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
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Very interesting Jason! Tks!
Rafael
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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: 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
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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
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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
>
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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
>
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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
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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
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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
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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
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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
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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
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Re: Interesting QST article
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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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Re: Question: Why do you call "AGC" a simple automatic antenna "attenuator" in this forum?
#ubitx
#ubitxv6
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
>
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WARNING: Promotional material
All:
I just finished another pass through my Beginning C for Microcontrollers
book. The narrative of the book is virtually the same as previous
printings, but this one increases the font size from what appeared to be
an 8-point font to a 12-point font. I have also added a pretty
comprehensive book index with over 800 entries to make it more useful as
a reference book. Because of the larger font and the addition of a
14-page index, the page count has increased from 375 pages to about 475
pages, so the book's a little "fatter" now. I could post the index, but
since those pages numbers would be "way off" between this version and
earlier version, I'm not sure that does anyone much good. Anyway,
the bad news is that, evidently, I crossed some "printing threshold" as there was a significant
increase in the cost of producing the book. The good news is that the price remains
unchanged. If there are any questions, please use my SoftwareControlledHamRadio site to avoid using more bandwidth here.
Also, to those who wrote a review even with the crappy font...Thank you!
Jack, W8TEE
-- Jack, W8TEE
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Re: Interesting QST article
Simon
? Full circle. This all started with people modifying a QCX. It's great to see Hans supporting the hardware mod. Although, as he carefully notes, you will need firmware and support from the group.
You can also buy uSDX boards and parts from .
--
? 73
??? Bob? KD8CGH
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Re: Question: Why do you call "AGC" a simple automatic antenna "attenuator" in this forum?
#ubitx
#ubitxv6
Hi Curt and hi Gary ...
to be honest I'm not even a little angry, on the contrary I'm stimulated to try to learn something more (as Bill rightly says, the more I study the more I realize that I still need to learn something else!).
I agree with Curt for the excellent judgment he gives to the ?BITX, I own Version 6, but I believe that the judgment is applicable to all versions, especially I agree on the BF limiter that uses an LED and a photoresistor, it reminds me of a very old dynamic compressor circuit that I used 40/50 years ago on my HiFi to compress the dynamics of the Vinyl being recorded on magnetic tape.
I'm going crazy looking for the scheme among the old paperwork, there was a beautiful hardware solution that used an LED and a photostransistor (replaceable with a more convenient and less expensive photoresistor) stuck in a black plastic tube, if I find it again I scan it and I publish it, I will certainly remove the attenuator from the ?BITX and insert this solution !!!
For Gary, I conducted my experiments in 40m (band on which I love to do portable QSO) and the data collected refer to old HP and TEK instruments and perhaps they are a bit too penalizing, I used an HP8454B generator with HP11710B downconverter , an HP436A Bolometer with HP8481D head, a TEK2535 oscilloscope and a TEK2465B oscilloscope ... obviously, since the bolometer head is characterized only starting from 10MHz, it may be that it gave a slightly worse result than the real one, but not by a lot (half a point S counts for little against 2 or 3 points S) ... and to conclude I would say that to not blow the eardrums Curt's solution is definitely better than any other.
Finally, I feel like finding a way to realize a real good AGC to be inserted in the ?BITX, for example with an input amplifier MOSFET (perhaps with variable gain) driven by an AGC signal taken from the MF immediately after the quartz filter, I'm studying on ... if they are roses they will bloom.
a dear greeting ... IW4AJR Loris
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Mark Erbaugh
Bob Lunsford
Patrick Peter Rosney
N8DAH
Bob Benedict, KD8CGH