Re: Typo in ubitx_v6.1_code.ino?
Another question on the code. It seems like the radio does not save the CW state to EEPROM, just USB or LSB. Is this correct? In testing with my radio, I turned on CW and changed bands (so the frequency was saved to EEPROM) and did a power cycle, the CW state was not restored.
BTW, what triggers a save of frequency to EEPROM? If I use the tuning knob to adjust the frequency and power cycle, the frequency returns to what it was before I changed it.
I understand that due to the limited write cycles of the EEPROM, you don't want to be writing the frequency every time it changes. I also don't see a way to have the radio detect a shutdown as the power is abruptly turned off.
73,
Mark
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Re: Question: Why do you call "AGC" a simple automatic antenna "attenuator" in this forum?
#ubitx
#ubitxv6
Curt, I just tried two 1N914 type diodes connected anode-cathode and placed it across the earphone lines to ground. I tuned to a net where there were several hams with one really loud and the others weaker. The diode arrangement did help to the extent that while the loud station was still loud, it was not booming in my ears. If I had to guess, the signal in the headphones was about half what it was and it was livable. Therefore, it does help and I did not have to chase the volume control to keep the net comfortable as I did without the diodes.
The headphones were the common, 32 Ohm type.
I'd call it a clipper, a "leveler" or an equalizer but not an attenuator. Ha
It does not serve as a type of AGC but better if it is considered a crude safety device to help save the ears until something better comes along.
Bob ¡ª KK5R
On Wednesday, November 18, 2020, 8:30:24 PM EST, Curt via groups.io <wb8yyy@...> wrote:
Bob
I have seen that method used -- so give it a try if you have a pair of diodes handy.? I am trying to recall which rig I saw this used with.? silicon may work - but maybe some folk may use germanium or schottky - try what you have.?
At least with my v4, I am not hearing signals that would blast me out of the chair.? Its just a matter of 'enjoying tuning across the band.? If you have a photoresistor handy, then find an LED and a couple NPNs to try the circuit I recommend.? Otherwise, who knows see what the diodes will do.?
cool thing about the ubitx - 'have it your way' -- no reason not to be counter-culture.? forgive me for liking the dancing LED inside my ubitx case.? enjoy your listening and radiations.?
Curt
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I tried something a year ago or so. I was attempting to reduce the phase noise on Si5351 using an external oscillator instead of the internal oscillator. So, this is how it worked.? 1. You take a 10 MHz TCXO, (subsitute this with a GPS source for a GPSDO) and divide it by 2 in a 74HC74. The output is rich in harmonics at 5 MHz. 2. You feed the 5 MHz square wave into a triple tuned bandpass filter at 25 mhz to isolate the 5th harmonic. This will be weak, add an amplifier of 16 db to bring it up. 3. Feed this to the xin input of the Si5351. Now, your Si5351 is GPS disciplined.
On Thu 19 Nov, 2020, 7:35 AM Rafael Diniz, < rafael@...> wrote: Very interesting Jason! Tks!
Rafael
On 11/17/20 10:47 AM, Jason Pirok wrote:
> I just bought one of the VFO/SigGen kits from QRP-Labs and they
> already have a GPS disciplined option for it if you want to try it
> out. It is only 1PPS but apparently does the job. I haven't built my
> GPS kit yet so I can't give any personal details atm. You have to
> provide the 5v supply on your own so that is some extra work.
>
> Just a thought in case you hadn't seen that project yet.
>
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Re: Question: Why do you call "AGC" a simple automatic antenna "attenuator" in this forum?
#ubitx
#ubitxv6
Hi,
I have done and will be doing it again. When very loud signals suddenly appear in the cans, instead of making your ears bleed you will hear it suddenly very distorted and maybe a little louder. That is your cue to turn down the volume. It won't function like the AGC you are used to. It will protect your hearing.
73,
Bill KU8H
bark less - wag more
toggle quoted message
Show quoted text
On 11/18/20 7:56 PM, Bob Lunsford via groups.io wrote: For headphones, I wonder if two diodes with polarities reversed from each other across the headphone line would provide some hearing protection...? Or a pair of reversed polarity in series if the volume were affected too much. Does this cause severe distortion? (I've read about doing this but never tried it.)
By the way, what is "vogad"???
Bob ¡ª KK5R
On Wednesday, November 18, 2020, 7:38:16 PM EST, iz oos <and2oosiz2@...> wrote:
Loris, would you think a vogad at the audio output could be a solution to save both sensitivity and hears to some extent?
Il mer 18 nov 2020 06:10 PM Arv Evans <arvid.evans@... <mailto:arvid.evans@...>> ha scritto:
AAT (Automatic Attenuator Control)?
_._
On Wed, Nov 18, 2020 at 5:32 AM Bill Cromwell <wrcromwell@...
<mailto:wrcromwell@...>> wrote:
Hi Loris,
There are a lot of newbies here and they just don't know. Don't be
angry. Just help them alomng if they are actually open to help. I
started learning about physics and electronics in the early
1950s and I
still don't everything. I am more and moire aware of how much I
don't
know. I usually do know where to look:)
73,
Bill KU8H
bark less - wag more
On 11/18/20 7:17 AM, IW4AJR Loris wrote:
> Hi Bill ... I fully agree with you!
> What I am wondering is "why" this forum continues to call AGC
a very
> vulgar "ATTENUATOR" even if more or less automatic.
> 73 Loris
>
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Re: Typo in ubitx_v6.1_code.ino?
Reed,
Thanks. I new the gap under 256 was there for a reason, it just seemed odd that the numbering went from 257 to 358.
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Alternative Calibration Procedure uBITx v6
Following the calibration procedure for my v6, I had trouble zero beating a carrier, so I tried a modified approach that seems to work better for me. With the radio in LSB mode, I tuned 1 kHz above WWV at 5 MHz. WWV's carrier thus creates a 1 kHz tone. I used a program with an audio waterfall (I used FLDIGI) and adjusted the uBITx's tuning calibration until the tone was at 1 kHz.
73,
Mark
|
Very interesting Jason! Tks!
Rafael
toggle quoted message
Show quoted text
On 11/17/20 10:47 AM, Jason Pirok wrote: I just bought one of the VFO/SigGen kits from QRP-Labs and they
already have a GPS disciplined option for it if you want to try it
out. It is only 1PPS but apparently does the job. I haven't built my
GPS kit yet so I can't give any personal details atm. You have to
provide the 5v supply on your own so that is some extra work.
Just a thought in case you hadn't seen that project yet.
|
Re: Typo in ubitx_v6.1_code.ino?
Hi Mark,
The EEPROM storage addresses have histories. KD8CEC's software for v5 has a bunch of other features and settings, so the location of the keyer config made sense when it was added, but was left in place when ported for compatibility.
The master cal value could probably be limited, but since that value depends on the oscillator feeding the clock generator, unless you know the tolerance of that part, it's hard to say what the min/max should be. Especially since some home brew folks source different speeds.
Reed
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Re: Question: Why do you call "AGC" a simple automatic antenna "attenuator" in this forum?
#ubitx
#ubitxv6
Thanks Curt for your encouragement. I will try it soon and report to the group.
Bob ¡ª KK5R
On Wednesday, November 18, 2020, 8:30:24 PM EST, Curt via groups.io <wb8yyy@...> wrote:
Bob
I have seen that method used -- so give it a try if you have a pair of diodes handy.? I am trying to recall which rig I saw this used with.? silicon may work - but maybe some folk may use germanium or schottky - try what you have.?
At least with my v4, I am not hearing signals that would blast me out of the chair.? Its just a matter of 'enjoying tuning across the band.? If you have a photoresistor handy, then find an LED and a couple NPNs to try the circuit I recommend.? Otherwise, who knows see what the diodes will do.?
cool thing about the ubitx - 'have it your way' -- no reason not to be counter-culture.? forgive me for liking the dancing LED inside my ubitx case.? enjoy your listening and radiations.?
Curt
|
Re: Question: Why do you call "AGC" a simple automatic antenna "attenuator" in this forum?
#ubitx
#ubitxv6
Bob
I have seen that method used -- so give it a try if you have a pair of diodes handy.? I am trying to recall which rig I saw this used with.? silicon may work - but maybe some folk may use germanium or schottky - try what you have.?
At least with my v4, I am not hearing signals that would blast me out of the chair.? Its just a matter of 'enjoying tuning across the band.? If you have a photoresistor handy, then find an LED and a couple NPNs to try the circuit I recommend.? Otherwise, who knows see what the diodes will do.?
cool thing about the ubitx - 'have it your way' -- no reason not to be counter-culture.? forgive me for liking the dancing LED inside my ubitx case.? enjoy your listening and radiations.?
Curt
|
Re: Question: Why do you call "AGC" a simple automatic antenna "attenuator" in this forum?
#ubitx
#ubitxv6
For headphones, I wonder if two diodes with polarities reversed from each other across the headphone line would provide some hearing protection...? Or a pair of reversed polarity in series if the volume were affected too much. Does this cause severe distortion? (I've read about doing this but never tried it.)
By the way, what is "vogad"???
Bob ¡ª KK5R
On Wednesday, November 18, 2020, 7:38:16 PM EST, iz oos <and2oosiz2@...> wrote:
Loris, would you think a vogad at the audio output could be a solution to save both sensitivity and hears to some extent?
AAT (Automatic Attenuator Control)? _._
Hi Loris,
There are a lot of newbies here and they just don't know. Don't be
angry. Just help them alomng if they are actually open to help. I
started learning about physics and electronics in the early 1950s and I
still don't everything. I am more and moire aware of how much I don't
know. I usually do know where to look:)
73,
Bill KU8H
bark less - wag more
On 11/18/20 7:17 AM, IW4AJR Loris wrote:
> Hi Bill ... I fully agree with you!
> What I am wondering is "why" this forum continues to call AGC a very
> vulgar "ATTENUATOR" even if more or less automatic.
> 73 Loris
>
|
Re: Question: Why do you call "AGC" a simple automatic antenna "attenuator" in this forum?
#ubitx
#ubitxv6
Loris, would you think a vogad at the audio output could be a solution to save both sensitivity and hears to some extent?
AAT (Automatic Attenuator Control)? _._
Hi Loris,
There are a lot of newbies here and they just don't know. Don't be
angry. Just help them alomng if they are actually open to help. I
started learning about physics and electronics in the early 1950s and I
still don't everything. I am more and moire aware of how much I don't
know. I usually do know where to look:)
73,
Bill KU8H
bark less - wag more
On 11/18/20 7:17 AM, IW4AJR Loris wrote:
> Hi Bill ... I fully agree with you!
> What I am wondering is "why" this forum continues to call AGC a very
> vulgar "ATTENUATOR" even if more or less automatic.
> 73 Loris
>
|
Re: #For Sale A Few QRP Goodies
#for
Tambem falo portugues. Era liinguist em ASA.
Bob ¡ª KK5R
On Wednesday, November 18, 2020, 3:15:15 PM EST, N8DAH <dherron@...> wrote:
Rubens,
Simplesmente n?o tenho tempo para brincar com tudo como pensei que faria. Tamb¨¦m estou reduzindo um pouco o barraco e adoro construir coisas.
73
--
David
?N8DAH
|
Re: Typo in ubitx_v6.1_code.ino?
As a follow up, as I read the code, it appears the parameters for LSB_CAL and SIDE_TONE stored in the EEPROM are not used in the version 6 code. SIDE_TONE is at location 12. There is a CW_SIDETONE at location 24 that is used.
Also, in the code, I see that there are range checks for most of the parameters to check if the EEPROM has reasonable values, but I can't find a range check for the MASTER_CAL. What is an appropriate range of values for MASTER_CAL?
73,
Mark
|
Will do , Evan? and Thanks Again for all the help and useful information you gave me .?
73 and stay safe?
On Wed, Nov 18, 2020 at 11:53 PM Evan Hand < elhandjr@...> wrote: Patrick,
I am very happy that you were able to get your uBITX working.? The knowledge of helping someone really makes my day.
Have fun and feel free to post any questions that may come up.
Enjoy the uBITX!
73
Evan
AC9TU
|
Patrick,
I am very happy that you were able to get your uBITX working.? The knowledge of helping someone really makes my day.
Have fun and feel free to post any questions that may come up.
Enjoy the uBITX!
73
Evan
AC9TU
|
AC9TU ..EVAN?
Hi Evan , Thank You so Much for your last reply . I got stuck into this XLoader debacle today . I downloaded an older version?of it ( V 1.0 ) and put that onto? an older Laptop I have here which runs off Windows 8 .? I was downloading? V1.332 on the other Laptops but it wasnt? working .? The second I downloaded XLoader V 1.00 it worked a treat . I then downloaded the uBitx Firmware , the exact version You sent the link for . Only for You telling me the Exact? Hex File I would?have been totally lost ...again !? ? Eventually uploaded all onto the Nano Board and when I powered up the Radio ...CW was coming out of the Speaker at full volume ! Success ...I can hear loads of signals now and the Radio seems to work ...I suspect I need to fine tune it a little? but I have something to start with now once I can hear signals .
Thanks Again for Your Help , Evan ...at long last after a lot of? trial and error I have this uBitx V4.3? working and receiving ...this is what I love about Amateur Radio , everybody helps one? another and there is always somebody out there who can answer a question or solve a problem ... If You ever come and visit Ireland , I owe? You a Pint ( or maybe 2? )? of Guinness? for your help ! Thanks Evan? 73 and Chat soon?
On Sun, Nov 15, 2020 at 9:12 AM Evan Hand < elhandjr@...> wrote: On Sat, Nov 14, 2020 at 04:58 PM, Patrick Peter Rosney wrote:
I uploaded V5 Firmware but this has made no difference
Patrick,
The v5 firmware uses a different SSB filter frequency.? That software will not work with a v4 board.? Here is a link to the KD8CEC software that has both the v4 and v5 board software.?
You want to use the uBITXV234 folder selecting the file that matches your display.? If it is the stock v4 1602 display then the file is?UBITX_CEC_V1.200_16P.hex.?The hex files are loaded into the Nano with Xloader.
If you want to go back to the stock v4 software, here is the link:
I would suggest the KD8CEC software, as that has more features and options for CW operation that the stock does not.
Once you have the correct software I would then start the troubleshooting as Jerry suggested.
Have fun with the rig.
73
Evan
AC9TU
|
Typo in ubitx_v6.1_code.ino?
Around line 177 in the ubitx_v6.1_code.ino, the address of the CW_KEY_TYPE parameter in EEPROM is set at 358. The previous parameters (VFO_A_MODE and VFO_B_MODE) are? at 256 and 257 respectively. Should CW_KEY_TYPE be at 258 instead of 358? I guess it doesn't matter, except that the data is not continuous with the previous data. I understand the reason for the gap from CW_DELAYTIME at 48 and VFO_A_MODE at 256.
Mark
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Re: #For Sale A Few QRP Goodies
#for
Rubens,
Simplesmente n?o tenho tempo para brincar com tudo como pensei que faria. Tamb¨¦m estou reduzindo um pouco o barraco e adoro construir coisas.
73
--
David
?N8DAH
|
Re: Interesting QST article
toggle quoted message
Show quoted text
On Wed, Nov 18, 2020 at 3:15 AM Bob Benedict, KD8CGH < rkayakr@...> wrote: The uSDX is a development effort that has several evolving designs, it's not a single product like the uBITX V6. One cool aspect of it is that it uses a highly efficient class E amp not only for CW, but for other modes too. It pulls off this wizardry by pulse width modulating the power to the amp. It's a uses direct conversion SDR receiver with the rest of the signal processing done computationally. The amazing thing is that all of this, including A/D and D/A, is all done by an Arduino so there is a very low discrete parts count.
It started single band as a modification of QRP Labs QCX class E amp CW transceiver. The two main design streams now have multiband filter boards.?
Check out the uSDX WIKI for an overview.
I built a uBITX V4, a WB2CBA uSDX and I'm slowly building a DL2MAN version uSDX (I'm not so good with SMD). In my opinion, compared to the uBITX, the uSDX has more features like AGC and variable filters. It's better at CW since it's QSK and has filters you can narrow, but the SSB transmission is not as good. The uSDX firmware is evolving rapidly, like in the early uBITX days,? so we'll see how it progresses.
BTW Farahan often participates in uSDX discussions. I wouldn't be surprised to see a new transceiver from HF Signals.
--
? 73
??? Bob? KD8CGH
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Mark Erbaugh
Bob Lunsford
Patrick Peter Rosney
N8DAH