Date   
Re: uBITX Firmware (CEC) 0.30 released (Test version). #ubitx

Mike Woods
 

Ian should have a guide available shortly to explain his software enhancements as a release version is almost there.  You are using the beta 0.34 version.   

At top left is the frequency of the other VFO, not currently in use.  So if you have VFO A in use this is VFO B frequency.  The middle section shows the step value on the encoder, and the right hand shows the key type - Iambic A, Iambic B or Straight Key.

I am finding the IF shift helpful, and I like being able to adjust the frequency step value by holding in the butto for about 2-3 seconds.

Mike


On Thu, 1 Feb 2018 at 9:27 AM, Je <emilus@...> wrote:
Congratulations to the author at first glance seems OK. But what is the 14.150k on the first line of the display?

Re: Audio gone on new ubitx

Mike Woods
 

Try a firmware reload?  Also check connections between board and raduino, and raduino and display.

M

On 1/02/18 10:17 AM, Erik Hokansson wrote:
I do have 12v at pin 2.. I was able to key up the P tt and use a keyer to transmit...they key word there is "was"..now the display just reflects the u bitx version and stays there 


--
Mike Woods
mhwoods@...

Re: Audio gone on new ubitx

 

Have you checked Q71? Try removing it. Go to CW mode and see if you get the CW side tone

Re: Nextion Display

Michael Monteith
 

Jack,
 The Nextion display only uses a serial port.  Software is written on the processor on the display to change the display contents based on data sent back and forth on the serial port.    This allows in this case the external processor to deal with data a processing and letting the display itself to handle graphics content. 

73, Michael
KM4OLT


On Wed, Jan 31, 2018 at 11:48 am, Jack Purdum wrote:
Fred:
 
Are you running the Nextion from the STM32? No driver issues?
 
Jack, W8TEE
 
 

Re: Nextion Display

Michael Monteith
 

Jerry,
 You can do a ESP32 Widora Air for about $12 with free shipping.   The ESP32 packs quite a punch in I/O, memory, and processing.  That and Bluetooth and WiFi.   The Widora particular package is about the same as the STM32 device you're talking about. 

73, Michael
KM4OLT

On Wed, Jan 31, 2018 at 01:32 pm, Jerry Gaffke wrote:
Scratch that.
The STM32F103C8 has a measly 64kbytes of flash, 20kbytes of ram.
For megabytes, you'll have to shell out $5 for the RasberryPi-zero.
. . .

Re: Spare/replacement part

 

As for T2 remove it from the board and check if the insulation has been removed from all leads. I have seen cases where one lead of coil still had the insulation causing an intermittent connection such as you have described.

Re: Software support Request for Full QSK BITX40

Jerry Gaffke
 

Gary,

Simulating just the IRF510 and T7, minimal load, driving the gate hard with a 0-10v square wave,
I see spikes to several kV as current through the IRF510 shuts off, but only if I slow the square wave down enough.
The simulation gets kind of weird with a load of 10k ohms or more

At 7mhz the IRF510 stays on, even in the troughs, even though the gate pin goes to zero volts.
I haven't looked at the model for the IRF510, but all it would take is resistance going into the gate 
and miller capacitance from drain to gate to account for this.

So T7 does indeed behave like a flyback transformer at slow speeds, but at 7mhz the IRF510
stays on to where that coil current always has somewhere to go, T7 behaves more like a forward transformer.

Jerry, KE7ER


On Wed, Jan 31, 2018 at 01:26 pm, Jerry Gaffke wrote:
With no load at the antenna port, the simulation shows an IRF510 drain current that stays near the quiescent 100ma
with perhaps 20ma pk-pk of RF riding on top of it.  (An initial spike that I'm ignoring here, as we would be increasing 
drive at audio rates.)    The drain current never goes toward zero, even when Q13 is driven with 400mv pk-pk.
Gate voltage is quite distorted, but does get down to 1.2v which should be enough to shut down the IRF510.
I'd guess that as the IRF510 shuts down the drain voltage rises, the gate-drain capacitance causes the gate voltage to rise,
and so the IRF510 continues to conduct.     When operating more slowly the IRF510 does indeed shut down as Vgs rises.

Found another case for the Ubitx

 

Re: UPLOAD FIRMWARE IN RADUINO

John Backo
 

What are those lights on the nano anyway? And do I need them?

There are usually 4 leds on the nano. They are usually in a row and
labeled "RX TX PWR L".

The RX and TX lights are connected to the lines that connect both the USB
interface and the ATMega628P. They connect to TX0 and RX0. They are very
useful as their flashing shows that communication is taking place during an
upload. Likewise, if RX flashes once and then not again during an upload,
there is a communications problem. Usually they are red and green; some may
be orange. Messing with them will probably mess up RX0 and TX0. It is
best to leave them alone. They are always out (low) with no serial communication
to the chip. If they stay on, something is wrong...

PWR refers to a direct connection to the voltage regulated 5v line. It is NOT
connected to the input voltage, whatever that may be. It is an indication that
the board has power either from Vin or USB. That is all it does. It is usually
red though I have seen many orange lights. It is useful, but it could be eliminated,
I guess.

L is connected to D13. It is a good light and should not be disconnected. If the
ATMega has a bootloader (which it should in a nano) this will flash three times
when the reset button is pushed and released. That is not guaranteed because
earlier versions of the bootloader did not show themselves through D13. And
if the ubiquitous Blink program is loaded, it will falsh D13. That alone makes it
a good light to retain. It is your "diagnostic visual indicator".

Anyway, that is what those leds do.

Hope this helps.

Re: Found another case for the Ubitx

Jim Sheldon
 

Got one on backorder for my third uBITX.  uBITX should ship pretty soon so I hope the case backorder doesn't take too long too.  I've used the smaller versionsions of this case on other projects and it's really nice to work with but the aluminum front and back panels are really soft aluminum so be careful drilling holes and cutting the LCD window.

Jim Sheldon, W0EB

Re: Fixing a blown Raduino board

John Backo
 

Bernie:

Usually a "ticking" noise is caused by communication
between the chip and the LCD. It may not be that, however.

Anyway it is a kind of "normal" RFI from a uPC. Usually it can be
eliminated with proper wire dressing or shielding. Most uBITX'ers
have used shielding on extension cables for the LCD because
that is when they hear it.

john
AD5YE

Re: Nextion Display

Dr Fred Hambrecht
 

Jack,

I am using the serial connection. No drivers needed.

 

v/r

Fred W4JLE

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Jack Purdum via Groups.Io
Sent: Wednesday, January 31, 2018 14:48
To: BITX20@groups.io
Subject: Re: [BITX20] Nextion Display

 

Fred:

 

Are you running the Nextion from the STM32? No driver issues?

 

Jack, W8TEE

 


From: Dr Fred Hambrecht <w4jle@...>
To: BITX20@groups.io
Sent: Wednesday, January 31, 2018 2:13 PM
Subject: [BITX20] Nextion Display

 

I may be late to the party, but I have just discovered the NEXTION display. I am using it on my BitX. What makes it really neat is the software that can be downloaded from the manufacturer's site. It takes all the pain out of graphics programming. I have also replaced the UNO with an STM32 as in addition to the normal stuff I have added a GPS module to display time/location/grid square data as well as using the 1PPS to do a continuous correction to the SI oscillator. The higher resolution allows calculating the SWR etc with much finer gradations.  I will be adding a filter board from a CODAN that will allow all band operation.(bought for $12.00 on EBay). Amazing what is available to the homebrewer today!

 

Re: Software support Request for Full QSK BITX40

Jerry Gaffke
 

If the IRF510 gate is driven hard with a square wave, it switches fine at 7mhz and beyond, showing a nice square wave
for drain voltage (0-24v) and drain current with troughs all the way to zero.  That's with a 50 ohm antenna load, supply at 12v.

If the antenna port impedance is 10000 ohms at 7mhz, those drain and antenna port voltages roughly double,
and drain currents are kept fairly small.    I assume the lack of major voltage spikes is because
there remains some drain current in the troughs due perhaps to miller effect capacitance

If the antenna port impedance is 10000 ohms at 7khz, the simulation shows
the kilovolt spikes I'd expect from a flyback transformer.
  
Quite curious.
But I think I'm ready to start playing with the uBitx, as the push-pull final there should be more predictable.

Jerry


On Wed, Jan 31, 2018 at 03:32 pm, Jerry Gaffke wrote:
So T7 does indeed behave like a flyback transformer at slow speeds, but at 7mhz the IRF510
stays on to where that coil current always has somewhere to go, T7 behaves more like a forward transformer.

Re: Found another case for the Ubitx

Bob McMillan
 

I have one on back order. I have the smaller one and I just can’t get the ubitx in it. However it is a nice case so I backordered the bigger one
Bob
W5rkm

On Jan 31, 2018, 5:34 PM -0600, wishbone_aaa <dlmock@...>, wrote:
Looks like this would be a good candidate.
https://www.circuitspecialists.com/metal-instrument-enclosure-la-6.html



Re: New case found

Tim Gorman
 

I believe you will find that the front and rear panels for these cases are isolated electrically from the rest of the cabinet. They nestle into the plastic rim around the front and the back. 

If you want an RF proof enclosure you will have to run a ground wire from the panels to the rest of the case. 

Re: uBITX AM BCI Filter #ubitx

John <passionfruit88@...>
 

Hello Nick,

This is looking very good.

I will try a quick version tomorrow with T68-6 toroids (the smallest size I have handy) in the antenna circuit just to see how much attenuation I get. I am using the same circuit as yours and re-calculated the turns for the T68-6.

If that works I will order some small T30-6 toroids and do the same a you.

Please let me know the results when you wire yours up. I will keep you informed of my results.

All the best,

73, John (VK2ETA)

[uBITX] Key line resistor: OK to mount on Raduino board?

K5DH
 

There is a 4700 Ohm pullup resistor that must be installed between +5 V and the key line.  The wiring instructions show it being installed at the key jack.  Is it OK to install it on the Raduino board, on the solder side of the Digital connector?  Or is soldering to that board too risky? 

73/72,
Dean K5DH
uBITX msn 279

Re: [uBITX] Key line resistor: OK to mount on Raduino board?

Jerry Gaffke
 

Should be fine, only concern might be if your soldering iron was faulty and the tip was not at ground potential. 
In fact, installing the 4.7k at the Raduino may be slighty preferred,
as there's less chance of the rig unexpectedly transmitting due to an open cable or connector. 


On Wed, Jan 31, 2018 at 06:11 pm, K5DH wrote:
There is a 4700 Ohm pullup resistor that must be installed between +5 V and the key line.  The wiring instructions show it being installed at the key jack.  Is it OK to install it on the Raduino board, on the solder side of the Digital connector?  Or is soldering to that board too risky? 

Re: Nextion Display

Jack Purdum
 

How's the refresh rate? Any flicker?

Jack, W8TEE



From: Dr Fred Hambrecht <w4jle@...>
To: BITX20@groups.io
Sent: Wednesday, January 31, 2018 7:43 PM
Subject: Re: [BITX20] Nextion Display

Jack,
I am using the serial connection. No drivers needed.
 
v/r
Fred W4JLE
 
 
From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Jack Purdum via Groups.Io
Sent: Wednesday, January 31, 2018 14:48
To: BITX20@groups.io
Subject: Re: [BITX20] Nextion Display
 
Fred:
 
Are you running the Nextion from the STM32? No driver issues?
 
Jack, W8TEE
 

From: Dr Fred Hambrecht <w4jle@...>
To: BITX20@groups.io
Sent: Wednesday, January 31, 2018 2:13 PM
Subject: [BITX20] Nextion Display
 
I may be late to the party, but I have just discovered the NEXTION display. I am using it on my BitX. What makes it really neat is the software that can be downloaded from the manufacturer's site. It takes all the pain out of graphics programming. I have also replaced the UNO with an STM32 as in addition to the normal stuff I have added a GPS module to display time/location/grid square data as well as using the 1PPS to do a continuous correction to the SI oscillator. The higher resolution allows calculating the SWR etc with much finer gradations.  I will be adding a filter board from a CODAN that will allow all band operation.(bought for $12.00 on EBay). Amazing what is available to the homebrewer today!
 


Re: Nextion Display

Jack Purdum
 

Did not know that, as I've never had one. Thanks!

Jack, W8TEE



From: Michael Monteith via Groups.Io <michael_r_monteith@...>
To: BITX20@groups.io
Sent: Wednesday, January 31, 2018 6:24 PM
Subject: Re: [BITX20] Nextion Display

Jack,
 The Nextion display only uses a serial port.  Software is written on the processor on the display to change the display contents based on data sent back and forth on the serial port.    This allows in this case the external processor to deal with data a processing and letting the display itself to handle graphics content. 

73, Michael
KM4OLT

On Wed, Jan 31, 2018 at 11:48 am, Jack Purdum wrote:
Fred:
 
Are you running the Nextion from the STM32? No driver issues?
 
Jack, W8TEE