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Re: SBITX RFON Transmitted signal #sBitx

 

I have a problem that is similar and may be the same. Will be digging into this more later.

Got an audio report that said it sounded distorted. The mic is the one that came in the uBitx v3 kit.

Will try to get an audio recording to compare.?
Re: Shipping

Anthony Good
 

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I¡¯d call DHL¡¯s customer support line and see if your address is recognized as a valid address.

On Sep 24, 2022, at 21:23, Jim Burns <outbackerwb4ilp@...> wrote:

I'm planning to order a Bitx kit but I'm not sure DHL delivers to my rural address in KY.? Sometimes UPS and FedEx have problems locating me.? USPS does a great job.? Does anyone have experience with DHL and rural deliveries?? UPS hands shipments over to USPS for deliveries to my P.O. Box; does DHL do this?
Thanks for your comments !
Jim WB4ILP?

Shipping

 

I'm planning to order a Bitx kit but I'm not sure DHL delivers to my rural address in KY.? Sometimes UPS and FedEx have problems locating me.? USPS does a great job.? Does anyone have experience with DHL and rural deliveries?? UPS hands shipments over to USPS for deliveries to my P.O. Box; does DHL do this?
Thanks for your comments !
Jim WB4ILP?
Re: day light again `inquiry

 

Ashhar, I was mistaken when I said the spur moves in the same direction as the main signal. It is just the opposite. If I tune up in frequency, the main signal goes up in pitch/tone. The spur will go down in pitch/tone.
this weekend is a RTTY contest and all I hear is RTTY signals in the entire lower portion of the 40-meter band. Annoying.
Re: #sBitx Idea for sBitx surround sound cw #sBitx

 

Brad,
The rx audio output from the codec is mono. The other channel is used for transmit circuitry. This rules out stereo output for the rx.
The binaureal sound is not possible from the architecture in software alone.
- f

On Sun, Sep 25, 2022, 2:53 AM n8yg via <n8yg=[email protected]> wrote:
A friend of me developed a circuit board for surround sound cw.? It's pretty neat and as you tune past a station the cw goes from one ear to the other.? It gives another dimension to the perception of cw signals like I have not heard before.?
?With that in mind I was thinking that it would be fun if that could be implemented on the Sbitx. Looking at the schematic it looks like one channel of the codec is used for TX and one for RX.. so Mono only for the headphones. So a question for Farhan, if there is a redesign for the board would it be worth adding a switch so both channels can come out to the headphone during rx? Not that I have a clue as to how complicated the software would be to implement the filters necessary..... but just asking.??

73
Brad N8YG

#ubitx Without Tx and without RX #ubitx

 

Good night people.? I have a ubtix V3 and I was using it in cw and I observed it with bad contact, turning on and off and then it turned off, I checked the 7805 regulator and it was very hot, I changed the regulator removing it from the board and put it on the radio plate adding a resistor after that I turned on the radio and without TX and without RX, I immediately thought of the SI 5351, I used my frequency meter and clock 2 is absent, the other clocks ok, people help colleagues to get my ubtix back.? thanks PY1LHL - LEO
SBitx T/R relay

 

With??in the circuit.

Would it be acceptable to apply 12v? to Pin 6 and Ground to Pin 2 to see if i can get the relay to switch...having issues with Pi doing what it needs to do to switch using FT8 to transmit, but No power out..
When Pi releases xmit, the receive is back in business.? just no XMIT..(maybe barking up wrong tree...but first place to start.
Vince

#sBitx Idea for sBitx surround sound cw #sBitx

 

A friend of me developed a circuit board for surround sound cw.? It's pretty neat and as you tune past a station the cw goes from one ear to the other.? It gives another dimension to the perception of cw signals like I have not heard before.?
?With that in mind I was thinking that it would be fun if that could be implemented on the Sbitx. Looking at the schematic it looks like one channel of the codec is used for TX and one for RX.. so Mono only for the headphones. So a question for Farhan, if there is a redesign for the board would it be worth adding a switch so both channels can come out to the headphone during rx? Not that I have a clue as to how complicated the software would be to implement the filters necessary..... but just asking.??

73
Brad N8YG
Re: sBITX USB ro HDMI #sBitx

 

One of these plugs into the first (leftward, towards the board edge) micro-HDMI socket and converts to the large HDMI plug. The other has a HDMI socket that mounts to the chassis.
Transverter Location #ubitx #2meters

 

I'm setting up a 2 Meter transverter to my uBITX. My normal setup is:
1) uBITX
2)Nm0S 4-S Tuner
3) Antenna
My question is should the 2 Meter transverter go before or after the tuner??
The transverter has the coax going from radio to transverter then from transverter it has the HF Antenna BNC and VHF BNC.?
I have never used a transverter before and I don't know the proper location for it.?
--
'72
Aaron K5ATG
Re: File /uBITX_6_N8ME_2_VU3GAO_Mods.zip uploaded #file-notice

 

Jack
I installed it (V6) using a new Nano and the first time had to choose Uno instead of Nano as the board (using Arduino IDE) and the "new" rather than "old" boot loader. ?When trying to upload as Nano, I got the sketch-too-big message but it was OK with the Uno setting. ?

Also, following Nitin's suggestion, I had to installed Ashar's original firmware first, then the N8ME/VU3GAO firmware, in order to clear the settings memory. Otherwise, when the original N8ME firmware had been on previously, I was getting gibberish over top the settings display. Since I was using a new Nano, while I had Ashar's original firmware on, I calibrated the touch screen because I could access the calibration by pushing the encoder. ?When I tried to install the new firmware without doing that, the display was frozen.

73 Howard K4LXY
Ubitx V6 - WSJTX - Should my LCD screen on Ubitx be changing when I make changes of frequency and such on WSJT-X? #cat

[email protected]
 

Got?n8me_2_vu3gao_mods loaded and green CAT , the Test PTT turns red. But I don't see that as TX on the Ubitx, or anything on the Ubitx change. Any ideas or settings?
removing self from bitx20 forum

 

Just wanted to say goodbye to everyone,and enjoy ur sbitxes,and such. Im changing paths in my Amateur radio career.
Just going to buy USA made or make it myself.

Not to be insulting to others, and none intended, i was shocked when 3 USA kit dealers emailed me back when i asked to purchase some of their boards and kits.

:summary of cut and paste of all three mom and pop shops. wont name the shops,dont need to.
""However, given the low cost competition from outside the US, it is difficult for us to justify the expense of a large batch.
?
Here is one example:
?
We simply can not compete with this pricing and with recent supply chain issues and inflation, our costs have only increased.""

Meaning others have faster access to the chinese markets than USA markets.

So in order to be fair and support the small mom and pop shops, i wont be buying any radio kits anymore produced or designed outside the USA. Granted it limits my access to some kits, but I have a deep nawing feeling im doing myself right. Some may flame me but ohh well. to each his own.

Wish everyone good luck on the sbitx and the ubitxs too. I still own 3 ubitxs. but wont be purchasing more in the future. No offense to you Ashhar,you are a brilliant designer and buisness Man. A credit to the hobby.

good luck on all ur builds in the future and may you all keep the smoke in the pcb after building it . HI HI.

73
David
ac9xh
Re: #sbitx #sbitx-k3ng #sBitx #sbitx-k3ng

Anthony Good
 

Hi Rolf,

You can do the \help and \h2 commands to see a list of commands. The commands I have added are on help page 2 (\h2).

I just did a push to git a few minutes ago updating the help screens, so if you did a git pull before, refresh your sbitx-k3ng code with another git pull¡­

73
Goody
K3NG

On Sep 24, 2022, at 12:12, Rolf Schroeder <rolf@...> wrote:

Hi Goody,
is there a list of commands that are available? I like to update my sBitx version and try the new one.
Thanks a lot for your effort
Vy73 de
Rolf, DL8BAG

Am 24.09.2022 um 16:48 schrieb Anthony Good <anthony.good@...>:

?In my development version I have updated the following:

1) There are now \reboot and \shutdown commands. For those who may be using the software in a multi-user system in the future, there is a #define INCLUDE_REBOOT_AND_SHUTDOWN_COMMANDS that can be commented out to disable these commands from being available to the user. The two commands shutdown the transmitter and recording (if on), and save user settings prior to the shutdown or reboot. I may add some code later to also signal the Fldigi process to shutdown.

2) The \fc frequency calibration command now invokes a DDS retune so you can see the effects of the calibration immediately, without having to do an \f command after an \fc command as before.

I believe there are still issues with the \addcwpitch setting. I hope to look at this more in depth this weekend.

To pull my latest code and try it:

cd /home/pi
git clone
cd sbitx-k3ng
git pull
git checkout 2022.09.15
./build sbitx
./sbitx


This is development code and may or may not work for you. Your mileage may vary. Void where prohibited.

73
Goody
K3NG
Re: day light again `inquiry

 

Temperature compensation is only part of the game.
The other was using a coil form with stable temperature characteristics
like ceramic.? Most ferrites and powered iron cores were to be shunned
or temperature stable mixes preferred,

Then the oscillator, many transistor designs were able to maintain 1hz
stability at fixed temperature.. Sieler and Vacker were especially good.
Reason is that the device be it JFET, MosFET, Bipolar all exhibit
parameter shift with temperature The more decoupled from the LC
the active device is the less it can alter the tuned circuit.

So to get a stable VFO you had to start with stable parts like COG or
better polystyrene.? Stable coils (Not toroids -7material is +30PPM)?
where some plastics are all over the maps for stability.? I'd note that
while varicap diodes are popular they are very temperature unstable
as well.

However with all that and good mechanical and thermal design its
possible to build very stable VFOs with modern parts and no
N750 caps.


Allison
------------------
Please use the forum, offline and private will go to bit bucket.
Re: #sbitx #sbitx-k3ng #sBitx #sbitx-k3ng

 

Hi Goody,
is there a list of commands that are available? I like to update my sBitx version and try the new one.
Thanks a lot for your effort
Vy73 de
Rolf, DL8BAG

Am 24.09.2022 um 16:48 schrieb Anthony Good <anthony.good@...>:

?In my development version I have updated the following:

1) There are now \reboot and \shutdown commands. For those who may be using the software in a multi-user system in the future, there is a #define INCLUDE_REBOOT_AND_SHUTDOWN_COMMANDS that can be commented out to disable these commands from being available to the user. The two commands shutdown the transmitter and recording (if on), and save user settings prior to the shutdown or reboot. I may add some code later to also signal the Fldigi process to shutdown.

2) The \fc frequency calibration command now invokes a DDS retune so you can see the effects of the calibration immediately, without having to do an \f command after an \fc command as before.

I believe there are still issues with the \addcwpitch setting. I hope to look at this more in depth this weekend.

To pull my latest code and try it:

cd /home/pi
git clone
cd sbitx-k3ng
git pull
git checkout 2022.09.15
./build sbitx
./sbitx


This is development code and may or may not work for you. Your mileage may vary. Void where prohibited.

73
Goody
K3NG
Re: Calibration & filters #calibration #filters

 

I specify, I am currently working with a 12mhz SSB filter
Re: Calibration & filters #calibration #filters

 

Hello,
a little code reading before my question on value of frequencies

Code UBITX V4.3
The uBITX is an upconnversion transceiver. The first IF is at 45 MHz.
? ?The first IF frequency is not exactly at 45 Mhz but about 5 khz lower,
? ?this shift is due to the loading on the 45 Mhz crystal filter by the matching
? ?L-network used on it's either sides.
? ?The first oscillator works between 48 Mhz and 75 MHz. The signal is subtracted
? ?from the first oscillator to arriive at 45 Mhz IF. Thus, it is inverted : LSB becomes USB
? ?and USB becomes LSB.
? ?The second IF of 12 Mhz has a ladder crystal filter. If a second oscillator is used at
? ?57 Mhz, the signal is subtracted FROM the oscillator, inverting a second time, and arrives
? ?at the 12 Mhz ladder filter thus doouble inversion, keeps the sidebands as they originally were.
? ?If the second oscillator is at 33 Mhz, the oscilaltor is subtracated from the signal,
? ?thus keeping the signal's sidebands inverted. The USB will become LSB.
? ?We use this technique to switch sidebands. This is to avoid placing the lsbCarrier close to
? ?12 MHz where its fifth harmonic beats with the arduino's 16 Mhz oscillator's fourth harmonic
*/
// the second oscillator should ideally be at 57 MHz, however, the crystal filter's center frequency
// is shifted down a little due to the loading from the impedance matching L-networks on either sides
#define SECOND_OSC_USB (56995000l)
#define SECOND_OSC_LSB (32995000l)
?
?
//these are the two default USB and LSB frequencies. The best frequencies depend upon your individual taste and filter shape
#define INIT_USB_FREQ? ?(11998370l)
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Code KD8CEC
.....
?#define SECOND_OSC_USB (57003400l)
? #define SECOND_OSC_LSB (33010400l)?
? //these are the two default USB and LSB frequencies. The best frequencies depend upon your individual taste and filter shape
? //Not used, Just comment (Default)
? #define INIT_USB_FREQ? ?(11996500l)
....

MY TESTS:
I made a model to test my 45MHZ filter with a nanovna (So i change the value of inductance and capacitors for maching (1.5 ?h and 8pf) on my homebrew assembly))
this gives:
Central frequency: 45.004280 MHZ
Low frequency at -3DB: 44.997900 MHZ approximately
High frequency at -3DB: 45.010480 MHZ approximately

My question:
function of the values (which are different) in the code v4.3 of the Ubitx and KD8CEC? and my filter frequencies description , what would be the 3 best values for USB freq, OSC USB and OSC LSB knowing that a priori they take into account matching ?
I would like to amend the code to that effect

cdt
Re: sBITX USB ro HDMI #sBitx

 

Did you install a micro HDMI socket on the back of the case? I was having trouble finding one.
#sbitx #sbitx-k3ng #sBitx #sbitx-k3ng

Anthony Good
 

In my development version I have updated the following:

1) There are now \reboot and \shutdown commands. For those who may be using the software in a multi-user system in the future, there is a #define INCLUDE_REBOOT_AND_SHUTDOWN_COMMANDS that can be commented out to disable these commands from being available to the user. The two commands shutdown the transmitter and recording (if on), and save user settings prior to the shutdown or reboot. I may add some code later to also signal the Fldigi process to shutdown.

2) The \fc frequency calibration command now invokes a DDS retune so you can see the effects of the calibration immediately, without having to do an \f command after an \fc command as before.

I believe there are still issues with the \addcwpitch setting. I hope to look at this more in depth this weekend.

To pull my latest code and try it:

cd /home/pi
git clone
cd sbitx-k3ng
git pull
git checkout 2022.09.15
./build sbitx
./sbitx


This is development code and may or may not work for you. Your mileage may vary. Void where prohibited.

73
Goody
K3NG
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