Re: ubitx 6.2 bench calibration frequencies?
John
Once you go through the math you will see these numbers relate to hardware, and that the controller code has appropriate default values.
BFO calibration addresses variation in the quartz crystals,? so calibration must exercise the receive chain. It can be done decently by ear, and verified by listening to both sidebands of an AM signal. Or using an audio FFT analyzer. Look here and on the web for methods. BFO calibration is vital to good reception.
Curt
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Re: ubitx 6.2 bench calibration frequencies?
Hi John,
Assuming you're using the stock v6 software 6.1, then you'll see the first IF is set to 45.005MHz
The usbCarrier defaults to 11.052MHz, but is whatever your BFO calibration is set to
Finally, the frequency of clk1 is set to the sum of those two for USB, so in the default case, 45.005+11.052=46.057
Clk0 is a bit easier: it should just be whatever the BFO is calibrated to be. So again for default, that would be 11.052MHz, but if your rig already has a calibration, then it should match the frequency of that calibration.
I don't know exactly what your BFO is calibrated to, so I can't tell you exactly what frequencies to expect. However, a reading of? 33.95 MHz on LSB mode would imply a BFO calibration of 11.055 MHz, which is in line with what I'd expect. Do you have reason to believe your radio is incorrectly tuned?
Reed
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Ron - The Teensy has the code space for such luxuries :P
Guy - most of the stuff I added was already in other software builds for earlier or hardware modified versions. If you haven't already tried KD8CEC's software on your pre-6 rig, you might give it a go.
Reed
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I'm sure many here know about this but just in case....
QRP Guys offers a tilt bail kit that is composed of four items that will allow your radio to be tilted up (enough for two radios) and sure looks like a good way to make your radio easier to see/operate.
QRPGuys Four Retractable Chassis Tilt Bails ¨C $15
Bob ¡ª KK5R
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On the Teensy I made it a menu item, do not believe in "defines"!
On Saturday, July 18, 2020, 12:04:59 AM EDT, Reed N <greenkid336600+groupsio@...> wrote:
Ron,
I don't think it would be too difficult to modify for v5 (or even earlier). But unlike the KD8CEC software, I haven't set up nice #define switches to change between versions.
Reed
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Thanks Reed. Makes me almost want to get a V6 just to use your software. Seems to have a lot of great features.
73,
Guy WB7SZI?
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Ron,
I don't think it would be too difficult to modify for v5 (or even earlier). But unlike the KD8CEC software, I haven't set up nice #define switches to change between versions.
Reed
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Great write up! Thanks for sharing your setup and design decisions so clearly.
Reed
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Hi Bob
I love my ubitx radios and get out well with it and receive is as good as my other radios. In a situation you want to use what you have.?
Of course you know that in an emergency, you want a decent 2 meter FM rig. Unlikely I would be able to effect any change in an emergency out on the east coast, from 1000 miles away.?
You might be better served if you have something like an all band transceiver.
--
73
Dave
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Re: ubitx 6.2 bench calibration frequencies?
Pl rethink . Clk 0 is not 11. But 11.0555 odd.? Regards Sarma vu3zmv
On Sat, 18 Jul 2020, 9:06 am John Sutter, < jds@...> wrote: What should the CLK0 and CLK1 frequencies be?
?From what I read,
CLK0 should be 11 MHz
CLK1 should be 57 and 33 MHz for LSB and USB respectively.
I connect my Agilent counter to CLK1 and am getting 33.95 MHz.
If I need to get it down to 33.0 MHz, I'll be spinning that knob for a
15 to 20 minutes.
John
K6JDS
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ubitx 6.2 bench calibration frequencies?
What should the CLK0 and CLK1 frequencies be?
From what I read,
CLK0 should be 11 MHz
CLK1 should be 57 and 33 MHz for LSB and USB respectively.
I connect my Agilent counter to CLK1 and am getting 33.95 MHz.
If I need to get it down to 33.0 MHz, I'll be spinning that knob for a 15 to 20 minutes.
John
K6JDS
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Wonderful. A new direction for many of us. Great Job. 73
VU2SPF SP Bhatnagar
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Hi Reed
? If one with V5 or earlier wanted to add the tft display would it not be easy to change the filter offset so your software would work?
rOn
On Friday, July 17, 2020, 10:21:36 PM EDT, Reed N <greenkid336600+groupsio@...> wrote:
Curt,
The stock v6 software offsets CW transmit from the displayed frequency by the tone setting. It's a known issue.
Reed
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Curt,
The stock v6 software offsets CW transmit from the displayed frequency by the tone setting. It's a known issue.
Reed
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Hi Guy,
My software assumes you have a v6 with the ILI touch screen. If you have a v5 or earlier, I'd recommend the KD8CDC + nextion route.
Reed
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Hi, I¡¯m just concerned about the idea of an emergency team using a QRP transceiver for communications. Can you explain a little more about that? ?Our experiences during formal exercises Involving multiple teams over several years in Florida suggests that if you need distance communications, not only do you need more power but you need significantly good antennas.
You could get around some of that by using JS8 but I would suggest some form of extra lamp a fire if you need to go more than just local within one city ? ?
I may however completely misunderstand your usage requirements, so fill me in on exactly what your missions will be
Thanks? Gordon Gibby KX4Z
toggle quoted message
Show quoted text
On Jul 17, 2020, at 20:11, Bob Lunsford via groups.io <nocrud222@...> wrote:
?
I recommend the complete kit since it is quick, compact enough and leaves space for any little add-on projects. I plan to use mine mostly mobile for the challenge and for monitoring AM broadcast and for SW listening. I also got an adapter for putting on the BNC antenna connector to converting to an SO-239.
I sent mine to Michigan where a friend aligned it after I thought it needed to be aligned and then found I did not have the setup needed to put it back in specification. As it is, when you order yours, alignment is not normally required since it has been done already at the factory. I will get mine back tomorrow from the Post Office and then the fun begins.
Many have changed the microphone but do what I did, transmit with the V6 into a dummy load and receive on the home rig with the input shorted. Most change-over switches do this automatically and it's to make sure the home rig is not overloaded. I used headphones and it appeared to be working well with the provided microphone. However, some recommend a common CB microphone, with and without amplification, where the transmit audio needs to be improved. Those microphones can be had at flea markets or even pawn shops and I got one (somewhere) here that I picked up for $10 but never used it. I'll have to change the connector, probably, so hope the provided microphone will perform adequately. I can do a connector changeover but would rather not do it if it is not really needed.
I have used many QRP radios in the past so it's not the radio that will do the job by itself. It has to be used with a good/decent antenna, also. If the antenna is not a performer, you will not be happy, regardless of the radio. Just make sure the SWR is no more than 3:1 and, better yet, 2:1 and under for the radio to really work well.
Mobile antennas are normally by design of limited performance. Better results is when you go to a hilltop or a park and put up a 40M dipole, for example, but many get good results from a 40M end fed dipole because if it's done right, the antenna will work on higher bands, also. A good little antenna turner will be a good thing to have, also. Some cost less than $50 and are good investments.
Hope to hear success stories from you in the future on getting the radio and using it.
Bob ¡ª KK5R
On Friday, July 17, 2020, 7:05:55 PM EDT, Bob, N1KPR <rwbetts@...> wrote:
Thanks to all that responded. I didn't realize there was a QST review. So went to the archives and got it. I'll read it tonight, but from what I already see, and what Bob had to say about its operation, I think I'll be ordering the radios and all the ancillary parts tomorrow. This will be a fun project and I'll keep everyone posted. Many thanks, Bob, N1KPR
NOTE Pls add backup address to your phone book: rwbetts@...
http://www.bobsamerica.com? http://www.youtube.com/n1kpr
Engineering: Where Enigma meets Paradox
On Friday, July 17, 2020, 4:46:16 PM EDT, Bob Lunsford via groups.io <nocrud222@...> wrote:
The review in QST was for a V5 but it is essentially the same as V6 for the Receive/Transmit specifications. With the V6 there are no doubt some improvements and many users have incorporated some? favorite enhancements of their own. However, the V6 Complete Kit has the cabinet and it's a plug-n-chug kit much like the Elecraft QRP kits. No soldering is required, for example, and if one is careful in assembly, it a working rig right out of the box and into the box, so to speak. Heathkit never had it so good.
What you will notice is that the signals seem to jump out at you. If band conditions are quiet, it's one of the quietest receiver you will ever hear, especially of the home-built QRP kits. Sensitivity is great and compares with radios costing hundreds of dollars more. Received transmissions are generally good if not great and many are surprised that such a small radio at that price produces such a good/great transmitted signal.
The issue where the V5 is reviewed is the September, 2019 issue, starting on page 42.
The V6 will no doubt have a follow-up review in the next year so look forward for that, also.
Bob ¡ª KK5R
On Friday, July 17, 2020, 1:15:23 PM EDT, Ashhar Farhan <farhanbox@...> wrote:
There was an arrl review that was quite objective. - f On Fri 17 Jul, 2020, 10:23 PM Bob, N1KPR, < rwbetts@...> wrote: Before we get too deep into this project for our emergency team who will be using 3 or 4 uBITX V6 xcievers, I'd love any comments,
My final question (I think) concerns the receiver portion of the system. I can't seem to find any specs on the receive mode, IE; MDS (-127dB min), sensitivity, IP3, etc. Maybe I missed something in the files section, and this has already been posted, but any help with that would be of great use to me before investing in all the bits and pieces.
Thank you,
es73, Bob, N1KPR
|
Re: FS: uBitx v5 w/3D printed case and AGC board
#v5
#ubitx
Wes, I sent a PM but not sure if you got it. In any event I already have one of the MFJ pocket morse thingys I got in a trade a while back.
Anybody have something interesting to swap for the v5?
73,
K4DSP
|
I recommend the complete kit since it is quick, compact enough and leaves space for any little add-on projects. I plan to use mine mostly mobile for the challenge and for monitoring AM broadcast and for SW listening. I also got an adapter for putting on the BNC antenna connector to converting to an SO-239.
I sent mine to Michigan where a friend aligned it after I thought it needed to be aligned and then found I did not have the setup needed to put it back in specification. As it is, when you order yours, alignment is not normally required since it has been done already at the factory. I will get mine back tomorrow from the Post Office and then the fun begins.
Many have changed the microphone but do what I did, transmit with the V6 into a dummy load and receive on the home rig with the input shorted. Most change-over switches do this automatically and it's to make sure the home rig is not overloaded. I used headphones and it appeared to be working well with the provided microphone. However, some recommend a common CB microphone, with and without amplification, where the transmit audio needs to be improved. Those microphones can be had at flea markets or even pawn shops and I got one (somewhere) here that I picked up for $10 but never used it. I'll have to change the connector, probably, so hope the provided microphone will perform adequately. I can do a connector changeover but would rather not do it if it is not really needed.
I have used many QRP radios in the past so it's not the radio that will do the job by itself. It has to be used with a good/decent antenna, also. If the antenna is not a performer, you will not be happy, regardless of the radio. Just make sure the SWR is no more than 3:1 and, better yet, 2:1 and under for the radio to really work well.
Mobile antennas are normally by design of limited performance. Better results is when you go to a hilltop or a park and put up a 40M dipole, for example, but many get good results from a 40M end fed dipole because if it's done right, the antenna will work on higher bands, also. A good little antenna turner will be a good thing to have, also. Some cost less than $50 and are good investments.
Hope to hear success stories from you in the future on getting the radio and using it.
Bob ¡ª KK5R
On Friday, July 17, 2020, 7:05:55 PM EDT, Bob, N1KPR <rwbetts@...> wrote:
Thanks to all that responded. I didn't realize there was a QST review. So went to the archives and got it. I'll read it tonight, but from what I already see, and what Bob had to say about its operation, I think I'll be ordering the radios and all the ancillary parts tomorrow. This will be a fun project and I'll keep everyone posted. Many thanks, Bob, N1KPR
NOTE Pls add backup address to your phone book: rwbetts@...
http://www.bobsamerica.com? http://www.youtube.com/n1kpr
Engineering: Where Enigma meets Paradox
On Friday, July 17, 2020, 4:46:16 PM EDT, Bob Lunsford via groups.io <nocrud222@...> wrote:
The review in QST was for a V5 but it is essentially the same as V6 for the Receive/Transmit specifications. With the V6 there are no doubt some improvements and many users have incorporated some? favorite enhancements of their own. However, the V6 Complete Kit has the cabinet and it's a plug-n-chug kit much like the Elecraft QRP kits. No soldering is required, for example, and if one is careful in assembly, it a working rig right out of the box and into the box, so to speak. Heathkit never had it so good.
What you will notice is that the signals seem to jump out at you. If band conditions are quiet, it's one of the quietest receiver you will ever hear, especially of the home-built QRP kits. Sensitivity is great and compares with radios costing hundreds of dollars more. Received transmissions are generally good if not great and many are surprised that such a small radio at that price produces such a good/great transmitted signal.
The issue where the V5 is reviewed is the September, 2019 issue, starting on page 42.
The V6 will no doubt have a follow-up review in the next year so look forward for that, also.
Bob ¡ª KK5R
On Friday, July 17, 2020, 1:15:23 PM EDT, Ashhar Farhan <farhanbox@...> wrote:
There was an arrl review that was quite objective. - f
On Fri 17 Jul, 2020, 10:23 PM Bob, N1KPR, < rwbetts@...> wrote: Before we get too deep into this project for our emergency team who will be using 3 or 4 uBITX V6 xcievers, I'd love any comments,
My final question (I think) concerns the receiver portion of the system. I can't seem to find any specs on the receive mode, IE; MDS (-127dB min), sensitivity, IP3, etc. Maybe I missed something in the files section, and this has already been posted, but any help with that would be of great use to me before investing in all the bits and pieces.
Thank you,
es73, Bob, N1KPR
|
Thanks to all that responded. I didn't realize there was a QST review. So went to the archives and got it. I'll read it tonight, but from what I already see, and what Bob had to say about its operation, I think I'll be ordering the radios and all the ancillary parts tomorrow. This will be a fun project and I'll keep everyone posted. Many thanks, Bob, N1KPR
NOTE Pls add backup address to your phone book: rwbetts@...
http://www.bobsamerica.com? http://www.youtube.com/n1kpr
Engineering: Where Enigma meets Paradox
On Friday, July 17, 2020, 4:46:16 PM EDT, Bob Lunsford via groups.io <nocrud222@...> wrote:
The review in QST was for a V5 but it is essentially the same as V6 for the Receive/Transmit specifications. With the V6 there are no doubt some improvements and many users have incorporated some? favorite enhancements of their own. However, the V6 Complete Kit has the cabinet and it's a plug-n-chug kit much like the Elecraft QRP kits. No soldering is required, for example, and if one is careful in assembly, it a working rig right out of the box and into the box, so to speak. Heathkit never had it so good.
What you will notice is that the signals seem to jump out at you. If band conditions are quiet, it's one of the quietest receiver you will ever hear, especially of the home-built QRP kits. Sensitivity is great and compares with radios costing hundreds of dollars more. Received transmissions are generally good if not great and many are surprised that such a small radio at that price produces such a good/great transmitted signal.
The issue where the V5 is reviewed is the September, 2019 issue, starting on page 42.
The V6 will no doubt have a follow-up review in the next year so look forward for that, also.
Bob ¡ª KK5R
On Friday, July 17, 2020, 1:15:23 PM EDT, Ashhar Farhan <farhanbox@...> wrote:
There was an arrl review that was quite objective. - f
On Fri 17 Jul, 2020, 10:23 PM Bob, N1KPR, < rwbetts@...> wrote: Before we get too deep into this project for our emergency team who will be using 3 or 4 uBITX V6 xcievers, I'd love any comments,
My final question (I think) concerns the receiver portion of the system. I can't seem to find any specs on the receive mode, IE; MDS (-127dB min), sensitivity, IP3, etc. Maybe I missed something in the files section, and this has already been posted, but any help with that would be of great use to me before investing in all the bits and pieces.
Thank you,
es73, Bob, N1KPR
|
The review in QST was for a V5 but it is essentially the same as V6 for the Receive/Transmit specifications. With the V6 there are no doubt some improvements and many users have incorporated some? favorite enhancements of their own. However, the V6 Complete Kit has the cabinet and it's a plug-n-chug kit much like the Elecraft QRP kits. No soldering is required, for example, and if one is careful in assembly, it a working rig right out of the box and into the box, so to speak. Heathkit never had it so good.
What you will notice is that the signals seem to jump out at you. If band conditions are quiet, it's one of the quietest receiver you will ever hear, especially of the home-built QRP kits. Sensitivity is great and compares with radios costing hundreds of dollars more. Received transmissions are generally good if not great and many are surprised that such a small radio at that price produces such a good/great transmitted signal.
The issue where the V5 is reviewed is the September, 2019 issue, starting on page 42.
The V6 will no doubt have a follow-up review in the next year so look forward for that, also.
Bob ¡ª KK5R
On Friday, July 17, 2020, 1:15:23 PM EDT, Ashhar Farhan <farhanbox@...> wrote:
There was an arrl review that was quite objective. - f
On Fri 17 Jul, 2020, 10:23 PM Bob, N1KPR, < rwbetts@...> wrote: Before we get too deep into this project for our emergency team who will be using 3 or 4 uBITX V6 xcievers, I'd love any comments,
My final question (I think) concerns the receiver portion of the system. I can't seem to find any specs on the receive mode, IE; MDS (-127dB min), sensitivity, IP3, etc. Maybe I missed something in the files section, and this has already been posted, but any help with that would be of great use to me before investing in all the bits and pieces.
Thank you,
es73, Bob, N1KPR
|
Bob Lunsford
_Dave_ AD0B
SP Bhatnagar
Bob, N1KPR