Re: BITX QSO Afternoon/Evening, Sunday, April 22, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.
I listened between 7 and 7:20, and heard some signals, but nothing out of the noise. i called CQ Mico Bit X several times. Thought I heard a response, but Noise level is high here on the Border line, and I could not make out a call.? Denny AD3O
On Mon, Apr 23, 2018 at 9:09 AM, Skip Davis via Groups.Io <skipnc9o@...> wrote: Thanks for trying Dave there was QSB so occasionally I couldn¡¯t hear both of you and when the carrier came on it made it difficult. At least I know my uBITX is getting out. I was using a folded dipole cut for 20mtrs, loaded with the T1 ATU in a inverted V configuration. I still need to finish building the 40mtr version and get it up in the air.? I¡¯m located in western NC so we should be able to work each other without any problem if propagation holds up. Hi Skip and all,
Worked AI4OT Charles, WA4THR Vic, N4DR Marc and VE3THR Tom. All between 750 to 840 miles distant from my QTH.
I heard you one time and came back but no response.?
Am using a homemade coil loaded dipole that is resonant on both 40 and 80. Using recycled 75 ohm television grade coax.
Dave?
K0MBT
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A while ago I built a 4SQRP group HiPerMite CW filter in a mint tin to put between my headphones/speaker and my receivers.? There are others out there, but this one is a proven performer and I'm very happy with it.??
Dan, W2DLC
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Ehhh! Listening to cw with a 2.someKHz filter is good for you! It will hone your cw listening skills and let you learn to pick the right signal out :-)?
In all seriousness, Gordon¡¯s suggestion of an audio filter is a good one. While it¡¯s not really the same as a filter in the receiver, they¡¯re pretty good¡or can be¡and certainly can be very effective. I reckon that a DSP-based filter would be a bit beyond the capability of the Arduino. Also probably not exactly cost effective as compared to the rest of the radio.?
Do remember this is a really low-cost radio, and you probably won¡¯t get Icom performance, or probably not even Xiegu performance, out of it, though I¡¯m sure what you will get will be pretty decent¡especially given how popular the rig seems to be.?
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On Apr 23, 2018, at 11:53 AM, Gordon Gibby < ggibby@...> wrote:
Just add an audio filter to achieve whatever bandwidth you prefer would be my suggestion
I've heard that the ubitx doesn't work very well for CW due to being too wide in the receiving end. How are some of you correcting this? Particularly, how can someone who can handle a soldering iron but is not an electronics whiz, adapt the ubitx for practical
CW operation?
Thanks and 73
Brady KD8ZM
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Re: Teensy 3.5/3.6 upgrade for uBITX
I doubt there's any non-volatile memory on the RPi other than the SD card,
as that involves more process steps when building a CPU chip.
Here's an 8 Gbyte SD card for $4.99:??
So for $10 you could get an RPi Zero plus that SD card with about 250,000 times as much flash as we have on the Nano.
Additional reasons the RPi's are so cheap for what they offer:
? Created and built by a non-profit for educational purposes
? The same parts are also used in a few hundred million cheap feature phones
Jerry
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On Mon, Apr 23, 2018 at 08:11 am, Jack Purdum wrote:
Good point, as I think the op sys and many other files are stored on the SD card.
?
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Just add an audio filter to achieve whatever bandwidth you prefer would be my suggestion
toggle quoted message
Show quoted text
I've heard that the ubitx doesn't work very well for CW due to being too wide in the receiving end. How are some of you correcting this? Particularly, how can someone who can handle a soldering iron but is not an electronics whiz, adapt the ubitx for practical
CW operation?
Thanks and 73
Brady KD8ZM
|
I've heard that the ubitx doesn't work very well for CW due to being too wide in the receiving end. How are some of you correcting this? Particularly, how can someone who can handle a soldering iron but is not an electronics whiz, adapt the ubitx for practical CW operation?
Thanks and 73
Brady KD8ZM
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Re: Teensy 3.5/3.6 upgrade for uBITX
Jack,
I am looking forward to the unveiling.
73, Kevin VK3DAP / ZL2DAP
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Re: Teensy 3.5/3.6 upgrade for uBITX
Doug: Good point, as I think the op sys and many other files are stored on the SD card.
Jack, W8TEE
On Monday, April 23, 2018, 10:52:05 AM EDT, Doug W <dougwilner@...> wrote:
While this has no bearing in the RPI vs Teensy discussion as it applies to both and is a further diversion from the original subject, one thing I am guilty of when throwing around the virtues of a $5 Pi is forgetting to mention to people that are not familiar with it is that it also requires a SD card that typically costs more than the Pi Zero itself.? I bring this up for any one following along that is on a tight budget.? To borrow from Jack's example of someone on a lawn mower budget, you might need to mow one more lawn than you were planning this summer.
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Re: Teensy 3.5/3.6 upgrade for uBITX
While this has no bearing in the RPI vs Teensy discussion as it applies to both and is a further diversion from the original subject, one thing I am guilty of when throwing around the virtues of a $5 Pi is forgetting to mention to people that are not familiar with it is that it also requires a SD card that typically costs more than the Pi Zero itself.? I bring this up for any one following along that is on a tight budget.? To borrow from Jack's example of someone on a lawn mower budget, you might need to mow one more lawn than you were planning this summer.
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Re: Teensy 3.5/3.6 upgrade for uBITX
I've got a Teensy 3.2, it looks very promising.
The 3.6 has floating point, which would make porting SDR libraries much easier.
The RPi's run linux with X-Windows, many popular SDR programs have already been ported.
Though RPi Zero at $5 might not have the horsepower to run X-Windows and all fast enough
without changes to the SDR program, so this sort of thing might better be done on one of the
bigger RPi's.? ?All the RPi's suck more power than the Teensy's, need to bring your own ADC's.?
Yup, the ATMega328P has a Harvard architecture, as Jack well knows.
Program memory (flash) and data memory (RAM) are in separate address spaces,
programs we write cannot easily read data out of flash.
For this reason, things like string literals are copied from flash to RAM at boot.
So something like lcd.print("Hello World") will use up RAM unless you resort to
the tricks shown here:? ?Not needed when programming most machines in C.
Jerry
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On Mon, Apr 23, 2018 at 06:02 am, Jack Purdum wrote:
I realize the power the Pi has and I'm familiar with compiler design and grammars, as my old software company built and marketed its own C compiler for DOS back in '80s...without yacc! Al and I have been through a pretty rigorous ?C decision process for our Jackal project, looking at Pi, Mega2560, Due, Mega Zero, and the new Protoneer board to replace the Raduino/Nano board. We settled on the Teensy 3.6. One of our goals is to encourage hacking by those who are already familiar with the ?BITX, and that suggested sicking with a processor that could run in the Arduino IDE. The Teensy 3.6 has
- 180 MHz ARM Cortex-M4 with Floating Point Unit
- 1M Flash, 256K RAM, 4K EEPROM
- Microcontroller Chip (PDF link)
- USB High Speed (480 Mbit/sec) Port
- 2 CAN Bus Ports
- 32 General Purpose DMA Channels
- 22 PWM Outputs
- 4 I2C Ports
- 11 Touch Sensing Inputs
and costs a little less than the Pi. The FPU is important in many SDR's that use FFT algorithms, and the Teensy has a very good FFT library. It also has a terrific audio library that we are using in our filter elements. However, to me, the critical elements were that the 256K of SRAM removes the real bottleneck of the Arduino family and there are a host of relevant libraries for the processor. Atmel needs to get its act together and boost its processor resource base if it wants to stay competitive. (I taught an assembler course on a Z80 back in the '80s and, you're right, the 328 reminds me of it although the memory architecture's a little different.)
Anyway, we experimented with Pi and other processors for over a month before we committed Jackal to the Teensy. We made the right choice for us. Al and I will be showing Jackal at the FDIM conference...I think it's pretty cool and brings a lot to the table. That's not to say that someone shouldn't give Pi a try as a Raduino replacement. It's just not for us.
Jack, W8TEE
?
?
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Re: Erratic tuning with my new uBitx
I too run WeeWx on a raspberry pi running raspian linux. Works fine! I've modified it give me 24 hour rain and to give me yesterday's high temp. Congrats! tim ab0wr On Mon, 23 Apr 2018 05:20:00 -0700 "w7hd.rh" <w7hd.rh@...> wrote: I too run Linux.? I use WeeWx for my weather station software, which
is written in Python and works very nicely under Linux Mint 17.3.
See my version at my website <>.
If you also wish to run FLDIGI, then my script
<> will help you
out with instructions here
<>.? It allows
you to use a menu to compile FLDIGI programs.
Ron W7HD
On 04/23/2018 01:53 AM, Chris Clarke wrote:
Thanks Michael.
Yes, I use Linux for everything I can. I only use XP where there is
no convenient alternative and usually pull out the internet dongle!
Had Windows 7 for a short while until it screwed up, and at that
point I decided to go with Linux (whose main issues are my scanner
and my weather station software, but really I need to sort them
out. I do use XP for Ian's uBITx Memory Manager for the time being,
not having yet had the urge to use WINE ... I guess that's another
milestone I need to reach!
Chris
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Re: Erratic tuning with my new uBitx
Hi Chris,
Just for your info, my ¦ÌBITx, as delivered, was -75 Hz off.
Calibrated it and now it is +/- 3Hz.
My IC-7300, after similar calibration, is less than +/- 1 Hz.
Lets say, half an order of magnitude better.
73 Nikos SV1IYF
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Re: UBITX Assemly Wiki Page
#ubitx
I am putting my radio together and almost to the point of needing your wiring diagram.? Your colored wires make it look so easy and less confusing.? Fantastic work.? Thank you.? I have 1 request.?? Could you maybe enlarge the microphone wiring to fit the open space and darken the lines.?? It would make it easier on us with old eyes.?
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Sergio,
Check Raduino to BITX40 connections.
Raudino RED to BITX BROWN wire
Raduino BROWN to BITX BLACK wire
Raj
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At 23-04-18, you wrote: Uploaded software!
First the frequency was from 7,000 to 7,500 now 7,000 to 7,300
But nothing has changed! :(
He receives nothing! Only on some frequencies a bit of QRM
The background noise is left, I do not know if you had seen the video
I checked all the solders, all the different frequency coils ...
Nothing! He receives nothing! :(
It seems that the antenna is not connected! With or without it changes nothing!
Sergio
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Re: UBITX Assemly Wiki Page
#ubitx
Very nice diagram Bob that will be very useful for new uBITX owners.?
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On Apr 23, 2018, at 08:30, w4rjp < pearsall20@...> wrote: Patrick:?? Your idea of a stock uBitX wiring page is great.? I really like Mike ZL1AXG's website as it keeps me up-to-date with mods/issues/summaries/etc, but a? "stock" assembly page is important for uBitX newbies.? Received my uBitX in December. Browsing early uBitX threads, some builders had little or no difficulty with HF Signals wiring information, but as time went on more and more threads identified wiring, hardware, and sketch issues. While some highly customized their uBitXs from the get go, I learned it is sometimes better to stock build to insure the radio works before moving on with mods.
The attached began as a simple wiring diagram to assist (never intended to publish) in wiring the uBitX. While my uBitX is still mostly stock, over time I did revise the diagram to include a few options (I plan to pursue as time permits) as well as beneficial corrective actions identified by other builders.?
If you or others find errors please advise and will correct if it helps new builders.
73, Bob W4RJP?
<uBITX_wireup V1.7.pdf>
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Re: BITX QSO Afternoon/Evening, Sunday, April 22, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.
Thanks for trying Dave there was QSB so occasionally I couldn¡¯t hear both of you and when the carrier came on it made it difficult. At least I know my uBITX is getting out. I was using a folded dipole cut for 20mtrs, loaded with the T1 ATU in a inverted V configuration. I still need to finish building the 40mtr version and get it up in the air.? I¡¯m located in western NC so we should be able to work each other without any problem if propagation holds up.
toggle quoted message
Show quoted text
On Apr 23, 2018, at 08:31, davesters@... wrote: Hi Skip and all,
Worked AI4OT Charles, WA4THR Vic, N4DR Marc and VE3THR Tom. All between 750 to 840 miles distant from my QTH.
I heard you one time and came back but no response.?
Am using a homemade coil loaded dipole that is resonant on both 40 and 80. Using recycled 75 ohm television grade coax.
Dave?
K0MBT
|
Re: Teensy 3.5/3.6 upgrade for uBITX
Jerry: I realize the power the Pi has and I'm familiar with compiler design and grammars, as my old software company built and marketed its own C compiler for DOS back in '80s...without yacc! Al and I have been through a pretty rigorous ?C decision process for our Jackal project, looking at Pi, Mega2560, Due, Mega Zero, and the new Protoneer board to replace the Raduino/Nano board. We settled on the Teensy 3.6. One of our goals is to encourage hacking by those who are already familiar with the ?BITX, and that suggested sicking with a processor that could run in the Arduino IDE. The Teensy 3.6 has - 180 MHz ARM Cortex-M4 with Floating Point Unit
- 1M Flash, 256K RAM, 4K EEPROM
- Microcontroller Chip (PDF link)
- USB High Speed (480 Mbit/sec) Port
- 2 CAN Bus Ports
- 32 General Purpose DMA Channels
- 22 PWM Outputs
- 4 I2C Ports
- 11 Touch Sensing Inputs
and costs a little less than the Pi. The FPU is important in many SDR's that use FFT algorithms, and the Teensy has a very good FFT library. It also has a terrific audio library that we are using in our filter elements. However, to me, the critical elements were that the 256K of SRAM removes the real bottleneck of the Arduino family and there are a host of relevant libraries for the processor. Atmel needs to get its act together and boost its processor resource base if it wants to stay competitive. (I taught an assembler course on a Z80 back in the '80s and, you're right, the 328 reminds me of it although the memory architecture's a little different.) Anyway, we experimented with Pi and other processors for over a month before we committed Jackal to the Teensy. We made the right choice for us. Al and I will be showing Jackal at the FDIM conference...I think it's pretty cool and brings a lot to the table. That's not to say that someone shouldn't give Pi a try as a Raduino replacement. It's just not for us.
Jack, W8TEE
On Monday, April 23, 2018, 12:24:48 AM EDT, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:
The ATMega328P on the Nano runs at 16 MHz, has 0.002 MBytes of RAM, is an 8 bit machine.
The RPi Zero runs at a 1000 MHz, has 512 MBytes of RAM, is a full a 32 bit machine,
runs linux if you wish.? Not only will it run the C and C++ code we have on the Arduino
(if you port the Arduino libraries), but it has its own compiler for it.
And a compiler compiler to build the compiler with for that matter (yacc).?
>? I'd consider why the Zero sells for $5.
It sells for $5 because it is of the current decade.
Whereas the ATMega382P is roughly in league with the Z80
I was working with back in the 1970's.
?
That said, the Nano is a fine choice for the basic uBitx.
Not all that much it has to do.
The RPi Nano would be good if you wish to implement standalone SDR,?
with a full waterfall display out to an HDMI monitor.
Or could be used as the Arduino IDE host when programming your Nano.
The top end Rasberry Pi 3 B+ does everything I'd want in a home computer for $35.
Jerry, KE7ER
On Sun, Apr 22, 2018 at 06:17 pm, Jack Purdum wrote:
I'd consider why the Zero sells for $5. I think the biggest issue is that the Pi is a different animal than the Arduino family. First, it does not have a home in the Arduino IDE, where most of the ?BITX work is being done. Second, it doesn't have the depth of add-ons that the Arduinos do. Those that do exist seem to be more expensive. Third, most of the work on Pi is either done in scripting languages or Python, neither of which is popular on the Arduino.
If you need more horsepower, consider the Protoneer (eBay 282786290858). It has 256K of flash, 32K of SRAM (HUGE benefit), and is clocked 3x faster than the Nano at a cost of $15. It looks very promising.
Jack, W8TEE
?
?
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Re: BITX QSO Afternoon/Evening, Sunday, April 22, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.
Hi Skip and all,
Worked AI4OT Charles, WA4THR Vic, N4DR Marc and VE3THR Tom. All between 750 to 840 miles distant from my QTH.
I heard you one time and came back but no response.?
Am using a homemade coil loaded dipole that is resonant on both 40 and 80. Using recycled 75 ohm television grade coax.
Dave?
K0MBT
|
Re: UBITX Assemly Wiki Page
#ubitx
Patrick:?? Your idea of a stock uBitX wiring page is great.? I really like Mike ZL1AXG's uBitx.net website as it keeps me up-to-date with mods/issues/summaries/etc, but a? "stock" assembly page is important for uBitX newbies.? Received my uBitX in December. Browsing early uBitX threads, some builders had little or no difficulty with HF Signals wiring information, but as time went on more and more threads identified wiring, hardware, and sketch issues. While some highly customized their uBitXs from the get go, I learned it is sometimes better to stock build to insure the radio works before moving on with mods.
The attached began as a simple wiring diagram to assist (never intended to publish) in wiring the uBitX. While my uBitX is still mostly stock, over time I did revise the diagram to include a few options (I plan to pursue as time permits) as well as beneficial corrective actions identified by other builders.?
If you or others find errors please advise and will correct if it helps new builders.
73, Bob W4RJP?
|
Re: Erratic tuning with my new uBitx
I too run Linux.? I use WeeWx for my weather station software,
which is written in Python and works very nicely under Linux Mint
17.3.? See my version at .
If you also wish to run FLDIGI, then will help you out with .? It allows you to use a menu to compile FLDIGI
programs.
Ron W7HD
On 04/23/2018 01:53 AM, Chris Clarke
wrote:
Thanks Michael.
Yes, I use Linux for everything I can. I only use XP where there
is no convenient alternative and usually pull out the internet
dongle! Had Windows 7 for a short while until it screwed up, and
at that point I decided to go with Linux (whose main issues are my
scanner and my weather station software, but really I need to sort
them out. I do use XP for Ian's uBITx Memory Manager for the time
being, not having yet had the urge to use WINE ... I guess that's
another milestone I need to reach!
Chris
--
Ron W7HD - NAQCC#7587 OMISS#9898 KX3#6966 LinuxUser#415320
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Lee
Raj vu2zap
Skip Davis
_Dave_ AD0B