with a high pass filter especially if you don't mind for the 160meters band. It can be done with three small toroids and high voltage ceramic capacitors. Just put externally. You might also try a notch filter that eliminates the offending frequency. Of course all this assumes that the MW broadcast does not emit spurs on the HF, in this case you could not do much
Il 05/giu/2018 07:26, "vu3jyt" < vu3jyt@...> ha scritto: The signals from MW broadcast.
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Raj vu2zap