Date   

Re: #ubitx #ubitx-help Wow! the ubitx.net/ site is amazing! #ubitx #ubitx-help

Jerry Gaffke
 

What the uBitx offers is a simple, understandable, cheap hackable, open source rig.
That comes with tradeoffs.
You can learn a lot about radio by following posts in this forum and attempting a few mods.

As Bill says, a manual RF attenuator in front of the receiver is not a bad idea.
A pot in the RF going into the first mixer would work.
Audio derived AGC can work well enough.
ND6T had a clever hack for the Bitx40, not sure anybody has tried that on a uBitx:
    http://bitxhacks.blogspot.com/2017/01/nd6ts-rf-gain-control-with-tombstoning.html
    https://groups.io/g/BITX20/topic/4238539#20512

Power out can be varied by adjusting the voltage to the IRF510's.
SIdetone level is easy to implement by adding a pot.
There have been several of successful thump fixes over the years.
Harmonics and spurs on the v5 and v6 are acceptable for a 5W rig.

Jerry



On Sun, Sep 20, 2020 at 05:17 AM, Bill Cromwell wrote:
For portable operation beyond some park bench the uBitX is not the best choice. It is too big and consumes too much battery power. AGC and S-meters are absolutely not needed. There is no problem at all using an attenuator in the receive antenna line ahead of the first RF stage of the first mixer. I have and use such attenuators. They make the weakest signals pop out from under the big gun signals. AGC only further buries those signals. In actual operation outside the laboratory S-meters only give us a crude, wild guess about signal strength.

A "drive" control to throttle the power out output on transmit *is* very useful. Control of the CW sidetone level is desirable. Loud thumps, boops, and yoops are unwanted. Control over system bandwidth is needed. Harmonics and other spurious output are bad. None of those things requires a computer nor microcontroller. More computing power is not needed.

Other hams have other wants and preferences. More than a few will not try to copy the weakest signals. Others want to see the house lights dim with every dit and dah (or syllable). For some, page after page of menu items have replaced ranks and files of knobs and switches and meters and lights. For me the uBitX is a reasonably simple HF, low power radio. For size, simple operation, and field portability my PFR-3 far outperforms it.


Re: Ardunio nano D7

BevTed Stanier
 

Looks like this didn’t send earlier>>>

 

Hi Allard and Evan.

Yes I had installed this mod using a 2n2222 but took it out when it would not go into TX on key down CW. but as suggested the QSK was set to OFF. Then I reconnected the 2n2222 in the TX_RX wiring mod and now that works too.

Looks like the 2n2222 may not be quite as robust as the 2n3904 but does the job. I set the QSK delay to about 700ms which reduced the amount of switching between RX and TX (due to my slow CW) but I do get a spurious burst of noise when TX turns on. I have installed the PTT Sense mod but still get that noise. Output to a 50 ohm dummy load is about 4 volts p to p and not a good sine wave. I’ll do some more investigating as well as go back to setting the bias on the PA (current).

Thanks again..slow progress but fun.

 

Ted 73

 

Sent from Mail for Windows 10

 

From: Allard PE1NWL
Sent: Saturday, September 19, 2020 3:54 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Ardunio nano D7

 

Hi Ted,

For the TX-RX mod see https://github.com/amunters/bitx40/blob/master/TX-RX%20line%20wiring.png
Almost any standard NPN transistor will do the job. A 2n2222 should work fine!

73 Allard PE1NWL

 


Re: Ardunio nano D7

BevTed Stanier
 

Allard

 

Thanks Allard that explains a lot as to how this thing (cw) works.

More later.

 

Ted

 

Sent from Mail for Windows 10

 

From: Allard PE1NWL
Sent: Saturday, September 19, 2020 1:31 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Ardunio nano D7

 

Hi Ted,

also please make sure that semiQSK in ON in the SETTINGS menu (cw params section).
If it is OFF, you need to manually keep PTT activated while keying CW.,
If it is ON, PTT will become activated (TX) automatically as soon as you start keying CW, and deactivated (RX) after you stop keying.

73 Allard PE1NWL

 


Re: #ubitx #ubitx-help Wow! the ubitx.net/ site is amazing! #ubitx #ubitx-help

Bill Cromwell
 

Hi Loris,

For portable operation beyond some park bench the uBitX is not the best choice. It is too big and consumes too much battery power. AGC and S-meters are absolutely not needed. There is no problem at all using an attenuator in the receive antenna line ahead of the first RF stage of the first mixer. I have and use such attenuators. They make the weakest signals pop out from under the big gun signals. AGC only further buries those signals. In actual operation outside the laboratory S-meters only give us a crude, wild guess about signal strength.

A "drive" control to throttle the power out output on transmit *is* very useful. Control of the CW sidetone level is desirable. Loud thumps, boops, and yoops are unwanted. Control over system bandwidth is needed. Harmonics and other spurious output are bad. None of those things requires a computer nor microcontroller. More computing power is not needed.

Other hams have other wants and preferences. More than a few will not try to copy the weakest signals. Others want to see the house lights dim with every dit and dah (or syllable). For some, page after page of menu items have replaced ranks and files of knobs and switches and meters and lights. For me the uBitX is a reasonably simple HF, low power radio. For size, simple operation, and field portability my PFR-3 far outperforms it.

73,

Bill KU8H

bark less - wag more

On 9/20/20 4:58 AM, IW4AJR Loris wrote:
Hi Evan,
Rather than thinking about how to weigh down a rig born for QRP and portable uses with Hyper-micro at 32 or 64 bit or with additional PC connections and "base station" uses like "digital" ones, wouldn't it be better to think about the rig's "hardware deficiencies"?
More than thinking about the "software" it seems to me that are missing some vital parts for a QRP & portable rig:
- a decent AGC that intervenes on the signal of the MF chain and not on the BF signal and on the attenuation of the antenna input;
- an output power attenuation command (a decrease is often required rather than increasing the power);
- to try a little to think of the rig for its native use and not for "base station" uses for which it was not born.
If really you want to act on the software and on the micro used, I would advise you (if you don't want to lose all the OMs who use the IDE & hardware Arduino as a hobby) to think about how to transport the Libraries and the Main on the new NANO EVERY or NANO 33 platform.
In portable use, the fewer complications the better! , an example ? the current LCD monitor is more than enough for QRP & portable uses, useless "spectrum analyzers" (mostly unreal) or a shapeless mass of information that makes the monitor unreadable only serve to waste time for those who use the radio as HAM and not as a computer engineer!
By the way, just to say that I am not one who does not like software, I have finished a modification to the original Ver. 6.1 to view the S level in reception and the Power level in transmission, without the need to change micro (1 or 2 KB are enough and there is more), just be used to using Microprocessors for what they were born, not as if they were main-frames!
73 de IW4AJR Loris
On Sun, Sep 20, 2020 at 01:05 AM, Evan Hand wrote:
After thinking about the groups that I monitor in the prior email I
believe that I should mention another that fits into the "starter"
rig area:
https://groups.google.com/g/hermes-lite
This is not in Groups.io
The reason for adding it to the list is that in my opinion, it is
the current leader for me in the SDR transceiver arena for a new ham.
Pros:
- It has all of the SDR functionality
- It can be bought as a complete kit
- With a PC provides all of the digital modes with free software
addition
Cons:
- 5 watts out
- requires a PC
When you add in everything needed it is a close competition between
the uBITX and the HL2 for price and features.
I have gotten really spoiled with the waterfall display on both the
HL2 and my IC-7300.  That probably is the main reason for me siding
with the HL2.
The above are just opinions, not really supported with detailed
analysis.
Use as you see fit.
73
Evan
AC9TU


Re: #ubitx #ubitx-help Wow! the ubitx.net/ site is amazing! #ubitx #ubitx-help

Evan Hand
 

Hello Loris,
I believe that the right rig depends on what the rig is intended to do and how it will be used.  When I got back into the hobby 2 years ago I wanted to start with an inexpensive rig that would be my "base station."  This was driven by my wanting to keep costs down at first.  So after 35+ years of being away from the hobby and having disposed of all of my prior gear, I was starting from scratch.  I see this as similar to the new ham just starting out, and maybe not having the funds to buy a commercial rig.  So my point of view is for a low-cost rig that can do most of the HF bands and be able to do the other modes beyond SSB.  I was not, nor am I now, that interested in portable operation.

I will not dispute the deficiencies of the uBITX.  I have bought the AmatuerRadioKits case with all of the add on pieces including the AGC to fix some of those.  It just further drives up the cost of the uBITX, and may not be needed by the new ham.  At the same time modifying the rig to fix the spurs and harmonic issues of the v4 rig (that was the first one I bought) as well as adding on the "options" has sharped my soldering and troubleshooting skills.  It also highlighted to me that IF I want to pursue the building side of the hobby that I would need more test gear than just the DMM that I had at first.  That was another journey that is outside of the scope of this thread.

Since the first v4, I have bought another v4 and a v5.  With three in my shack, I decided to forgo the v6.  Instead, I went with the Hermes HL2.  Because of that, I do not have any experience in modifying the v6 code.  I do know from following what Reed N has done to correct some of the CW and screen updates that IF you implement his code, there is no room for other features.  I also believe that the processing power of the Nano is being pushed for the v6 functions.  If you want to do some serious digital signal processing then it may not have enough capability to do it.  Dr. Lee (KD8CEC) went with a second Nano to offload the signal processing functions.

As I state in almost every email that I post to this reflector, they are my opinions based on what I have experienced, or that you need to verify what I state.  Your opinions can differ, and that is OK with me.  We most likely have different goals that will point us in different directions.  I also appreciate any new information that comments or corrections can give me.  I am constantly trying to learn.

So thank you for the information,
73
Evan
AC9TU


Re: #ubitx #ubitx-help Wow! the ubitx.net/ site is amazing! #ubitx #ubitx-help

IW4AJR Loris <lorisbollina@...>
 

Hi Evan,
Rather than thinking about how to weigh down a rig born for QRP and portable uses with Hyper-micro at 32 or 64 bit or with additional PC connections and "base station" uses like "digital" ones, wouldn't it be better to think about the rig's "hardware deficiencies"?
More than thinking about the "software" it seems to me that are missing some vital parts for a QRP & portable rig:
- a decent AGC that intervenes on the signal of the MF chain and not on the BF signal and on the attenuation of the antenna input;
- an output power attenuation command (a decrease is often required rather than increasing the power);
- to try a little to think of the rig for its native use and not for "base station" uses for which it was not born.
If really you want to act on the software and on the micro used, I would advise you (if you don't want to lose all the OMs who use the IDE & hardware Arduino as a hobby) to think about how to transport the Libraries and the Main on the new NANO EVERY or NANO 33 platform.
In portable use, the fewer complications the better! , an example ? the current LCD monitor is more than enough for QRP & portable uses, useless "spectrum analyzers" (mostly unreal) or a shapeless mass of information that makes the monitor unreadable only serve to waste time for those who use the radio as HAM and not as a computer engineer!
By the way, just to say that I am not one who does not like software, I have finished a modification to the original Ver. 6.1 to view the S level in reception and the Power level in transmission, without the need to change micro (1 or 2 KB are enough and there is more), just be used to using Microprocessors for what they were born, not as if they were main-frames!

73 de IW4AJR Loris


On Sun, Sep 20, 2020 at 01:05 AM, Evan Hand wrote:
After thinking about the groups that I monitor in the prior email I believe that I should mention another that fits into the "starter" rig area:
https://groups.google.com/g/hermes-lite

This is not in Groups.io 

The reason for adding it to the list is that in my opinion, it is the current leader for me in the SDR transceiver arena for a new ham.   
Pros:
- It has all of the SDR functionality
- It can be bought as a complete kit
- With a PC provides all of the digital modes with free software addition
Cons:
- 5 watts out
- requires a PC

When you add in everything needed it is a close competition between the uBITX and the HL2 for price and features.

I have gotten really spoiled with the waterfall display on both the HL2 and my IC-7300.  That probably is the main reason for me siding with the HL2.

The above are just opinions, not really supported with detailed analysis.
Use as you see fit.
73
Evan
AC9TU


Re: No ssb out in ubitx v3 #ubitx #v3 #power

Nikhil B
 

Update.
The issue has been resolved. I gave it to other Ham. He did not find anything wrong he made modifications as in V5 and its working again.


Re: #ubitx #ubitx-help Wow! the ubitx.net/ site is amazing! #ubitx #ubitx-help

Evan Hand
 

After thinking about the groups that I monitor in the prior email I believe that I should mention another that fits into the "starter" rig area:
https://groups.google.com/g/hermes-lite

This is not in Groups.io 

The reason for adding it to the list is that in my opinion, it is the current leader for me in the SDR transceiver arena for a new ham.   
Pros:
- It has all of the SDR functionality
- It can be bought as a complete kit
- With a PC provides all of the digital modes with free software addition
Cons:
- 5 watts out
- requires a PC

When you add in everything needed it is a close competition between the uBITX and the HL2 for price and features.

I have gotten really spoiled with the waterfall display on both the HL2 and my IC-7300.  That probably is the main reason for me siding with the HL2.

The above are just opinions, not really supported with detailed analysis.
Use as you see fit.
73
Evan
AC9TU


Re: Ardunio nano D7

Allard PE1NWL
 

Hi Ted,

For the TX-RX mod see https://github.com/amunters/bitx40/blob/master/TX-RX%20line%20wiring.png
Almost any standard NPN transistor will do the job. A 2n2222 should work fine!

73 Allard PE1NWL


Re: #ubitx #ubitx-help Wow! the ubitx.net/ site is amazing! #ubitx #ubitx-help

Evan Hand
 

Joel,
I had noted the lack of updates as well.  The only explanation that I can think of is that there is not a lot of work being done on the v6, and the older versions are no longer available.

There are two major works for the v6:
1 - Reed N's software update that fixes a number of issues with the stock software, yet retains the stock display.
2 - The replacement of the stock display with a Nextion display and then update all software to the last version from KD8CEC.

The spurs and harmonics were fixed in the v5.
Including the case as an option made the case market diminish
The only major issue not covered has been the low transmit power on SSB due to the Boafeng mic.
There would be interest in adding extra display functions, like a panadapter and maybe some DSP for CW, however, none of that has caught on, even with the material from KD8CEC.
The other area not to get much traffic is upgrading the Nano to allow for more functions.  This would be something that I would be interested in.  There is a Teensy upgrade available.  I have not seen any traffic on what has been done with it.

It seems like the major traffic has moved to QRP-Labs as the uSDX effort.

These are just my observations monitoring the Groups.io feeds for the three threads:
https://groups.io/g/BITX20/topics
https://groups.io/g/QRPLabs/topics
https://groups.io/g/ucx/topics

plus others.

73
Evan
AC9TU


Re: #ubitx #ubitx-help Wow! the ubitx.net/ site is amazing! #ubitx #ubitx-help

 

So what ever became of http://ubitx.net/ , the sites info is rather dated.

Joel
N6ALT


SolderSmoke Podcast #225

Bill Meara
 


Re: Ardunio nano D7

BevTed Stanier
 

Bingo

Semi QSK was off. Now have 5v out of D7 and very small power out when holding PTT down and keying.

Next I’ll look at getting a transistor in there that will turn on the PTT relay. TX-RX mod. Made a note in my manual.

Will try to find out if a 2n2222 will do the job.

Thanks.

 

Ted

 

Sent from Mail for Windows 10

 

From: Allard PE1NWL
Sent: Saturday, September 19, 2020 1:31 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Ardunio nano D7

 

Hi Ted,

also please make sure that semiQSK in ON in the SETTINGS menu (cw params section).
If it is OFF, you need to manually keep PTT activated while keying CW.,
If it is ON, PTT will become activated (TX) automatically as soon as you start keying CW, and deactivated (RX) after you stop keying.

73 Allard PE1NWL

 


Re: Ardunio nano D7

Allard PE1NWL
 

Hi Ted,

also please make sure that semiQSK in ON in the SETTINGS menu (cw params section).
If it is OFF, you need to manually keep PTT activated while keying CW.,
If it is ON, PTT will become activated (TX) automatically as soon as you start keying CW, and deactivated (RX) after you stop keying.

73 Allard PE1NWL


Re: Ardunio nano D7

BevTed Stanier
 

Skip
Yes I did install that resistor.
Ted


On Sep 18, 2020, at 6:14 PM, Skip Davis via groups.io <skipnc9o@...> wrote:

Did you install the resistor in the key line?

Skip Davis, NC9O 

On Sep 18, 2020, at 18:43, BevTed Stanier <bevtedstan@...> wrote:

I have a BITX40 V3. I have installed the mods and updated the software to 1.29. Every thing works except CW TX. I,E, no power out.
The TX/RX mod does not operate by paralleling the PTT relay. The menu items all work OK. The CW tone works on key down.
I have checked D7 with the mod to the TR/TX mod disconnected and the D7 pin 16 does not change level.I.E. does not go high on key down.
I assume that the ARDUNIO NANO must be toast. 
Need advice on how to proceed. Is it possible to replace the NANO or do I need to replace the whole Radunio?
What is the best source for parts?
All advice would be appreciated.
73 VA7CTA   Ted 


Re: Connector

 

Hi,

The eBay listing was for a set of 5 connector pairs (m and f) with wires -- seems like a pretty good deal to me?  $1.40 for each set seems OK.

73,   Mark


Re: Ardunio nano D7

BevTed Stanier
 

Evan

 

Thanks for your reply. I do have a black wire going from A0 to C150 with a 10k resistor in series.

My thinking was that D7 was not activating the PTT which should activate the PTT Sense signal at A0. But looking at it again it looks like it’s the TX signal via the U3 to A0 is the PTT sense. I will check that there is a level change on pin 1 of U3 when the PTT relay is activated. Not sure what pin 1 of U3 is, just expected it was a 5v outlet. I’ll check what is happening on A0. Kind of like a chicken and egg situation maybe?

Thanks

Ted

 

Sent from Mail for Windows 10

 

From: Evan Hand
Sent: Friday, September 18, 2020 6:27 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Ardunio nano D7

 

Ted,
In reading through Allard's modification on Github, I noted that you need to install a PTT Sense line to A0 of the Nano.  In the writeup it states that SSB will transmit without the sense line, CW will NOT work without that addition.  There are other features that require the sens line per the writeup.
https://github.com/amunters/bitx40/blob/master/operating-instructions.md

Before you throw out the Nano, verify that the sense line is working. 
73
Evan
AC9TU

 


Re: Ardunio nano D7

Evan Hand
 

Ted,
In reading through Allard's modification on Github, I noted that you need to install a PTT Sense line to A0 of the Nano.  In the writeup it states that SSB will transmit without the sense line, CW will NOT work without that addition.  There are other features that require the sens line per the writeup.
https://github.com/amunters/bitx40/blob/master/operating-instructions.md

Before you throw out the Nano, verify that the sense line is working. 
73
Evan
AC9TU


Re: Ardunio nano D7

Skip Davis
 

Did you install the resistor in the key line?

Skip Davis, NC9O 

On Sep 18, 2020, at 18:43, BevTed Stanier <bevtedstan@...> wrote:

I have a BITX40 V3. I have installed the mods and updated the software to 1.29. Every thing works except CW TX. I,E, no power out.
The TX/RX mod does not operate by paralleling the PTT relay. The menu items all work OK. The CW tone works on key down.
I have checked D7 with the mod to the TR/TX mod disconnected and the D7 pin 16 does not change level.I.E. does not go high on key down.
I assume that the ARDUNIO NANO must be toast. 
Need advice on how to proceed. Is it possible to replace the NANO or do I need to replace the whole Radunio?
What is the best source for parts?
All advice would be appreciated.
73 VA7CTA   Ted 


Ardunio nano D7

BevTed Stanier
 

I have a BITX40 V3. I have installed the mods and updated the software to 1.29. Every thing works except CW TX. I,E, no power out.
The TX/RX mod does not operate by paralleling the PTT relay. The menu items all work OK. The CW tone works on key down.
I have checked D7 with the mod to the TR/TX mod disconnected and the D7 pin 16 does not change level.I.E. does not go high on key down.
I assume that the ARDUNIO NANO must be toast. 
Need advice on how to proceed. Is it possible to replace the NANO or do I need to replace the whole Radunio?
What is the best source for parts?
All advice would be appreciated.
73 VA7CTA   Ted 

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