Date   
Re: I need a V3 or V4 uBitx board.

 

Michael,

Thanks, I’ll give it a try as it is particularly bad on the SB. When I use a LM386 I usually build VK3YE’s version which has some good gain but tends to be more quiet. Steve pretty much used the application note version.

Joel
N6ALT

Re: Topic change

Sascha Bohnet | DL5SMB
 

Allison you wrote earlier that, if Q90 was changed to a BFR106, R81 (1kO) needs to be changed to somewhing between 2K-2,7kO. Is this correct?

Also, if C81 was changed to 470pF, do C261 and C262 also have to be removed? I think you wrote earlier, that these two capacitors could stay.
Also you did not wrote to also change R83 to 2,2O as Farhan does.

I just did these mods (changed Q90, R81, C81 and R83 - but left in C261 and C262) and though there is more power on the upper bands, I have only about 0,5 Watts on 80 and 40 Mhz. ( 5 W between 14 and 20 Mhz and 2 Watt on 10m).

What did I do wrong, did i miss something obvious?

I measured the voltage at R82 - according to messsage #43844 there should be 2,98V - I have about 1,5V (same frequency, 7150 Mhz). Was changing R81 wrong?

Sascha

New uBitx V3 QRP Transceiver For Sale $120 Shipped

alans77@...
 

New unopened V3 uBitx in sealed DHL bag for sale, $125 shipped to lower 48. Includes K5BCQ AGC and TX/RX click fix kits.This unit was received in mid April and will have the socketed TDA2822 audio amp chip. This extra radio was purchased in anticipation for a club project that never materialized.

73,
Alan N4AYE

Re: RFI from uBitx TX after AGC and other mods installed

alans77@...
 

Don: I have a similar problem only I have not installed the RF gain control. On SSB phone transmit my voice comes out of the speaker loud and clear. I find it strange the audio amp / speaker are not muted when transmitting.

73 ,
Alan

Re: I need a V3 or V4 uBitx board.

Guy N7BIR <sgbridge@...>
 

Hi Joel,
can you tell me the number designations on the relays that you keep in supply. I may have to make a swap out on my uBitX board. Thanks

Guy N7BIR 

Re: Keypad for Raduino...?

Arv Evans
 

Mark  N1VQW

I built a similar SNA, but control it via USB/tty link from a Raspberry-Pi. 

The keypad idea of using a single ADC input to decode keystrokes seems
intriguing to me.  This morning I set up the code so it uses a range of voltage
values for each key, and added a time delay for debounce.  using a voltage
range window seems to give me latitude enough for using standard value
resistors in the R-matrix.  Initially I set up the code to just show the value as
each key was pressed, then rewrote it to use those values as targets. 
I divided the difference between voltage values for each key by 2 and used
that to generate the tests for each key.  Code is not efficient yet as it is just a
bunch conditionals but once it is working I can go back and make it pretty. 
Next question is how much will RF affect the keystroke voltage readings?

This activity is generating some interesting thoughts about possibilities for a
new Raduino design...with OLED display, Keypad, Rotary Encoder, RTC,
Si5351a, and more.

Arv  K7HKL
_._



On Sun, Jun 24, 2018 at 11:34 AM Mark Pilant <mark@...> wrote:
Hi Arv.

I used a similar keyboard for a Scalar Network Analyzer I built.  (Before I
found out about the PHSNA :-)  It turned out to work very well.  I did run
into a few issues worth mentioning.

Make sure you have some form of switch debouncing (software or hardware) as
part of the design.  I had both in my design.   Also, make sure you take into
account the resistor tolerances when determining the analog value for any
given key.  (Part of my SNA design was a set of calibration tasks, one of
which was the keypad.)

I'm building a uBitx with a TFT, and may include a soft keypad to augment the
encoder.  (If I can find the time... too many projects :-)

73

- Mark  N1VQW

BTW, feel free to look at the SNA code: https://github.com/pilant/N1VQW-SNA




Re: Raduino consumption #ubitx #radiuno

Vince Vielhaber
 

On 06/24/2018 12:22 PM, Jerry Gaffke via Groups.Io wrote:
The Nano is tough to remove, if it comes to that.
I'd try a little rotary saw or grinder using my Dremel tool for all but
the pins hiding
behind the LCD connector, then heat up those few pins on the Nano board
to pull it free.
And then extract all the pins one-by-one from the Raduino.
And take care to wash all the metal bits from the Raduino.
If anybody has a better method, perhaps they could speak up.
It seems the easiest method I've heard anyone use I refer to as the RCA method. It's what the techs at the RCA service centers used when they had to replace modules on the TacTec hand helds.

Cut the part out, in this case the nano, then remove the pins one at a time.

Vince - K8ZW.
--
Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/
http://www.metalworkingfun.com

Re: RFI from uBitx TX after AGC and other mods installed

Don, ND6T
 

Alan,
How did you mount yours audio gating board? Where did you ground it? And are we talking about the K5BCQ kit on yours, too? Since it is not distorted I would almost bet that Q3 isn't turning off. Do you have an oscilloscope? -Don

Re: Keypad for Raduino...?

Arv Evans
 

Jack

I did consider that approach, but my original intent was to use the minimum number of
Arduino pins that could still support desired functionality.  This should open up pins for
doing much more than the existing Raduino can do.  While first application will be for
uBitx and BITX-40, it may evolve into a more generic controller for other radio designs.

If nothing else it is a good exercise to help me recover some of the age induced loss
of C-coding skills. 

Arv
_._


On Sun, Jun 24, 2018 at 11:42 AM Jack Purdum via Groups.Io <jjpurdum=yahoo.com@groups.io> wrote:
On Sunday, June 24, 2018, 1:34:36 PM EDT, Mark Pilant <mark@...> wrote:


Hi Arv.

I used a similar keyboard for a Scalar Network Analyzer I built.  (Before I
found out about the PHSNA :-)  It turned out to work very well.  I did run
into a few issues worth mentioning.

Make sure you have some form of switch debouncing (software or hardware) as
part of the design.  I had both in my design.  Also, make sure you take into
account the resistor tolerances when determining the analog value for any
given key.  (Part of my SNA design was a set of calibration tasks, one of
which was the keypad.)

I'm building a uBitx with a TFT, and may include a soft keypad to augment the
encoder.  (If I can find the time... too many projects :-)

73

- Mark  N1VQW

BTW, feel free to look at the SNA code: https://github.com/pilant/N1VQW-SNA




Re: RFI from uBitx TX after AGC and other mods installed

alans77@...
 

Hi Don: I mounted my K5BCQkit  board as shown in Kees photos. AGC appears to work. I do not have an O scope.

Alan

Re: Keypad for Raduino...?

Jack, W8TEE
 

That whole idea of using voltage to determine keyer state makes me nervous. Even something as simple as corrosion on the contacts can make a difference. Take Field Day. Some CW operators bring their own paddle sets to the event and switch when it's their turn at the helm. It's possible for something that simple to make enough of a difference to screw things up. Farhan worked out a solution that was defined by the constraints within which he had to work. My solution is to throw a new processor with a small forest of pins at the problem, which I've done. Others have gone to a less pin-intensive solution for the LCD display (e.g., I2C or SPI), thus freeing up pins that can directly read paddle states. Many simply don't care because they don't use CW.

You are right, however, in that the problem has caused people to rethink the problem(s) and that's almost always good. After all, if the only tool you have is a hammer, it's not surprising that all problems look like a nail.

Jack, W8TEE

On Sunday, June 24, 2018, 4:28:06 PM EDT, Arv Evans <arvid.evans@...> wrote:


Mark  N1VQW

I built a similar SNA, but control it via USB/tty link from a Raspberry-Pi. 

The keypad idea of using a single ADC input to decode keystrokes seems
intriguing to me.  This morning I set up the code so it uses a range of voltage
values for each key, and added a time delay for debounce.  using a voltage
range window seems to give me latitude enough for using standard value
resistors in the R-matrix.  Initially I set up the code to just show the value as
each key was pressed, then rewrote it to use those values as targets. 
I divided the difference between voltage values for each key by 2 and used
that to generate the tests for each key.  Code is not efficient yet as it is just a
bunch conditionals but once it is working I can go back and make it pretty. 
Next question is how much will RF affect the keystroke voltage readings?

This activity is generating some interesting thoughts about possibilities for a
new Raduino design...with OLED display, Keypad, Rotary Encoder, RTC,
Si5351a, and more.

Arv  K7HKL
_._



On Sun, Jun 24, 2018 at 11:34 AM Mark Pilant <mark@...> wrote:
Hi Arv.

I used a similar keyboard for a Scalar Network Analyzer I built.  (Before I
found out about the PHSNA :-)  It turned out to work very well.  I did run
into a few issues worth mentioning.

Make sure you have some form of switch debouncing (software or hardware) as
part of the design.  I had both in my design.   Also, make sure you take into
account the resistor tolerances when determining the analog value for any
given key.  (Part of my SNA design was a set of calibration tasks, one of
which was the keypad.)

I'm building a uBitx with a TFT, and may include a soft keypad to augment the
encoder.  (If I can find the time... too many projects :-)

73

- Mark  N1VQW

BTW, feel free to look at the SNA code: https://github.com/pilant/N1VQW-SNA




Re: Keypad for Raduino...?

Arv Evans
 

Jack

But......I thought this problem WAS a nail!  8-)

I did try 4 different keypads that have resided in my junkbox long enough to have
accumulated some dust and maybe even corrosion.  You are right, one of them (an
escapee from a long dead calculator) did show intermittent decoding, but after a bit
of exercise it now seems more reliable.  I built the initial resistor matrix external to
the keypad so I can try different keypads.  Maybe it would be worthwhile to try
making a discrete switch based keypad from 16 of the tiny push-switches that are
available for less than a cent each on Ebay? 

Long ago I purchased a few keypads which have plastic domes that click over-center
and make hard mechanical closures (with lots of contact bounce).  If I can find them
they will get tried in the present testbed.  Might be interesting to see what is required
to debounce those antiques. 

Being an ancient telephone engineer the concept of "sealing current" comes to mind
as a possibility for use based improvement of questionable keypads.  Another option
is that they are usually very inexpensive and thus the bad ones can be trashed with
no regrets. 

This is fun!  8-)

Arv
_._


On Sun, Jun 24, 2018 at 2:42 PM Jack Purdum via Groups.Io <jjpurdum=yahoo.com@groups.io> wrote:
That whole idea of using voltage to determine keyer state makes me nervous. Even something as simple as corrosion on the contacts can make a difference. Take Field Day. Some CW operators bring their own paddle sets to the event and switch when it's their turn at the helm. It's possible for something that simple to make enough of a difference to screw things up. Farhan worked out a solution that was defined by the constraints within which he had to work. My solution is to throw a new processor with a small forest of pins at the problem, which I've done. Others have gone to a less pin-intensive solution for the LCD display (e.g., I2C or SPI), thus freeing up pins that can directly read paddle states. Many simply don't care because they don't use CW.

You are right, however, in that the problem has caused people to rethink the problem(s) and that's almost always good. After all, if the only tool you have is a hammer, it's not surprising that all problems look like a nail.

Jack, W8TEE

On Sunday, June 24, 2018, 4:28:06 PM EDT, Arv Evans <arvid.evans@...> wrote:


Mark  N1VQW

I built a similar SNA, but control it via USB/tty link from a Raspberry-Pi. 

The keypad idea of using a single ADC input to decode keystrokes seems
intriguing to me.  This morning I set up the code so it uses a range of voltage
values for each key, and added a time delay for debounce.  using a voltage
range window seems to give me latitude enough for using standard value
resistors in the R-matrix.  Initially I set up the code to just show the value as
each key was pressed, then rewrote it to use those values as targets. 
I divided the difference between voltage values for each key by 2 and used
that to generate the tests for each key.  Code is not efficient yet as it is just a
bunch conditionals but once it is working I can go back and make it pretty. 
Next question is how much will RF affect the keystroke voltage readings?

This activity is generating some interesting thoughts about possibilities for a
new Raduino design...with OLED display, Keypad, Rotary Encoder, RTC,
Si5351a, and more.

Arv  K7HKL
_._



On Sun, Jun 24, 2018 at 11:34 AM Mark Pilant <mark@...> wrote:
Hi Arv.

I used a similar keyboard for a Scalar Network Analyzer I built.  (Before I
found out about the PHSNA :-)  It turned out to work very well.  I did run
into a few issues worth mentioning.

Make sure you have some form of switch debouncing (software or hardware) as
part of the design.  I had both in my design.   Also, make sure you take into
account the resistor tolerances when determining the analog value for any
given key.  (Part of my SNA design was a set of calibration tasks, one of
which was the keypad.)

I'm building a uBitx with a TFT, and may include a soft keypad to augment the
encoder.  (If I can find the time... too many projects :-)

73

- Mark  N1VQW

BTW, feel free to look at the SNA code: https://github.com/pilant/N1VQW-SNA




Receive audio terrible....out of calibration #ubitx #firmware

mtrager1@...
 

My unit came with firmware version 0.2! :(

Why is there such a low revision in it- just to get it working???

What is the best firmware available for it today and where can I find it?

I tried adjusting the calibration and BFO and that wasn't very much help!

Thank you,

Michael, n2zdb

Re: Receive audio terrible....out of calibration #ubitx #firmware

mtrager1@...
 

Oh I forgot....

Should I hear relays switching when the band is changed via the encoder?
The band switching function doesn't seem to be working either.....   because it's   FW 0.2?

Re: Keypad for Raduino...?

Jerry Gaffke
 

I've got a black dial phone from perhaps the 40's. in the basement somewhere.
That would be very cool to have as the UI into my uBitx.
Won't want to get just too aggressive with the debouce.


On Sun, Jun 24, 2018 at 01:58 pm, Arv Evans wrote:
But......I thought this problem WAS a nail!  8-)

I did try 4 different keypads that have resided in my junkbox long enough to have
accumulated some dust and maybe even corrosion.  You are right, one of them (an
escapee from a long dead calculator) did show intermittent decoding, but after a bit
of exercise it now seems more reliable.  I built the initial resistor matrix external to
the keypad so I can try different keypads.  Maybe it would be worthwhile to try
making a discrete switch based keypad from 16 of the tiny push-switches that are
available for less than a cent each on Ebay? 

Long ago I purchased a few keypads which have plastic domes that click over-center
and make hard mechanical closures (with lots of contact bounce).  If I can find them
they will get tried in the present testbed.  Might be interesting to see what is required
to debounce those antiques. 
 
Being an ancient telephone engineer the concept of "sealing current" comes to mind
as a possibility for use based improvement of questionable keypads.  Another option
is that they are usually very inexpensive and thus the bad ones can be trashed with
no regrets. 

This is fun!  8-)

Re: Keypad for Raduino...?

Arv Evans
 

😛


On Sun, Jun 24, 2018 at 3:05 PM Jerry Gaffke via Groups.Io <jgaffke=yahoo.com@groups.io> wrote:
I've got a black dial phone from perhaps the 40's. in the basement somewhere.
That would be very cool to have as the UI into my uBitx.
Won't want to get just too aggressive with the debouce.


On Sun, Jun 24, 2018 at 01:58 pm, Arv Evans wrote:
But......I thought this problem WAS a nail!  8-)

I did try 4 different keypads that have resided in my junkbox long enough to have
accumulated some dust and maybe even corrosion.  You are right, one of them (an
escapee from a long dead calculator) did show intermittent decoding, but after a bit
of exercise it now seems more reliable.  I built the initial resistor matrix external to
the keypad so I can try different keypads.  Maybe it would be worthwhile to try
making a discrete switch based keypad from 16 of the tiny push-switches that are
available for less than a cent each on Ebay? 

Long ago I purchased a few keypads which have plastic domes that click over-center
and make hard mechanical closures (with lots of contact bounce).  If I can find them
they will get tried in the present testbed.  Might be interesting to see what is required
to debounce those antiques. 
 
Being an ancient telephone engineer the concept of "sealing current" comes to mind
as a possibility for use based improvement of questionable keypads.  Another option
is that they are usually very inexpensive and thus the bad ones can be trashed with
no regrets. 

This is fun!  8-)

Re: Receive audio terrible....out of calibration #ubitx #firmware

Jerry Gaffke
 

The transmit LPF filter relays only get energized when transmitting.
There is no such band switching required when receiving.

>  My unit came with firmware version 0.2! :(
>  Why is there such a low revision in it- just to get it working???

A very easy fix for that, let's ask hfsignals to rename it version 200.

The KD8CEC firmware is well regarded.
  http://www.hamskey.com/

Jerry


On Sun, Jun 24, 2018 at 02:03 pm, <mtrager1@...> wrote:
Should I hear relays switching when the band is changed via the encoder?
The band switching function doesn't seem to be working either.....   because it's   FW 0.2?

Re: RFI from uBitx TX after AGC and other mods installed

Mark M
 

I have exactly the same situation with mine. I hear my voice loud & clear from the speaker, it's like a PA system.

It's Kees' kit installed like the photos...a three pin header, center to ground. The ground pin shows 0 ohm to ground with the board removed. I don't have the RF pot installed, just the jumper. When I remove the board and jumper the outer pins the radio works normally, no audio from the speaker on xmit. With the board in place, disconnecting the 5v stops the speaker audio.

I'm not sure the S meter driver is working either, I get less than 2 v even on a really strong BCB signal.

I'm afraid I might have reverse powered the board the first time I powered it up...the 5V marking was a little confusing, I think there was a thread about that here a while ago. It was not installed at that time, just hanging in mid air with the power & audio & s meter connections...I wanted to see if the S meter worked. I don't imagine that would have done it any good.

I have a borrowed scope so I can do some checking with that.

I also have a second kit that I haven't assembled yet. I might try it & see if it's any different (being careful with the power polarity).

Any advice will be appreciated.

Mark... AA7TA

On 6/24/18 1:18 PM, alans77 via Groups.Io wrote:
Don: I have a similar problem only I have not installed the RF gain control. On SSB phone transmit my voice comes out of the speaker loud and clear. I find it strange the audio amp / speaker are not muted when transmitting.
73 ,
Alan

Re: Keypad for Raduino...?

DuWayne Schmidlkofer
 

One of the easiest ways to do this might be to use a I2C expander configured something like this board from Microchip https://www.microchip.com/DevelopmentTools/ProductDetails/GPIODM-KPLCD
You could control the keyboard and display over I2C and free up the existing display pins for other uses.


--
DuWayne  KV4QB

Re: I need a V3 or V4 uBitx board.

Jerry Gaffke
 

Well, I tried to jump in.
Clicked the 40M option on his poll, no response.
Clicked VoteNow, and it said ThankYouForVoting, but still not in the list an a couple hours later.
Tried posting to the kd1jvdesigns@groups.io, clicked the green ReplyToGroup button, looked good,
except still not seeing it on the website an hour later.
Had sent email to Steve a few weeks ago when he said he had 10 remaining from the previous run,
never got a reply.

Well, I now see that the poll shows up a bit different in my browser if I click on the individual message
rather than try to vote using the web interface into the the "messages" page.
    https://groups.io/g/kd1jvdesigns/message/161
But I'm not so sure I want to promise to buy one if I can't communicate with him.

Could be some of this explains why Steve's not sure there's enough interest to do another run. 

Jerry



On Sun, Jun 24, 2018 at 10:56 am, Jerry Gaffke wrote:
I think groups.io is your best bet.
Steve has a poll going now, asking if there is interest in a new run of boards.
If you want one you should join the group and respond to that.
I may jump in there as well.

If and when he does decide to create more kits, he will post a message to the group
with instructions on how to order.  Not sure how that happens now, but his CW rigs
sold out fast and you had to respond within a few hours.

Steve did maintain a website in the past:  http://kd1jv.qrpradio.com/
but that has not been updated in years.
He's more interested in building radios than being a webmaster.

Jerry