Try looking at this:
Might be of some help.
Good luck,
Marco - KG5PRT?
On May 2, 2017 7:41 AM, "richard kappler" < richkappler@...> wrote: I'm certainly not at the point in my project where I'm ready to tackle anything like this yet, but as the new job has reduced Ham and Bitx40 to weekends only for the most part, my rare free time during the week is limited to reading and dreaming/thinking. As such, I've run across the QST April 2014 article on "A Tiny Python Panadapter."?
In paragraph one the author, Martin Ewing (AA6E), states that he uses SDR and DSP "to transform an I/Q (in-phase/quadrature) audio IF to a live spectrum and waterfall."
Can Bitx40 as it sits support this? Not the entire project, most of it is pretty straight forward form me as I have been using RaspberryPi for various projects since it's first release, and Python for years. It's the I/Q bit that I'm unsure about. I know I can set up a Pi and an SDR dongle to present the 40 meter band to a display and use the mouse to adjust the RX freq, but using output from the BitX40 to provide some feed?
Not sure the question makes sense the way I worded it due to my n00bness at ham and Bitx. Essentially what I'm envisioning is using either a sound card or SDR dongle and a Pi to create and display the waterfall, but instead of my mouse placing the cursor to control what RX is being used, to use the tuning pot from the Bitx?
73, Richard -- W2KAP In any given circuit, the most expensive part will always sacrifice itself to protect the fuse.
|
Re: BITX40 damaged on arrival
The two 1n4148's got replaced by a BAT54SL dual schottky diode as in the uBitx: ?? ? Since they are on the same die, the diodes are matched and should not require the balancing pot. ?
On Mon, May 1, 2017 at 11:11 pm, Dale Brooks KG7SSB wrote: Hi gang, I just received my order for the BITX40v3 and during board visual inspection I noticed the board has been modified in the balanced modulator circuit. D15 and D16 and the 100ohm balancing pot has been replaced by what looks like a dual diode package with 3 leads smd. ?
|
I'm certainly not at the point in my project where I'm ready to tackle anything like this yet, but as the new job has reduced Ham and Bitx40 to weekends only for the most part, my rare free time during the week is limited to reading and dreaming/thinking. As such, I've run across the QST April 2014 article on "A Tiny Python Panadapter."?
In paragraph one the author, Martin Ewing (AA6E), states that he uses SDR and DSP "to transform an I/Q (in-phase/quadrature) audio IF to a live spectrum and waterfall."
Can Bitx40 as it sits support this? Not the entire project, most of it is pretty straight forward form me as I have been using RaspberryPi for various projects since it's first release, and Python for years. It's the I/Q bit that I'm unsure about. I know I can set up a Pi and an SDR dongle to present the 40 meter band to a display and use the mouse to adjust the RX freq, but using output from the BitX40 to provide some feed?
Not sure the question makes sense the way I worded it due to my n00bness at ham and Bitx. Essentially what I'm envisioning is using either a sound card or SDR dongle and a Pi to create and display the waterfall, but instead of my mouse placing the cursor to control what RX is being used, to use the tuning pot from the Bitx?
73, Richard -- W2KAP In any given circuit, the most expensive part will always sacrifice itself to protect the fuse.
|
Re: BITX40 damaged on arrival
When I got mine in a while ago they both had minor damage. Bent pins. Toroids all out of place. Little TLC to fix them up but other than that they're all set.
|
Re: Was Noob in need of some assistance. Now: [BITX20] Input antenna attenuation?
Just ran the batteries as a test to see if my psu was too noisy it made no difference :-(
Has Anybody out there post a video showing what the waveforms are supposed to look like are various points in the signal path??
|
Re: BITX40 damaged on arrival
I also had L1 brake loose in the same fashion but luckily it
hadn't broken it's wires yet, a little epoxy fixed the issue but
it was a packing issue also.
On 05/01/2017 11:50 PM, bands11 wrote:
toggle quoted message
Show quoted text
Hi folks ¡ I received my BITX40 today (my 3rd) and found that L1
had been torn loose from the board. ?It was rattling around in the
plastic box. ?After examining the way the board, Raduino, and
connecting wires had been packed in the box, it seemed to me that
the Raduino had been forced into the plastic container. ?It was
right over L1, L2, and L3. ?It¡¯s not a stretch to believe that in
packing the Raduino, it had been forced into the box in such a way
as to tear L1 loose from the board. ?This is NOT an assembly,
testing, or shipping problem! ?It appears that it is a packing
problem. ?Who knew??
I suggest that Farhan caution his packers to go a
little lighter on the "forcing things to fit¡± part of packing.
I have attempted a repair ¡ it is ugly ¡ but if it
works I¡¯m fine with it (the leads left on L1 were pretty short).
All in all, I¡¯m a satisfied customer. ?By the way,
it was a 10-11 day ship time. ? :-)
Bob Harbrecht
KE7QEQ
I will stop at nothing to reach my objective,
but only because my brakes are defective.? ?Ashley
Brilliant
|
Re: raduino_v1.09 with RIT (SPLIT) functionality
Hi Adi,
When you set the tuning range via the menu it is saved to EEPROM and
retrieved during power up.
73, Allard PE1NWL
toggle quoted message
Show quoted text
On Tue, May 2, 2017 11:28, electronic design via Groups.Io wrote: Hi Allard,
Is it possible to save the range (from the menu) when power off?
Thanks!
73! AdiYO2LIW
On Monday, May 1, 2017 11:52 AM, Allard PE1NWL <pe1nwl@...>
wrote:
Sorry, there was an extra dot "." at the end of the URL.
Please try again without the dot:
73, Allard PE1NWL
On Mon, May 1, 2017 10:28, bengt-ingvar.andersson@... wrote:
Thanks again Allard for fine program !
I could not find the sketch on the address ? (Error 404)
Ingvar
|
Re: Multiband bitX40 questions
I have a sketch that does everything you are looking to do. It is a modification of Gene Marcus¡¯ QEX article. If you are comfortable adding some wires and components it works great. In addition it uses a GPS engine to control the Si5351 and a multiplexer chip and transistors to drive the relays. The GPS engine ($6.99) holds the frequency to .01 HZ and requires no other calibration. Any of the options may be disabled in the code. As setup you can enable either Pot or Rotary tuning. The step may be by pot or push button. Band VFO and BFO frequencies are set in a tuning table and selected by pushbutton. I have tried to put together a sketch that is a Chinese menu, select the option and the way you want to control it. I need to add some of the changes floating around that keeps the pot control from bouncing between digits. See ? which is where I unabashedly stole most of the ideas from Genes nifty work. The display, in addition to displaying frequency displays step size, Maidenhead grid, GPS time etc. I have been playing with a 20 X 4 display and for lack of good sense display Satellites in use and elevation. If that sounds like something you¡¯re looking for, drop me an email at w4jle@.... ? v/r Fred W4JLE ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of vk3xl via Groups.Io
Sent: Monday, May 1, 2017 9:14 PM
To: [email protected]
Subject: [BITX20] Multiband bitX40 questions ? Hi all, I have 2 BitX40s one on 40 meters and the other on 80 meters.Both are working ok, but I have plans to convert one of them to multi band operation. The hardware modification of the BitX40 board is already well documented on various sites, so that should not be too much of an issue.? There are a number of issues I need to resolve mainly to do with the raduino programming. Firstly I am a complete novice at arduino programming, but I can upload a sketch to the raduino ok. so to my questions 1. How easy / difficult would it be to put some lines of code into an existing sketch to facilitate band changes? What hardware modifications would be required? say a momentary contact button like the function button used with the latest sketches (v1.09 etc). Say at the end of the tuning pot range instead of stepping 50 Khz up or down, when the button is pressed the rig steps up or down to preset bands ie 160, 80, 40, 20 etc. 2. Would it be possible for the sketch to automatically change sideband to USB for frequencies above 10Mhz? 3. Would it be possible to have a logic output that would could be used to drive relays to switch in and out various band pass filters used for the other than 40 meter band? ? Thanks in advance.
--
Mike VK3XL
|
Re: Simple audio muting circuit
I must add I do have farhan's AGC inline as well and may be causing undesired affects
On Tue, May 2, 2017 at 6:16 AM, Steve Greer <km4ous@...> wrote: I was unable to make this work not sure what I did wrong only thing different was the PNP transistor.? Maybe if someone has some pictures of what they did that would help me see what I did wrong.? I only get a reduced audio level and by having my lm386's gain cap removed it's too low.? So I will look over this circuit again, it's working for others so it must be something I did.
|
Re: Simple audio muting circuit
I was unable to make this work not sure what I did wrong only thing different was the PNP transistor.? Maybe if someone has some pictures of what they did that would help me see what I did wrong.? I only get a reduced audio level and by having my lm386's gain cap removed it's too low.? So I will look over this circuit again, it's working for others so it must be something I did.
On Mon, May 1, 2017 at 11:49 PM, Jeff <jeff@...> wrote: I built this up today and it made a world of difference. I used a 470K and installed R4 in case I want to add the side tone later. Thanks! Jeff N9ARZ
|
Re: raduino_v1.09 with RIT (SPLIT) functionality
Hi Allard,
Is it possible to save the range (from the menu) when power off?
Thanks!
73! Adi YO2LIW
On Monday, May 1, 2017 11:52 AM, Allard PE1NWL <pe1nwl@...> wrote:
Sorry, there was an extra dot "." at the end of the URL.
Please try again without the dot:
73, Allard PE1NWL
On Mon, May 1, 2017 10:28, bengt-ingvar.andersson@... wrote: > Thanks again Allard for fine program ! > > I could not find the sketch on the address ? (Error 404) > > Ingvar >
|
Re: Was Noob in need of some assistance. Now: [BITX20] Input antenna attenuation?
On 02/05/17 00:26, stronggeek30s@... wrote:
[....] 4 18650's 4.1v li-ion batteries. Then a nice 7812 regulator.
Tried that 3 weeks ago.
I did this too. That 12V regulator runs quite hot and wastes a lot of battery. I'll try find a switching regulator out of an old ADSL router or some other junk.. Another way to do it, is run the mainboard on 3 cells, and switch the voltage UP for the PA. Interestingly, this would give us a power-out setting in software. S
|
|
|
I use a 3A diode and a fuse
On 2 May 2017 5:05 pm, "Fernando Garcia" < ferjanyen@...> wrote: Hi everyone, my bitx40 got sorted after plugging the 12 V supply the wrong way round. The damage was melting of the track front 12 supply to D7, rewired and new D7, a new 4148. The IRF510 and 2N2219 also got replaced (both blown) did not need to adjust R136 as correct on tx is as expected. I was lucky because my distraction did not burn any of the voltage regulators or the receiver part of the bitx. Tha?os again for your help. 73 ?de GOVUF.
|
Hi everyone, my bitx40 got sorted after plugging the 12 V supply the wrong way round. The damage was melting of the track front 12 supply to D7, rewired and new D7, a new 4148. The IRF510 and 2N2219 also got replaced (both blown) did not need to adjust R136 as correct on tx is as expected. I was lucky because my distraction did not burn any of the voltage regulators or the receiver part of the bitx. Tha?os again for your help. 73 ?de GOVUF.
|
Re: BITX40 damaged on arrival
Hi gang, I just received my order for the BITX40v3 and during board visual inspection I noticed the board has been modified in the balanced modulator circuit. D15 and D16 and the 100ohm balancing pot has been replaced by what looks like a dual diode package with 3 leads smd. My reason for buying this board was to analyze the balanced modulator circuit to see how they were able to accomplish such good carrier suppression levels. I have tried building several circuits only to obtain about 24db of suppression and the BITX40 claims 50db or better. I need to find out what the replacement part is that has replaced D15 and D16. I cannot find the numbers that appear on the device to match up on data sheets. Can someone help me out on this? Thanks for reading
|
Re: what to read before EMRFD? (WAS: Re: Farhan to attend FDIM)
Hi Bill, EMRFD is the maximum collection of tech info for the homebuilders today and for some years to come. Something you may read is the clssic ARRL Handbook or, something different but easy to read, the RSGB Radio Communication Handbook. I do not know if ARRL has it for sale, there is a CD edition available for low cost shipping. ?Best 73 Gian, I7SWX
|
Re: BITX40 damaged on arrival
All three of my toroids were glued down also ¡ must have been quite a ¡°forceful¡± packing to break L1 free!
Bob KE7QEQ On May 1, 2017, at 9:50 PM, bands11 < bands11@...> wrote:
Hi folks ¡ I received my BITX40 today (my 3rd) and found that L1 had been torn loose from the board. ?It was rattling around in the plastic box. ?After examining the way the board, Raduino, and connecting wires had been packed in the box, it seemed to me that the Raduino had been forced into the plastic container. ?It was right over L1, L2, and L3. ?It¡¯s not a stretch to believe that in packing the Raduino, it had been forced into the box in such a way as to tear L1 loose from the board. ?This is NOT an assembly, testing, or shipping problem! ?It appears that it is a packing problem. ?Who knew??
I wouldn't have most of my problems ... if I didn't have most of my friends!? ? ?Ashley Brilliant
|
BITX40 DDS has arrived...
Gidday, Ordered DDS 29/04 arrived via DHL 02/05 in Sydney, Australia - thank you. ?This will go into my VFO BITX40. Two questions 1. which components do I remove when I connect the DDS output to the main board? 2. which wire do I ground when I calibrate the DDS? At this time I just want to use 40m LSB and 12VDC to the PA. ?When it is up and running properly I can start playing around with mods and cons etc. Regards and TNX - Noel VK2CAO
|
Re: Multiband bitX40 questions
Thanks Jack, it looks like I will have to get serious about learning programming arduino.?
--
Mike VK3XL
|
Allard PE1NWL
Giancarlo - I7SWX