Re: Need Clarification on uBitx v. 4 Schematic
I believe Ashhar is using the RD15HV IN rV4 . he ha done major mods, A complete descrete direct coupled audio amplifier circuit, a pop eliminator, an AGC , Lots of stuff. He claimed it was a dollars worth of parts, but, the board is a massive change. The Finals section in the schematic is very confusing and looks like a direct coupled Mosfet circuit, but that's probably not the case. Hopefully he's reading this , I printed the schematic 10x17 today and the changes stood out like a "western sore thumb" . Very tempting to have a second board.?
On Thu, May 31, 2018 at 2:46 PM, Mike <msmith@...> wrote: Thanks for the replies . . .?I figured they were meant to be options. May be better just to provide a text-box footnote in?schematic.
I've made dozens of FT8 contacts with a scratch built ubitx(V3) using the 510's, typically 10W PEP,? minimal heatsink, no fan, no?enclosure?. . . . the 510's?are actually quite rugged, stable, and predictable.
It's part of what makes it a fun build - they're cheap to replace when you drive them into oscillation and then *poof* !
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Re: What does zero-beat sound like?
#ubitx
Nice to know. On the other hand when you do install and it matches your assesment you may want to consider adding 'theroactual' to the dictionary.?
On Thu, May 31, 2018, 5:51 PM Dexter N Muir < dexy@...> wrote: More from the thinkery, Mike:
TP20 should give a good meter point. There's a 0.1uF to earth there, but at low freq and Z its Z won't affect much.
..and theoretical, 'cos I don't actually have one: stalled with bitx-40 and horrific QRM at the QTH :( .
73
Dex, ZL2DEX
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Re: boosting the power on 28 MHz
#ubitx
I always heard that 6 meters was the 'magic band' for the same reason.?
I hate that band because of the way it works.? I usually set up a 6 meter station for field day as it is sort of an extra points station..? Remember a few years ago that the band was wide open and about 5 minutes after the start of the contest it closed.??
ku4pt
On Thu, May 31, 2018 at 6:01 PM, atouk <atouk@...> wrote:
On 5/31/2018 4:53 PM, Richard Spohn
wrote:
It's all due to marketing! 10 meters is called the "Magic Band". And
everybody loves magic. - Rich WB2GXM
On 5/30/18, Bo Barry <bobarr@...> wrote:
I'm constantly surprised at the interest in 10 meters. I always check 15. If
its dead I go to 20. If it has anything on it I check 10 and hear nothing
here in NC with a simple EFHW..
But 10 was a blast back in 1954!!? ?:)
73, Bo W4GHV since '54
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Re: What does zero-beat sound like?
#ubitx
The tuning is close for those that do not have test equipment.
What I usually do is set a sideband rig readout either 1000 hz higher or lower than the desired frequency depending on the sideband .? Then feed it a signal that is on frequency and put a counter on the speaker.? When the speaker output is 1000 hz, then the receiver is set.? No guessing about trying to hear the zero beat below around 100 hz or less.
While I bought used test equipment and do not have that much in it, here I set with a $ 120 rig and use about? $ 5000 worth of test equipment to set it with. Would have been much less expensive to buy a transceiver already to go..But I would not have nearly as much fun working with this little rig.?
As I see it, Mr. Farhan did an excellent job of making an inexpensive rig for those that can not afford a more expensive rig, and for those of us that like to tinker with items that we do not have the skill or way to make the circuit boards and such from scratch.? + de ku4pt
On Thu, May 31, 2018 at 5:11 PM, Mike aka KC2WVB <rb5363@...> wrote: OK, I thought about this can of worms I opened on the ride home. Given the stores are 60 miles from the mountain top home I am staying at this summer I had roughly 45 minutes to sort through the various responses.
First, we should agree that the metric that establishes the accuracy one is aiming for is wave? lenght. Wave length of course is the distance propagated in one complete cycle. So Jerry is correct in that if your aim is to set an oscillator at a set frequency then being off by as much as 300 hz when using? a 30 MHz signal as a reference is equivalent to being off by 10 hz when using a 1 Mhz signal as a? reference. This is due to 10 cycles at 1Mhz and 300 cycles at 30 Mhz, when viewed as occupying distance, are equal in lenght.
If I have bad hearing it is normally at the low or high end of the spectrum and what Jerry pointed out shows that I can still obtain the accuracy of someone with better hearing by using a higher frequency for a reference signal and if our hearing is equivalent then I simply obtain higher accuracy by using the higher frequency reference signal.
As the other gentleman pointed out being able to have accuracy that resolves to perfection is most likely not even possible because of capacitor issues that end up blocking or at least attenuating the lowest of the lows in terms of audio signals.
However, I do disagree with defining theoretical so as to indicate other than actual conditions for while the theoretical and actual may not coincide there are times that they do.
Thank you all for chipping in to this discussion brought on by my thinking out loud. Its been interesting. _._,_._,_
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Re: What does zero-beat sound like?
#ubitx
I tried the "official" calibration routine, but turned out to be VERY rough.
Two reasons for this:
a) Zero beating with loudspeaker or earphones requires that these two transducers can reproduce split-Hz tones, plus your ears can detect them.
b) The offered by the firmware calibration values are very wide.
?
What did I do after this:
1) Selected by ear two calibration values that sounded as the "best" pair in regards to zero beating.
2) Used them both and the WSJT-x software, in calibration mode, to find the two offsets (one positive the other negative if you have done a good zero beating job)
3) With the aid of the CEC manager, read the internal long calibration parameter for both cases.
4) Interpolated parameters of 3) with offsets from 2) and wrote (i.e. programmed) the new value a bit rounded, as it doesn't make any sense to seek more accuracy that the master clock's stability allows.
?
73 Nikos
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Re: boosting the power on 28 MHz
#ubitx
What no 17 meters? I heard some signals the other day coming in and they may have been from Japan. I¡¯m keeping an eye on 17 this summer. 15 meters too. ? I already looked Poland and Brazil on 15.
Joe
KD2NFC
toggle quoted message
Show quoted text
On May 31, 2018, at 4:53 PM, Richard Spohn <wb2gxm@...> wrote:
It's all due to marketing! 10 meters is called the "Magic Band". And
everybody loves magic. - Rich WB2GXM
On 5/30/18, Bo Barry <bobarr@...> wrote:
I'm constantly surprised at the interest in 10 meters. I always check 15. If
its dead I go to 20. If it has anything on it I check 10 and hear nothing
here in NC with a simple EFHW..
But 10 was a blast back in 1954!! :)
73, Bo W4GHV since '54
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Re: boosting the power on 28 MHz
#ubitx
Like Bob Heil said. If everybody TRANSMITTED on 10m, then you may hear someone. <sic>. ? Kent ?
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Show quoted text
From: [email protected] <[email protected]> On Behalf Of atouk
Sent: Thursday, May 31, 2018 6:01 PM
To: [email protected]
Subject: Re: [BITX20] boosting the power on 28 MHz #ubitx? ? 
On 5/31/2018 4:53 PM, Richard Spohn wrote: It's all due to marketing!? 10 meters is called the "Magic Band".? And everybody loves magic. - Rich WB2GXM ? On 5/30/18, Bo Barry <bobarr@...> wrote: I'm constantly surprised at the interest in 10 meters. I always check 15. If its dead I go to 20. If it has anything on it I check 10 and hear nothing here in NC with a simple EFHW.. ? But 10 was a blast back in 1954!!? ?:) ? 73, Bo W4GHV since '54 ?
? ? ?
?
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Re: boosting the power on 28 MHz
#ubitx
On 5/31/2018 4:53 PM, Richard Spohn
wrote:
toggle quoted message
Show quoted text
It's all due to marketing! 10 meters is called the "Magic Band". And
everybody loves magic. - Rich WB2GXM
On 5/30/18, Bo Barry <bobarr@...> wrote:
I'm constantly surprised at the interest in 10 meters. I always check 15. If
its dead I go to 20. If it has anything on it I check 10 and hear nothing
here in NC with a simple EFHW..
But 10 was a blast back in 1954!!? ?:)
73, Bo W4GHV since '54
|
Re: What does zero-beat sound like?
#ubitx
More from the thinkery, Mike:
TP20 should give a good meter point. There's a 0.1uF to earth there, but at low freq and Z its Z won't affect much.
..and theoretical, 'cos I don't actually have one: stalled with bitx-40 and horrific QRM at the QTH :( .
73
Dex, ZL2DEX
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The actual assembly is the same so just follow the wire up link at hfsignals.?http://www.hfsignals.com/index.php/ubitx-wire-up/
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Re: Need Clarification on uBitx v. 4 Schematic
Thanks for the replies . . .?I figured they were meant to be options. May be better just to provide a text-box footnote in?schematic.
I've made dozens of FT8 contacts with a scratch built ubitx(V3) using the 510's, typically 10W PEP,? minimal heatsink, no fan, no?enclosure?. . . . the 510's?are actually quite rugged, stable, and predictable.
It's part of what makes it a fun build - they're cheap to replace when you drive them into oscillation and then *poof* !
|
My archived copy is here.??
Ron W7HD
On 05/31/2018 12:50 PM, Kevin Timm
wrote:
The
archived assembly instructions are here:??
I can't find any assembly instructions there
K5KDT
Kevin
--
Ron W7HD - NAQCC#7587 OMISS#9898 KX3#6966 LinuxUser#415320
Editor OVARC newsletter
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Ian, correct me if I am wrong, is saying use the serial port to send FT-817 commands to control the uBITX.
rOn
On May 31, 2018 at 5:09 PM Joe <joeman2116@...> wrote:
This looks great to see progress for ubitx and nextion integration.
I am looking at purchasing:
Nextion Enhanced 3.2" HMI Touch display
Product Code : RB-Ite-174
Would this work ok for working with your development?
Thanks Joe VE1BWV
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I put a 10 mF cap across C51, which is 1 mF. ?To me, it sounds better on SSB.
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Re: What does zero-beat sound like?
#ubitx
OK, I thought about this can of worms I opened on the ride home. Given the stores are 60 miles from the mountain top home I am staying at this summer I had roughly 45 minutes to sort through the various responses.
First, we should agree that the metric that establishes the accuracy one is aiming for is wave? lenght. Wave length of course is the distance propagated in one complete cycle. So Jerry is correct in that if your aim is to set an oscillator at a set frequency then being off by as much as 300 hz when using? a 30 MHz signal as a reference is equivalent to being off by 10 hz when using a 1 Mhz signal as a? reference. This is due to 10 cycles at 1Mhz and 300 cycles at 30 Mhz, when viewed as occupying distance, are equal in lenght.
If I have bad hearing it is normally at the low or high end of the spectrum and what Jerry pointed out shows that I can still obtain the accuracy of someone with better hearing by using a higher frequency for a reference signal and if our hearing is equivalent then I simply obtain higher accuracy by using the higher frequency reference signal.
As the other gentleman pointed out being able to have accuracy that resolves to perfection is most likely not even possible because of capacitor issues that end up blocking or at least attenuating the lowest of the lows in terms of audio signals.
However, I do disagree with defining theoretical so as to indicate other than actual conditions for while the theoretical and actual may not coincide there are times that they do.
Thank you all for chipping in to this discussion brought on by my thinking out loud. Its been interesting.
On Thu, May 31, 2018, 4:55 PM Dexter N Muir < dexy@...> wrote: I'm wondering if a multimeter on the (non-decoupled) audio might show it better. Measure AC, then DC. AC will register level down to say 10, maybe 5Hz, and DC (particularly analog-needle) will show variation by swing down to 0.1Hz? (10 seconds per swing).
Disclaimer: untried, but 'worth a crack, Nigel'? Purely theoretical, where would that be best measured?
73
Dex, ZL2DEX
|
This looks great to see progress for ubitx and nextion integration.
I am looking at purchasing:
Nextion Enhanced 3.2" HMI Touch display
Product Code : RB-Ite-174
Would this work ok for working with your development?
Thanks Joe VE1BWV
On Thu, May 31, 2018 at 1:33 PM, Ian Lee <kd8cec@...> wrote: Nextion LCD User and all
I released the version (V1.080) and experimented with various things.
from the beginning of uBITX firmware development, there was a request support for Nextion LCD.
Since version V1.073, various LCD was supported (Except Nextion LCD)
Some users have sent related materials to Nextion LCD and I have purchased Nextion LCD.
I do not know how to use Nextion LCD well.
I have seen DMR Hotspot use Nextion LCD.?I was surprised to see that users could easily implement their own UI programs on the Nextion LCD.
I can not use the Nextion LCD well but the interface with uBITX is implemented.
You do not need any hardware modifications to use the Nextion LCD.
Just remove the existing LCD and connect the Nextion LCD in place using 5 Lines.?It looks like an I2C LCD.
Like the DMR Hot Spot, I think users will be able to pick and use the UI.
If you want UI programming on Nextion LCD, please send me mail (with your mail address)
also?Please email me if you can beta test my protocol or 2.4 "LCD. I will send you a code to test Nextion LCD with uBITX and template code for Nextion LCD UI Designer.
I am making a UI suitable for 2.4 "LCD based on Template.?It's a $ 17 LCD that I bought from Aliexpress, but it's still good.
Ian KD8CEC
--
Best 73
KD8CEC / Ph.D ian lee
kd8cec@...
(my blog)
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Re: What does zero-beat sound like?
#ubitx
I'm wondering if a multimeter on the (non-decoupled) audio might show it better. Measure AC, then DC. AC will register level down to say 10, maybe 5Hz, and DC (particularly analog-needle) will show variation by swing down to 0.1Hz? (10 seconds per swing).
Disclaimer: untried, but 'worth a crack, Nigel'? Purely theoretical, where would that be best measured?
73
Dex, ZL2DEX
|
Re: boosting the power on 28 MHz
#ubitx
It's all due to marketing! 10 meters is called the "Magic Band". And
everybody loves magic. - Rich WB2GXM
toggle quoted message
Show quoted text
On 5/30/18, Bo Barry <bobarr@...> wrote: I'm constantly surprised at the interest in 10 meters. I always check 15. If
its dead I go to 20. If it has anything on it I check 10 and hear nothing
here in NC with a simple EFHW..
But 10 was a blast back in 1954!!? ?:)
73, Bo W4GHV since '54
|
I like as mine came from the factory. Indeed it has no basses. Also the tx audio sounds the same. In my unit frequencies below 700hz are cut down. Above 2.8khz are also cut. The filter seems to me quite effective. I could adjust the bfo to have more basses and less high. But I prefer like it is now also because the opposite sideband is really suppressed and the carrier attenuated. I see this as I always monitor my tx audio with an external sdr receiver. We can have a sked on the bands if you like if this would help.
Il 31/mag/2018 19:19, < aronax37@...> ha scritto: The sound from my uBitx has no bass. It sounds like an ancient mini-transistor radio receiver. Is the speaker from the Inkits case so bad?? My Youkits HB-1B on the same frequency and small external speaker sounds much better. Inkits case is relatively big, sound should by far better I think.
Ivo,OK2SHI
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To learn about the software you may want to get one of the nano processors and a display, and maybe one of the rotary encoders.? They are not very expensive, only about 2 or 3 dollars shipped from China.? You can hook them together and play with the software and see how to load and modify it without things being hooked to the uBITX.??
Lots of things on youtube about the nano and uno processors.They use the same processor, just different board layouts for the most part.
On Thu, May 31, 2018 at 1:50 PM, <hotrod541@...> wrote: I will be starting to assemble my uBITX after the case is delivered on 6/1.? I received the uBITX on 4/18 and have been waiting for the case to delivered from India. The board I received is marked N97014, 2/18, V3(c).? I need to know what upgrades wil be best to install now.? Please advise if there are any errors that need to be addressed at this time.? I would like to know if anyone is using the CCI EB63A amp.? Please let me know if the online assembly manual can be trusted to be correct.? I also need advice about installing the firmware, not real up to speed on this. This build will be a learning experience on the software side. Is there a good book that would be recommended as a learning tool for the Raduino firmware. I will be using this radio primarily on 40-80 meters at this time. Any and all advise will be greatly appreciated.
Thanks, buddy3223
KJ4ZSI
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Michael Shreeve
atouk