Keyboard Shortcuts
ctrl + shift + ? :
Show all keyboard shortcuts
ctrl + g :
Navigate to a group
ctrl + shift + f :
Find
ctrl + / :
Quick actions
esc to dismiss
Likes
- BITX20
- Messages
Search
|
Re: Need some explanation on v4 sketch
Barry, Which sketch?are you talking about? There are several now! As the ubitx is a double conversion superhet, the first mixer is driven by one clock of the si5351 that is 45 mhz above. For?example, to operate 45 mhz, the vfo clock is set to 52 mhz. The second conversion has to bring the 45 mhz of down to 11.059 mhz. Mixing 45 mhz signal with 53.059 mhz inverts the sideband, mixing with 39.941 Mhz keeps the sideband the same way while bringing down the frequency. The third clock output drives the BFO that is slightly below 11.059 mhz. You can see this in the function set_frequency at? On Sun, Jul 10, 2022, 3:17 AM barry halterman <kthreebo@...> wrote: I am trying to understand how the sketch for a ubitxV4 arrives at the frequencies it does. My question is Where does the vfo frequency, and first mixer get defined? Where in the sketch does those values get calculated and sent to si5351? I have gone over and over Jerry's si5351 routine but I just can't figure it out. |
|
Need some explanation on v4 sketch
I am trying to understand how the sketch for a ubitxV4 arrives at the frequencies it does. My question is Where does the vfo frequency, and first mixer get defined? Where in the sketch does those values get calculated and sent to si5351? I have gone over and over Jerry's si5351 routine but I just can't figure it out.
I have been trying to figure this out but I need some help. I know where the BFO is defined. The first mixer oscillator and vfo seem very cryptic to me....like magic!! I am trying to come up with a sketch that runs a vfo between 3.0 to 3.5 mhz. The bfo is either 4.001 or 3.99 mhz, plus or minus. Output at 7.0 mhz. Ideally I would love to have one of the clocks generate the 7.0 mhz signal during transmit. Ideas, please? Thanks in advance. K3Bo |
|
Re: No rf output
Ishwarrao,
I do not have direct experience with that version, though it is very similar to the 2 v4 that I have.? The bias setting instructions in the prior post would be correct.? You may want to do several mods after you get the transmitter working.? The first would be spectral purity as per this page: I have done this to both of my v4 boards, which fixed the issues when tested with my TinySA. The other issue is the "pop" fix that is just for the v3 board: Since I do not have a v3 board, I can not comment on which one is best. AGC is another mod that you may want.? I have used both the AmateurRadioKits.in and the Kits-Projects.com kits.? There are others, and I am not totally happy with the two I have tried.? Of the two, Kits-Projects.com is the one I like most. The last suggestion is software.? AFTER you have the rig working, you can start adding features through software.? For the versions before v6, I like the KD8CEC software. This will take understanding the Arduino IDE, or you can download the hex file and use Xloader to install it on the uBitx Nano.? It does open up more options like a graphic display and an S meter. Have fun! 73 Evan AC9TU |
|
Re: No rf output
Ishwarrao Sutrave
Version 3 Ishwarrao K S On Sat, 9 Jul 2022, 8:51 pm Evan Hand, <elhandjr@...> wrote: Ishwarrao, |
|
Re: No rf output
Ishwarrao,
Which version of the uBitx do you have (I assume it is one from HFSignals)? Here is a link to the HFSignals webpage that helps with setting the bias as Ashhar Farhan is suggesting: This is also a good test to see if the IRF510s have been damaged. NOTE:? it is easy to damage the IRF510s if you set the bias too high.? The controls work opposite from most in that you turn it clockwise for the minimum bias and gradually turn anticlockwise as you adjust for the correct current draw increase. 73 Evan AC9TU |
|
Re: No rf output
Have tried setting the pa bias? On Sat, Jul 9, 2022, 8:34 PM Ishwarrao Sutrave <ishwarraosutrave@...> wrote:
|
|
Re: No rf output
Ishwarrao Sutrave
1] When PTT pressed Tx showes 2] current .19 amps showes when ptt pressed 3] CW keying heard side tone 4] But no output Ishwarrao K S On Sat, 9 Jul 2022, 4:32 pm Ashhar Farhan, <farhanbox@...> wrote:
|
|
Re: No rf output
Can you give some more details like: 1. What happens when you press the ptt. Does it go to tx or not? 2. Doea CW work? 3. On transmit, can you hear the relays click? 4. What is the current draw on key down? On Sat, Jul 9, 2022, 3:58 AM Ishwarrao Sutrave <ishwarraosutrave@...> wrote:
|
|
Re: Here's the operating manual
Ah yes. I, too, got very good at tuning analog radios and getting very close. I had a Drake B line, which had the 25 KC calibrator, but it also had each dial revolution at 25 KC. Someone had further marked the dial skirt with puff paint or glue or some such every 5 KC. Between those things, I really could get within just a couple KC of whatever freq I wanted. Later, when I had a rig that had fewer tactile markings, I could still get very close.
toggle quoted message
Show quoted text
Anyway, when this becomes available and I actually have expendable capital, I will definitely be grabbing one to play around with :) -- Buddy Brannan, KB5ELV - Erie, PA Email: buddy@... Mobile: (814) 431-0962 On Jul 8, 2022, at 9:28 PM, Ashhar Farhan <farhanbox@...> wrote: |
|
Re: uBitx V6, no reception.
#v6
#ubitx6-help
Ashok,
The way you have described it, The v6 uBitx should be frequency calibrated, and the BFO set for the proper range.? I would say it is good enough. Good Job! 73 Evan AC9TU |
|
Re: Here's the operating manual
I can attempt mixing the rx audio and the tts output. Last year, somehow ocra got enabled and there was no way to turn if off! I would prefer a screed reader that is under sbitx control to set the level of chatter. Long gone now, but as a kid, I would go to sleep listening to the band with lights switched off. The night stand radio was a HW8 loaned by Anil, SM0MFC. The working was simple and the band was covered in exactly six turns of the tuning knob. I could home into a frequecy within 5 khz by touch. There was ghastly frequency calibrator that he had added by drilling holes into the front panel. It screamed every 25 khz.? Anyway, very few stations knew their own frequencies back then. Some were so drifty that during a morning qso, we'd ragchew across the band, stomping over two cw nets. Once I heard Abeezar on 20 and gave a call to him, he didnt reply back. So I called him on the landline, he said he was on 40! Figure that out! - f On Sat, Jul 9, 2022, 5:26 AM Buddy Brannan <buddy@...> wrote: There is Orca for GNOME, and Speakup (a set of kernel modules) for the command line console. I gather that the SBitX apps use GNOME somekindahow. Anyway, I think this could be done, even if speech on demand interrupts the receiver briefly, or if speech is instead sent to an additional sound card. |
|
Re: Here's the operating manual
There is Orca for GNOME, and Speakup (a set of kernel modules) for the command line console. I gather that the SBitX apps use GNOME somekindahow. Anyway, I think this could be done, even if speech on demand interrupts the receiver briefly, or if speech is instead sent to an additional sound card.
toggle quoted message
Show quoted text
-- Buddy Brannan, KB5ELV - Erie, PA Email: buddy@... Mobile: (814) 431-0962 On Jul 8, 2022, at 4:02 PM, David Barber <wd8ajq@...> wrote: |
|
External USB connection for programming the Raduino
Hi,
I was wondering if someone has carried out a hack to include a USB port externally on uBITX so as to allow programming or access to the Raduino without having to open the case? Explanation: Once the uBitx + the Raduino is in the case, and code changes need to be made or maybe if I could use RigPi to control the uBITx then I would need to have the USB externally to allow for control of the rig? Has this been done? or cannot/should not be done? Many thanks Best 73 DE M0RVI/Ravi -- I'm here to add more value to the world than I'm using up. |
|
Re: Here's the operating manual
Buddy:
toggle quoted message
Show quoted text
I have also started reading the Sbitx manual. I personally like the rig having a keyboard interface. After reading your below message it got me wondering. If there is a screen reader to speech output on the Pi platform, making the Sbitx accessible for the Blind might be easy to do. I have very little knowledge about the Pi platform. Most of my screen accessibility usage is underMicrosoft and Apple. Dave WD8AJQ Sent from my iPhoneSE On Jul 7, 2022, at 2:11 PM, Buddy Brannan <buddy@...> wrote: |
|
Re: Sbitx manual
This card can be used instead of the Audio Codec Board-PROTO. The card mounts directly on the pi. A stacking connector should be used instead of the standard connector so you can access the gpio's on the pi. The board uses the same pins as the Audio Codec Board and it uses the same linux driver.
vy 73 de oz9ny, Niels |
|
Re: Sbitx manual
Doug, I had bought 5 of them at the start of the project from mouser. There is some equivalent board from waveshare too I guess. The kit uses a custom board. - f On Fri, Jul 8, 2022, 8:09 PM Doug W <dougwilner@...> wrote: On Tue, Jul 5, 2022 at 07:46 PM, Ashhar Farhan wrote: |
to navigate to use esc to dismiss