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Pete's Bench The Dentron Project The Spillsbury Tindall SBX-11A KK4DAS and the Simple SSB Group Build TenTec mods Shack Mystery solved.? Maybe? Changing the channels at age 9?
Bill's Bench Why LSB below 10 MHz? The "SSB Legend" Rig WU2D RTL-Dongle Up converter Understanding the Gilbert (Jones) Cell SDRSmart? RTL-SDR.com V3 Dongle? VK3HN and 2 meter SSB Jack NG2E, MMM and the 10 minute transmitter KD4EBM sends me SST by Wayne Burdick. DX!?? A new computer?
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The v6 voltage divider pulls at different strengths for dot and dit. If you try and send a symbol that is the stronger pull, there's a small window on the way up and down where the voltage will be at the value where the weaker pull usually rests. I have two keys, and if I try and send only dits, if I send enough of them on either, I eventually get a dit-dah like you described. However, I've never had an accidental dit after sending only dots. 
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Hi Reed,
The wrong *time*? I am confused. Is it a successive-approximation A-D?
I just hauled the Bencher out to the garage and cleaned the contacts with
De-Oxit and lacquer thinner. Now seems to be working fine. Time to take
off the dummy load and make some contacts!
- Jerry
toggle quoted message
Show quoted text
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Yep. That's because the hardware implementation is a voltage divider, and if it happens to sample at the wrong time, it will catch the intermediate state.
Reed
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It seems that - just occasionally - when you hit the "dit" paddle, the thing will go
"dit dah", instead of just "dit".
- Jerry KF6VB
toggle quoted message
Show quoted text
On 2021-05-15 08:25, jerry@... wrote: Hello all,
Practicing CW with the v6, a dummy load, and a Bencher paddle.... I
seem to be making more mistakes than
with other systems ( e.g. a Kenwood TS590S ) and the same paddle.
There's something strange going on with the
"feel" or timing or something.
Can anybody supply a clue?
- Jerry KF6VB
|
Hello all,
Practicing CW with the v6, a dummy load, and a Bencher paddle.... I seem to be making more mistakes than
with other systems ( e.g. a Kenwood TS590S ) and the same paddle. There's something strange going on with the
"feel" or timing or something.
Can anybody supply a clue?
- Jerry KF6VB
|
I made a few changes to the firmware which some may like, so I am posting my changes here.? Also, there is a small bug in the sideband selection code that seems also to exist in the v5 and v6 stock firmware, so you may want to change that.
Change to ubitx_v4.3_code.ino:
* McNabb (N7EKU)
?*?? Change to smaller speed steps (was 50, 500, 10000)
?*?? Change to bigger trigger, s, action (was 0, 2, 4)
?*?? Fix sideband selection (frequency should have >= condition)
?*/
void doTuning(){
? int s;
? unsigned long prev_freq;
? s = enc_read();
? if (s != 0){
??? prev_freq = frequency;
??? if (s > 6)
????? frequency += 1250l;
??? else if (s > 2)
????? frequency += 100l;
??? else if (s > 0)
????? frequency +=? 10l;
??? else if (s < -6)
????? frequency -= 1250l;
??? else if (s < -2)
????? frequency -= 100l;
??? else
????? frequency -= 10l;
??? if (prev_freq < 10000000l && frequency >= 10000000l)
????? isUSB = true;
???? ?
??? if (prev_freq >= 10000000l && frequency < 10000000l)
????? isUSB = false;
??? setFrequency(frequency);
??? updateDisplay();
? }
}
Change to ubitx_menu.ino:
//# Menu: 1
/*
?* McNabb (N7EKU) Menu 1 Change
?*?? Change title from "Band Select" to "Speed Tune"
?*?? Change step change from 0.2MHz to 0.1MHz
?*?? Reduce knob sensitivity (knob < -2 and > 2 instead of < 0 or > 0)
?*/
int menuBand(int btn){
? int knob = 0;
? int band;
? unsigned long offset;
?// band = frequency/1000000l;
?// offset = frequency % 1000000l;
?? ?
? if (!btn){
?? printLine2("Speed Tune??? \x7E");
?? return;
? }
? printLine2("Speed Tune:");
? //wait for the button menu select button to be lifted)
? while (btnDown())
??? active_delay(50);
? active_delay(50);?? ?
? ritDisable();
? while(!btnDown()){
??? knob = enc_read();
??? if (knob != 0){
????? /*
????? if (band > 3 && knob < 0)
??????? band--;
????? if (band < 30 && knob > 0)
??????? band++;
????? if (band > 10)
??????? isUSB = true;
????? else
??????? isUSB = false;
????? setFrequency(((unsigned long)band * 1000000l) + offset); */
????? if (knob < -2 && frequency > 3000000l)
??????? setFrequency(frequency - 100000l);
????? if (knob > 2 && frequency < 30000000l)
??????? setFrequency(frequency + 100000l);
????? if (frequency >= 10000000l)
??????? isUSB = true;
????? else
??????? isUSB = false;
????? updateDisplay();
??? }
??? checkCAT();
??? active_delay(20);
? }
? while(btnDown())
??? active_delay(50);
? active_delay(50);
?
? printLine2("");
? updateDisplay();
? menuOn = 0;
}
The changes I made were mainly to tame the automatic tune speed up so it doesn't react so fast, and to also allow more fine grained tuning (10Hz) and to make the knob a bit less sensitive to small movements.? I also changed the "Band Change" menu selection to "Speed Tune" since it really doesn't change to specific bands, and I slowed the tune rate there also.
With these changes, I find the auto speed up is now easy to use and I can still make small frequency adjustments.? I like the auto speed change feature so that I don't have to change the speed steps all the time, but the stock firmware settings were too fast for me :-/
The sideband selection problem I noticed when moving quickly across 10MHz the sideband changed fine, but when moving slowly at a 10Hz rate it didn't change reliably from LSB to USB and back.? With the change I made, it works fine all the time now.
I can post compiled firmware in the files section here if requested.
Cheers,
Mark
PS:? According to John/VK2ETA, both RX and TX can be improved by increasing the SI5351 clock driver power from 4ma (as in v3 code) to 8ma (as in
v5 code.? Make the change in ubitx_si5351.ino if desired.
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All,
So with all the fun with playing with the firmware on my uBITXv6, I blew away the factory calibration, and had to redo it. I used the BFO alignment aid ( what a wonderful tool! ) and my radio is receiving fine...except:
1. I tune in an LSB signal on 40M. Loud and clear.
2. Punch the "USB" button on the screen. Mode now USB.
3. NO CHANGE to the received signal!
What's going on? I would expect
...the received signal to go away ( if the display shows CARRIER frequency )
or
...The received signal to turn into Donald Duck quacking ( if the Display shows the frequency actually being received )
The plot thickens: The received signal DOES go away if you nudge the tuning knob. Nudge it back to where it was, and the
received signal is still gone. Change to the correct sideband, nudge the tuning knob, and it comes back.
...So the sideband is only selected if there is a frequency change.
- Jerry KF6VB
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Re: CNC encoder for ubitx
why does this group have people smarter than?me?
You would get 2.4 Farhan!
One turn of tune shaft should turn encoder 10 times to get 240.
At 15/05/2021, you wrote:
Why not pulley-and+thread the
existing encoder to a smaller shaft? If the drum Diameter on the encoder
is 10 times the diameter of your tuning shaft, you will be 240 pulses
instead of 24.
On Sat 15 May, 2021, 8:22 AM Arv Evans,
<arvid.evans@...>
wrote:
- Optical encoders that drive a small computer like an Arduino should
- be easy to handle in software.?? It the number of states per
revolution
- is too high, just use a software divider to lower the number of
states.
- If the number of mechanical states is too low, it should be easy to
- make a state multiplier for 2X, 3X, etc.??
- Arv
- _._
- On Fri, May 14, 2021 at 7:33 PM Jack, W8TEE via
<jjpurdum=[email protected]
> wrote:
- Joe:
- There are a lot of optical encoders that can approach 200 ppr, but
they're not cheap. I think I saw one on eBay for less that $30, but that
was several weeks ago. Some go as high as several hundred
dollars...probably way overkill for your needs. What is a "better
encoder" to you? I'm working on an SDT and I have a $1.50 encoder in
it and it's fine for me. However, I like detents as they prevent me from
"coasting" past a desired frequency.
- As to buying a subscription, truth be told, almost anything you see
in print today can be slightly modified and then posted on the Net. My
publisher once told me that for every book I sell, 5 are downloaded for
free. The real cost is not what I lose, but the books that don't get
written because it's just not worth it anymore. However, we really do
need to support the magazines that interest us. Ham Radio, Electronics
Illustrated, 73 Magazine, Radio News and others...gone. Give up a
dinner out and buy a subscription to one that still exists: CQ, QST,
QRPQ, Sprat, RadCom and others...any one of them is worth
it.
- Jack, W8TEE
- On Friday, May 14, 2021, 6:34:29 PM EDT,
jereed@...
<jereed@...>
wrote:
- Jack,
- That would be very cool.?? But darn, I?€?d have to subscribe to
CQ.?? If they go for it let me know and I?€?ll subscribe.
- I?€?ve been wondering about a better encoder.?? Something like
200 PPR so a dial rotation would come out at 2KHz at 10 Hz.?? I
bought one on eBay but it is for industrial counting of things and not
smooth enough for a VFO.?? So most def, I am interested in such a
column.
- And I like your topic immensely,
- Joe N9JR
- --
- Jack, W8TEE
|
Re: CNC encoder for ubitx
You would get 2.4 Farhan!
One turn of tune shaft should turn encoder 10 times to get 240.
At 15/05/2021, you wrote:
toggle quoted message
Show quoted text
Why not pulley-and+thread the
existing encoder to a smaller shaft? If the drum Diameter on the encoder
is 10 times the diameter of your tuning shaft, you will be 240 pulses
instead of 24.
On Sat 15 May, 2021, 8:22 AM Arv Evans,
<arvid.evans@...>
wrote:
- Optical encoders that drive a small computer like an Arduino should
- be easy to handle in software.?? It the number of states per
revolution
- is too high, just use a software divider to lower the number of
states.
- If the number of mechanical states is too low, it should be easy to
- make a state multiplier for 2X, 3X, etc.??
- Arv
- _._
- On Fri, May 14, 2021 at 7:33 PM Jack, W8TEE via
<jjpurdum=[email protected]
> wrote:
- Joe:
- There are a lot of optical encoders that can approach 200 ppr, but
they're not cheap. I think I saw one on eBay for less that $30, but that
was several weeks ago. Some go as high as several hundred
dollars...probably way overkill for your needs. What is a "better
encoder" to you? I'm working on an SDT and I have a $1.50 encoder in
it and it's fine for me. However, I like detents as they prevent me from
"coasting" past a desired frequency.
- As to buying a subscription, truth be told, almost anything you see
in print today can be slightly modified and then posted on the Net. My
publisher once told me that for every book I sell, 5 are downloaded for
free. The real cost is not what I lose, but the books that don't get
written because it's just not worth it anymore. However, we really do
need to support the magazines that interest us. Ham Radio, Electronics
Illustrated, 73 Magazine, Radio News and others...gone. Give up a
dinner out and buy a subscription to one that still exists: CQ, QST,
QRPQ, Sprat, RadCom and others...any one of them is worth
it.
- Jack, W8TEE
- On Friday, May 14, 2021, 6:34:29 PM EDT,
jereed@...
<jereed@...>
wrote:
- Jack,
- That would be very cool.?? But darn, I?€?d have to subscribe to
CQ.?? If they go for it let me know and I?€?ll subscribe.
- I?€?ve been wondering about a better encoder.?? Something like
200 PPR so a dial rotation would come out at 2KHz at 10 Hz.?? I
bought one on eBay but it is for industrial counting of things and not
smooth enough for a VFO.?? So most def, I am interested in such a
column.
- And I like your topic immensely,
- Joe N9JR
- --
- Jack, W8TEE
|
Re: Question about voltage regulator
Hello,
What I saw is actually a tough one, but doesn¡¯t interfere with the operation.
Besides I did the test to remove it and put 2 separate power supplies of 5V and 12V, my parasitic noise does not leave.
If you want for low noise regulator mountings, I found regulators based on LT3045. There are many models.
Example:
cdt
|
Re: CNC encoder for ubitx
Why not pulley-and+thread the existing encoder to a smaller shaft? If the drum Diameter on the encoder is 10 times the diameter of your tuning shaft, you will be 240 pulses instead of 24.
Optical encoders that drive a small computer like an Arduino should
be easy to handle in software.? It the number of states per revolution
is too high, just use a software divider to lower the number of states. If the number of mechanical states is too low, it should be easy to
make a state multiplier for 2X, 3X, etc.?
Arv _._
Joe:
There are a lot of optical encoders that can approach 200 ppr, but they're not cheap. I think I saw one on eBay for less that $30, but that was several weeks ago. Some go as high as several hundred dollars...probably way overkill for your needs. What is a "better encoder" to you? I'm working on an SDT and I have a $1.50 encoder in it and it's fine for me. However, I like detents as they prevent me from "coasting" past a desired frequency.
As to buying a subscription, truth be told, almost anything you see in print today can be slightly modified and then posted on the Net. My publisher once told me that for every book I sell, 5 are downloaded for free. The real cost is not what I lose, but the books that don't get written because it's just not worth it anymore. However, we really do need to support the magazines that interest us. Ham Radio, Electronics Illustrated, 73 Magazine, Radio News and others...gone. Give up a dinner out and buy a subscription to one that still exists: CQ, QST, QRPQ, Sprat, RadCom and others...any one of them is worth it.
Jack, W8TEE
Jack,
That would be very cool.? But darn, I¡¯d have to subscribe to CQ.? If they go for it let me know and I¡¯ll subscribe.
I¡¯ve been wondering about a better encoder.? Something like 200 PPR so a dial rotation would come out at 2KHz at 10 Hz.? I bought one on eBay but it is for industrial counting of things and not smooth enough for a VFO.? So most def, I am interested in such a column.
And I like your topic immensely,
Joe N9JR
--
Jack, W8TEE
|
Re: micro bitx kit from 2018
#ubitx
Trystan
I am thinking there is a large population of v3 and v4, I wonder if they might outnumber the later versions. Our local club did a group build, more than 2 dozen. Actually my v4 was originally decently clean on about half of the bands each in cw and ssb. Improving it was much of the adventure, but honestly much more global interest in customizing them. I appreciate for some places on the globe hams use it as a primary rig. I have better rigs that sometimes sit for weeks at a time while I make contacts and or improve the ubitx.?
Occasionally I call someone dx even on ssb with the ubitx, and if I give my call twice they can be quite annoyed when we double, when they copy me the first time. A rig whose circuit boards cost maybe 3 or 4 loads of fuel for our automobile is quite a treasure. But surprising how much time many of us have invested in hardware and code, and have vastly spread the knowledge.?
73 Curt
|
Re: CNC encoder for ubitx
Optical encoders that drive a small computer like an Arduino should
be easy to handle in software.? It the number of states per revolution
is too high, just use a software divider to lower the number of states. If the number of mechanical states is too low, it should be easy to
make a state multiplier for 2X, 3X, etc.?
Arv _._
Joe:
There are a lot of optical encoders that can approach 200 ppr, but they're not cheap. I think I saw one on eBay for less that $30, but that was several weeks ago. Some go as high as several hundred dollars...probably way overkill for your needs. What is a "better encoder" to you? I'm working on an SDT and I have a $1.50 encoder in it and it's fine for me. However, I like detents as they prevent me from "coasting" past a desired frequency.
As to buying a subscription, truth be told, almost anything you see in print today can be slightly modified and then posted on the Net. My publisher once told me that for every book I sell, 5 are downloaded for free. The real cost is not what I lose, but the books that don't get written because it's just not worth it anymore. However, we really do need to support the magazines that interest us. Ham Radio, Electronics Illustrated, 73 Magazine, Radio News and others...gone. Give up a dinner out and buy a subscription to one that still exists: CQ, QST, QRPQ, Sprat, RadCom and others...any one of them is worth it.
Jack, W8TEE
Jack,
That would be very cool.? But darn, I¡¯d have to subscribe to CQ.? If they go for it let me know and I¡¯ll subscribe.
I¡¯ve been wondering about a better encoder.? Something like 200 PPR so a dial rotation would come out at 2KHz at 10 Hz.? I bought one on eBay but it is for industrial counting of things and not smooth enough for a VFO.? So most def, I am interested in such a column.
And I like your topic immensely,
Joe N9JR
--
Jack, W8TEE
|
Re: CNC encoder for ubitx
Jack
Me too.? It sounds like fun!
Arv _._
Hi Arv:
I misunderstood what you were saying for the?clear dumb terminal. Your solution works fine, is easy to code...what's not to like? If the column does come into existence, I hope readers will write in with questions. Unfortunately, I won't always have the answer, but perhaps I can find someone who does.
I hope it happens!
Jack, W8TEE
On Friday, May 14, 2021, 5:35:18 PM EDT, Arv Evans < arvid.evans@...> wrote:
Jack
At the risk of giving away some content that may have been better saved
for your column, I was talking about the pseudo dumb terminal that is part
of the Arduino IDE.? To the best of my knowledge there is no command that
be sent by the attached Arduino to clear this pseudo-terminal screen. My solution is to have the Arduino code send a series of "\n" commands
to the dumb terminal emulator.? At 9600 or above this happens so fast that
existing screen content is simply scrolled off the screen and disappears
without even a flicker.?
Code has been added to BitLash to allow it to poll and write to various ports in modes that provide ham radio type interfaces (i.e. SWR, PWR, REV, FWD,
MODE, FREQUENCY, FREQUENCY STEP SIZE, FREQUENCY STEP RATE, VFO-A, VFO-B, VFO-C, VFO-D, and so on).? BitLash can be rebuilt to be both
attached computer with, or without CAT controls for various type of CAT...even
the Schr?dinger's version!
?
As you know, many of those here have only recently started to teach
themselves C-language.? My typical mistakes may be of interest to them as they make similar mistakes and have related questions.? Others are
like me, old codgers with poor memories, and need all the help we can get.
Arv _._
Hi Arv:
All of those would be interesting, but I don't know anything about BitLash other than what it is. Usually, a device being used as a screen (e.g., 16x2 display or TFT color display) will have doc sheets telling what the commands are for a clear screen (and other things, like cursor positioning). Reading push buttons or a keyboard is really the same thing, only a keyboard usually has more switches that the microcontroller has pins, so some kind of interface is normally used. The current project I'm working on (an SDT) uses one pin to control 16 switches, saving me 15 pins for other uses. Those are the kinds of things I want to highlight.
I do have to keep in mind that I need to provide a solution in a fairly small number of paragraphs. Still, I think it would be nice to have a place where software topics can be discussed. If it does happen, I would also like to present the ideas/solutions of others, too.
Jack, W8TEE
On Friday, May 14, 2021, 4:30:42 PM EDT, Arv Evans < arvid.evans@...> wrote:
Jack
Of course I would be interested.? I might even be able to contribute some
problems and maybe some solutions for the column.
Things that immediately come to mind: - How to do a Screen Clear on the dumb terminal in an Arduino IDE.
- How to integrate commands from both push-buttons and a keyboard.
- BitLash, further development for Arduino.
- Using the Arduino dumb terminal with and without keystroke echoing.
- And several more things that have bugged me in my most recent projects.
Arv? K7HKL _-_
All:
I have an article coming out in (I think) the June issue of CQ that talks a little bit about software. The article is an experiment to see if there is any interest in a quarterly column about software "stuff". There will be an email address at the end of that article where readers can write in and say Yay (I'd like to see more) or Nay (I've seen enough). Rich will take a look at the responses and decide if a column is a good idea. You already know how I feel about it. This encoder thing would be the type of theme for a column. Generally, each column would state a problem (How can I control 16 switches with 1 I/O pin?) and then the article would discuss one solution to it. (There is no such thing as "THE" answer in software, as it's always likely that someone can provide a better answer.)
I know some of you will be interested, but I also know that some of you would rather watch something rust. My goal is to help those who are interested and trick those who don't yet know their interested into giving it a try. After all, you can get started for less than your morning latte, but you may find an exciting new aspect of this hobby we all enjoy so much.
Regardless of the outcome, I sure appreciate Rich at least giving the idea a try.
Jack, W8TEE
On Thursday, May 13, 2021, 7:35:18 PM EDT, barry halterman < kthreebo@...> wrote:
Good information, if you know programming. I am just a dabbler and have limited skills in this area. Although, thanks for the info. Barry On Thu, May 13, 2021, 12:06 PM Dennis Zabawa < kg4rul@...> wrote: This was just an example to show that the 100PPR encoders can be made to work.? Anyone who cares to can feel free to incorporate Jack's suggestion and make the code into a library.
--
Jack, W8TEE
--
Jack, W8TEE
--
Jack, W8TEE
|
On 2021-05-14 19:35, Reed N wrote: Hi Jerry, Hi Reed, int enc_read(void) {
int ret_val = enc_count;
enc_count = 0;
return ret_val; That's exactly what I did. In addition, I toned down fastTune() by a factor of 20 or so. And I changed the minimum step size to ( I think ) 25Hz. - Jerry }
The 200ms thing you saw in the routine is only used for the momentum
parameter. Alternatively, you can adjust the momentum scale factors
(lines 116 and 119, currently 40 and 20's) to adjust the amount of
momentum.
There's also a scale factor applied to the tuning in menu_main.cpp at
line 104 [2]. Change the 50 to whatever frequency step size you'd
prefer. I don't think there's sub-Hz tuning capability right now,
since most frequency stuff uses integers, but that's not impossible
either, with sufficient will power :P
As for getting the behavior you described for your SB-34, it's
definitely possible to do that in software, but that's a bit more work
than just removing the momentum stuff in there right now.
Reed
Links:
------
[1]
[2]
[3] /g/BITX20/message/88358
[4] /mt/82833757/243852
[5] /g/BITX20/post
[6] /g/BITX20/editsub/243852
[7] /g/BITX20/leave/10189903/243852/952924773/xyzzy
|
All,
Well, I have a solution to the loud sidetone. Sort of. In cwKeydown() I replaced the call to
tone() with a call to analogWrite(). By specifying a really low value ( 1 ) , I was
able to get a CW sidetone I could live with - on the highest bands. On 80M, I could
hardly hear it at all. That's because on the lower bands, the natural gain of the radio
is higher, and so you turn the volume down.
I could put in logic to change the volume depending on the frequency. It would only need
two or three volumes - one for anything below 20M, the other 20M & up.
Changing the tone is a bit more complex. There is a setup register in the CPU that you
write to set the PWM frequency. But it's completely doable, without a whole lot of code. There are 1962 bytes left on the chip.
- Jerry KF6VB
toggle quoted message
Show quoted text
On 2021-05-14 19:10, jerry@... wrote: All,
The CW sidetone is extremely loud. Is it adjustable? Don't think
so. It comes out of an Arduino pin and is fed directly into the
receive audio chain just before the volume control. OK, is it
adjustable with software? Also no. It's produced by a call to
"tone()" which is part of the Arduino standard library. And tone()
can only do 50-percent duty cycle square waves. Otherwise, I would
have been able to adjust it in software by shortening the duty cycle.
There is a low-pass filter consisting of 3 resistors and 3 caps -
R252,R251,R250, C252,C251,C250. It should be possible to tame it by
increasing the value of R250.
Another possiblity - the CW sidetone is produced by pin D6. This is
a PWM ( Pulse Width Modulation ) pin. PWM works by varying the duty
cycle of the output pulse. Tone() is surely using the built-in PWM
functionality. I could just bypass tone() and use the PWM directly.
Shorter duty-cycle pulses SHOULD sound softer. And the lowpass audio
filter should make it not sound too horrible. I think.
- Jerry KF6VB
|
Hi Jerry,
The only function that should really need adjusting is . If you revise it to the below, it will be fully linear:
int enc_read(void) {
? int ret_val = enc_count;
? enc_count = 0;
? return ret_val;
}
The 200ms thing you saw in the routine is only used for the momentum parameter. Alternatively, you can adjust the momentum scale factors (lines 116 and 119, currently 40 and 20's) to adjust the amount of momentum.
There's also a scale factor applied to the tuning in . Change the 50 to whatever frequency step size you'd prefer. I don't think there's sub-Hz tuning capability right now, since most frequency stuff uses integers, but that's not impossible either, with sufficient will power :P
As for getting the behavior you described for your SB-34, it's definitely possible to do that in software, but that's a bit more work than just removing the momentum stuff in there right now.
Reed
|
Actually, yes, I can report that putting a 5k ppt in there (or a 10k divider) will drop side tone.
Ted
|
Re: Strange drop in sensitivity on V6
#ubitxv6
I understand exactly where you're coming from!
|
Raj vu2zap
Gerard
Ted