Date   
Re: #ubitx-help #ubitx-help

hakan.sjostrom@...
 

I have got help for my RX problems. But nothing of what I could though about. In my home I hear a lot of signals with my little transistor radio but nearly nothing with the ubitx. At my friends house suddenly there was a lot of signals with the rig (and a dipole antenna). I also tested the LW at another place outdoors - no problems. So it seems the problem is in the enviroment of my apartment (combination with the indoor antenna?)
Anyway it looks a lot better now. And many thanks to you who tried to help me with my problem!
Håkan

Re: Latest Build, Mods and results.

Mike
 

Hi @Mharpen do you have a shematic of the audio amp circuit you used to compensate for the gain loss of the AGC circuit?

Swapping First and Second Line on uBITX Display with KD8CEC v1.08 firmware #ubitx

 

I just got my uBITX V3 wired up yesterday and decided to go ahead and load the latest available KD8CEC firmware this morning.

After playing around with it for a while I decided that I would prefer to have the Main VFO frequency and Mode displayed in the top
line of the display and the secondary info (VFO B etc) on the bottom line so I looked at the code and realized that there seemed to be a swap
happening between lines one and two under some circumstances. This quest ultimately lead me to the uBITX Memory Manager. 

Under 'User Interface' of the uBitx Memory Manager application (scroll way down), checking  the '1/2 Line Toggle' works to swap the first and 2nd lines
on the display, so I didn't have to change any code to achieve this. 

I did a search within this group and found reference to this feature in message #46400 but it was pretty low key so I thought that I would
reiterate this in case anyone was else has a preference for putting the more important info on the top line of the display.

Cheers

Michael VE3WMB 

Re: New RF AGC modification #ubitx

Mike
 

Hi. Is there an error in the wiring instructions of the coaxes here? -> http://www.nd6t.com/uBITX/Graphics/potmnt2.jpg

Shouldn't it be to K3 pin 3 and not pin 14?

(In the schematic on hfsignals.com pin 14 look like is ground?) http://www.hfsignals.com/wp-content/uploads/2017/12/ubitxr4.pdf

73

Re: How hot is too hot? #ubitx

Bo Barry <wn4ghv@...>
 

Yep, i got the 5A LM2596 version on eBay $8.00

Re: uBitx has a bit too crispy / semi-distorted audio even on low signal levels #ubitx #ubitx-help

Mike
 

Hi I actually have two uBITx radios. One that I have tuned the BFO on and another factory stock. I did swap in the other uBITx into the same cable harness: the "crispy / semidistorted" audio is exactly the same on both of them. Its kind of "cracking up" on the peaks. If i listen to a carrier, I hear the same effect. The tone is not clean.

Re: New RF AGC modification #ubitx

Don, ND6T
 

Well, looky there! Mike, I hadn't noticed  but it looks like Farhan moved the wiring from version 3 (the one that I have) to the other set of relay contacts on version 4 (the one that I am waiting for)! Good catch! As soon as I get my new boards I'll check that out and update the web site. I can hardly wait to see what else has changed. Just might have some more work to do. Hold off a bit, if you could. As soon as I get my new  board I will get right to it. Thank you.

Re: uBitx has a bit too crispy / semi-distorted audio even on low signal levels #ubitx #ubitx-help

Mike
 

Here is an example of how it sounds like. SSB signals kind of sounds like someone runs a strong RF clipper on them. If you wait until the last part of the clip you can also hear CW signals. Those signals are not too strong and should not distort.

https://groups.io/g/BITX20/files/180615_1218.MP3

Re: uBitx has a bit too crispy / semi-distorted audio even on low signal levels #ubitx #ubitx-help

Mike
 

Re: My first ubitx #ubitx

Willy
 

It looks like you were sitting on my deck. Every detail. 73 Willy W1LY

On Thu, Jun 14, 2018 at 10:05 AM, Bill Watkins <kf7yxs@...> wrote:

Got my ubitx last week. Made my first contact yesterday with it, and I’m very pleased. 20 meters usb. Used qrp guys un-un plus wire antenna. Chicago to South Carolina.   Glad to be a part of the group. 


Re: Latest Build, Mods and results.

Mharpen@...
 

Hello Mike. The amp is a verbatim copy of the Q70 amp including the blocking caps and C52 and R52. It is installed between VOL-H and R70 with a 10k trim pot on the input to adjust the drive. Thanks for your interest. Mike N6CMY

Re: New RF AGC modification #ubitx

RCBoatGuy
 

Relay K3 has different pin assignments in the r4 schematic compared to prior versions. 

The AGC mod was created before the r4 schematic was released. 

73,

Carl, K0MWC

Re: SI5351 quadrature VFO

freefuel@...
 

Jerry, that Si5338 while it has four outputs it only has a single PLL, it would seem that only a single PLL to work with would compound the jitter/phase noise problem if there really is one in the uBITX. 

-Justin N2TOH 

Re: SI5351 quadrature VFO

freefuel@...
 

Miguel, if you could get that output up around 225MHz that would be great for those of us in the United States. 

-Justin N2TOH 

Re: My first ubitx #ubitx

Bill Watkins
 

Kindred spirits lol

73

Bill
K0WHW


On Jun 14, 2018, at 15:49, Willy <W1LY@...> wrote:

It looks like you were sitting on my deck. Every detail. 73 Willy W1LY

On Thu, Jun 14, 2018 at 10:05 AM, Bill Watkins <kf7yxs@...> wrote:

Got my ubitx last week. Made my first contact yesterday with it, and I’m very pleased. 20 meters usb. Used qrp guys un-un plus wire antenna. Chicago to South Carolina.   Glad to be a part of the group. <9539FC7C_D816_497C_A347_B020D72A7122.jpeg>


Re: ic2 display problems #arduino ??? #arduino

Bill Watkins
 

Displays functional

image1.jpeg
image2.jpeg


On Jun 14, 2018, at 10:41, Jack Purdum via Groups.Io <jjpurdum@...> wrote:

I'm not sure, but I think the I2C interface expects to use A4 and A5 for the interface. One of the hardware guys can help you there.

Jack, W8TEE


On Thursday, June 14, 2018, 11:09:34 AM EDT, Bill Watkins <kf7yxs@...> wrote:


Thank you very much. 

Another question; should the original display still be enabled even though ic2 is programmed?  Not used at same time, but when swapped back the display acts as originally shipped. 

73,

Bill
K0WHW




On Jun 14, 2018, at 09:43, Jack Purdum via Groups.Io <jjpurdum@...> wrote:

Have you tried the display with one of the examples from the library just to make sure that you've 1) got a working display, and 2) it's wired correctly. Often a problem is that there are numerous LiquidCrystal libraries and they are substantially different. Unfortunately, Dr. Lee didn't follow the convention that gives the download URL for the library on the same line as the #include. That suggests to me that he's using the library that is shipped with the Arduino IDE. Check any examples that your manufacturer has to see if they give the download URL for the library. Also, there is a library for I2C LCD's:


You might give that a try as I don't think the standard IDE library is for I2C displays.

Jack, W8TEE




On Thursday, June 14, 2018, 10:24:35 AM EDT, Bill Watkins <kf7yxs@...> wrote:


Hello,
I have attempted to duplicate Ian Lee’s success. 1) I have latest firmware and manager. 2) tried 0x27 & 0x3F; neither makes a difference. Display manufacturer says 0x27 correct. 3) Checked voltages on bcc, sda, and scl; 4.48, 3.89, & 3.90 respectively.  4) display lights up and separate, new display lights up. No letters in either regardless address used. Unit still works and original display still works with ic2 settings when swapped back.

Anyone???!

Re: ic2 display problems #arduino ??? #arduino

Tom, wb6b
 

Hi,

Just a couple of general observations about I2C displays.

Yes, the I2C display uses the same pins as the SI5351 (A4, A5) for the interface connection. The SI5351 is a 3.3V part and the bus is set up to use 3.3V levels. The interface between the SI5351 and the Arduino relies on the 3.3V high level barely being in spec for the minimum acceptable "one" voltage for the Arduino (depending on which ATMega324 data sheet you look at). I believe the displays work just fine at the 3.3V bus levels.

Your display physically looks just like mine, however there are some that have the order of the data bits reversed. It seems some people/companies have modified the LiquidCrystal_I2C library for different parts/configurations and kindly kept the name the same. So there are several libraries and they may not all be compatible. To work with the CEC firmware the display should be using the PFC8574 I2C to parallel chip. 

It looks like the CEC firmware has included all the I2C LCD driver code in his sketch, so you don't need to worry about the library.

The CEC firmware can be used with two displays, but displays different information on each display.  

Tom, wb6b

Re: ic2 display problems #arduino ??? #arduino

Bill Watkins
 

Problem solved. Comment incorrect display, un-comment correct display. Thanks for all today who helped, and Thanks Dr. Lee

image1.jpeg

73


On Jun 14, 2018, at 17:17, Bill Watkins <kf7yxs@...> wrote:

Displays functional

image1.jpeg
image2.jpeg


On Jun 14, 2018, at 10:41, Jack Purdum via Groups.Io <jjpurdum@...> wrote:

I'm not sure, but I think the I2C interface expects to use A4 and A5 for the interface. One of the hardware guys can help you there.

Jack, W8TEE


On Thursday, June 14, 2018, 11:09:34 AM EDT, Bill Watkins <kf7yxs@...> wrote:


Thank you very much. 

Another question; should the original display still be enabled even though ic2 is programmed?  Not used at same time, but when swapped back the display acts as originally shipped. 

73,

Bill
K0WHW




On Jun 14, 2018, at 09:43, Jack Purdum via Groups.Io <jjpurdum@...> wrote:

Have you tried the display with one of the examples from the library just to make sure that you've 1) got a working display, and 2) it's wired correctly. Often a problem is that there are numerous LiquidCrystal libraries and they are substantially different. Unfortunately, Dr. Lee didn't follow the convention that gives the download URL for the library on the same line as the #include. That suggests to me that he's using the library that is shipped with the Arduino IDE. Check any examples that your manufacturer has to see if they give the download URL for the library. Also, there is a library for I2C LCD's:


You might give that a try as I don't think the standard IDE library is for I2C displays.

Jack, W8TEE




On Thursday, June 14, 2018, 10:24:35 AM EDT, Bill Watkins <kf7yxs@...> wrote:


Hello,
I have attempted to duplicate Ian Lee’s success. 1) I have latest firmware and manager. 2) tried 0x27 & 0x3F; neither makes a difference. Display manufacturer says 0x27 correct. 3) Checked voltages on bcc, sda, and scl; 4.48, 3.89, & 3.90 respectively.  4) display lights up and separate, new display lights up. No letters in either regardless address used. Unit still works and original display still works with ic2 settings when swapped back.

Anyone???!

Re: ic2 display problems #arduino ??? #arduino

Arv Evans
 

Bill  KF7YXS

There are a number of different I2C libraries.  The word "different" is key because some function
calls are definitely different.  Beauty and curse of libraries is that there are so many different ones
that claim to serve the same purpose.

Analog Pins A4 and A5 seem to be normal for I2C interfaces.  The Atmel datasheet for a Mega-328
shows that A4 and A5 connect internally to the TWI (2-Wire Interface) circuitry. 

http://tinyurl.com/y7nk9f54

However, there are exceptions where the TWI interface is not available.  In those cases you may
have to select a pair of digital pins and write your own bit-banging code to do the TWI protocol.

​An I2C interface usually requires 4.7K resistors as pull-up on the SDA and SCL leads.​  If you look at the
internal schematic for an OLED TFT display you will see that it only has pull-down current devices and no
pull-up components.  I fought with this for several days until I finally figured it out.  Enabling pull-up
function on the Arduino leads apparently is not adequate.  After adding the 4.7K pull-up resistors my display
came alive.

​If you want to have both LCD and TFT displays active it might be worthwhile to turn off the backlight on that
LCD when it is not needed.  This will decrease the amount of current drawn by that display.​

Arv K7HKL
_._
 

On Thu, Jun 14, 2018 at 4:17 PM Bill Watkins <kf7yxs@...> wrote:
Displays functional




On Jun 14, 2018, at 10:41, Jack Purdum via Groups.Io <jjpurdum@...> wrote:

I'm not sure, but I think the I2C interface expects to use A4 and A5 for the interface. One of the hardware guys can help you there.

Jack, W8TEE


On Thursday, June 14, 2018, 11:09:34 AM EDT, Bill Watkins <kf7yxs@...> wrote:


Thank you very much. 

Another question; should the original display still be enabled even though ic2 is programmed?  Not used at same time, but when swapped back the display acts as originally shipped. 

73,

Bill
K0WHW




On Jun 14, 2018, at 09:43, Jack Purdum via Groups.Io <jjpurdum@...> wrote:

Have you tried the display with one of the examples from the library just to make sure that you've 1) got a working display, and 2) it's wired correctly. Often a problem is that there are numerous LiquidCrystal libraries and they are substantially different. Unfortunately, Dr. Lee didn't follow the convention that gives the download URL for the library on the same line as the #include. That suggests to me that he's using the library that is shipped with the Arduino IDE. Check any examples that your manufacturer has to see if they give the download URL for the library. Also, there is a library for I2C LCD's:


You might give that a try as I don't think the standard IDE library is for I2C displays.

Jack, W8TEE




On Thursday, June 14, 2018, 10:24:35 AM EDT, Bill Watkins <kf7yxs@...> wrote:


Hello,
I have attempted to duplicate Ian Lee’s success. 1) I have latest firmware and manager. 2) tried 0x27 & 0x3F; neither makes a difference. Display manufacturer says 0x27 correct. 3) Checked voltages on bcc, sda, and scl; 4.48, 3.89, & 3.90 respectively.  4) display lights up and separate, new display lights up. No letters in either regardless address used. Unit still works and original display still works with ic2 settings when swapped back.

Anyone???!

Re: My first ubitx #ubitx

brad martin
 

I have yet to make a contact on mine and I think it’s because I can’t really find a good spot for my antenna and not wanting to drill any coax holes in this rental house. How do you like the qrp guys kit? I’m thinking about getting one and tossing a wire into the tree in the front of the house.

Brad

On Thu, Jun 14, 2018 at 6:15 PM Bill Watkins <kf7yxs@...> wrote:
Kindred spirits lol

73

Bill
K0WHW



On Jun 14, 2018, at 15:49, Willy <W1LY@...> wrote:

It looks like you were sitting on my deck. Every detail. 73 Willy W1LY
On Thu, Jun 14, 2018 at 10:05 AM, Bill Watkins <kf7yxs@...> wrote:

Got my ubitx last week. Made my first contact yesterday with it, and I’m very pleased. 20 meters usb. Used qrp guys un-un plus wire antenna. Chicago to South Carolina.   Glad to be a part of the group. <9539FC7C_D816_497C_A347_B020D72A7122.jpeg>