On Mon, May 31, 2021, at 09:33 PM, Ashhar Farhan wrote:
When someone finishes the usdx build, I would like them to measure the opposite sideband and the audio distortion. I am curious how well it works.
I too would be interested in actual performance data, most importantly the efficiency data.? Efficient portable SSB operation was the original goal of the ?SDX, gaining the Class E power efficiency for SSB use.? I have not seen this data for any of the kits offered, nor is the ongoing effort to constantly improve on the efficiency while maintaining reasonable signal quality.? Since it is the efficiency of power use as the goal, as long as the signal is intelligible and within legal requirements, then the goal is met if it has better power efficiency than similar SSB transceivers.? That would be total power for operation, not just the finals. I do not mean to criticize the effort.? It is amazing what has been done.? I am just not sure that the original goals are still the focus of the group. At the same time, while interesting, I can say that I will not be building one.? If there were a Teensy or another better-specified microcontroller I might be.? One reason for my interest in the sBITX that Ashhar Farhan is working on now.? Based on data from him so far, portable operation would not be one of the major goals.? The Raspberry Pi is a real power hog, up to 10 watts just to run it, and that does not include the display.? So far the superheterodyne seems to be the most efficient for SSB use.? That is NOT the case for CW as Hans Summers has proven with the QCX Mini.? I could be wrong about this, as it is not based on any real data that I have analyzed.? SDR is the trend as Icom and Elecraft are showing with their QRP portable rigs.? They still have a standard PA and are being driven by features more than power efficiency. The above are my thoughts, others will be different, and that is OK.? I am always open to new data to change my view. 73 Evan AC9TU
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Hello to list:
I have a uBitx3 running CEC firmware and the Nextion 3.5 display.
I have noted that the contrast potentiometer on the Raduino gets VERY hot.
I see from the schematic that it should be unused except for the + and - connections.
there is no connection to the Nextion through LCD3.
I placed a heatsink on it, but would rather just remove it.
Any ideas why it should be so hot?
best wishes
Richard VA3NDO
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When someone finishes the usdx build, I would like them to measure the opposite sideband and the audio distortion. I am curious how well it works. - f
Robert,
I have the boards and have completed one and it works nicely!? If you still want one, or two let me know.? I have not hooked up a mic and transmitted yet but the receiver works great.? Maybe I'll try to fry the finals tomorrow! ;-)
It will be fun to play with but I don't think my V6 should worry about being replaced as it just works so good!
If anybody else would like a board I'll have 8 to turn loose.
73,
Justin B.
KI5GKD
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Robert,
I have the boards and have completed one and it works nicely!? If you still want one, or two let me know.? I have not hooked up a mic and transmitted yet but the receiver works great.? Maybe I'll try to fry the finals tomorrow! ;-)
It will be fun to play with but I don't think my V6 should worry about being replaced as it just works so good!
If anybody else would like a board I'll have 8 to turn loose.
73,
Justin B.
KI5GKD
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On 2021-05-31 13:48, Jim Sheldon wrote: Jerry, nice idea, but won¡¯t work. Companies like >Mouser, Actually, it looks like Mouser beat me to it. They now have a system where you can upload a spreadsheet... - Jerry
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WWV audio tones are at known audio frequencies. Multiple applications can very accurately measure the audio frequencies, such as freely available FLDGI
Tune in WWV and adjust the dial until the audio frequency?in a single sideband mode is exactly where it should be, as an audio tone. The dial displayed frequency now displays how far off from perfect your calibration is.? ? Do some math and reset the software's understanding of the crystal frequency so as to correct for the error. When you get it right, you should find that the single sideband tone is precisely at the right audio frequency?when your dial is precisely at the WWV frequency. Gordon
On 2021-05-31 13:30, Curt via wrote:
> Jerry
>
> Why not tune in the same cw signal with your ubitx and ts590. It will
> be as good as your ears, so it will be just fine.
*** I was thinking something like that.? Or how about this:
The 590 has an AM receive mode.? I make up some sort of resistive
combiner/dummy-load so I can receive WWV and listen
to my ubitx transmit at the same time.
? ?In the meantime, I ordered one of those cheap GPS-disciplined
oscillators on Ebay.
? ? ? ? ? ? ? ? ? - Jerry KF6VB
>
> Curt
>
>
> Links:
> ------
> [1] /g/BITX20/message/88906
> [2] /mt/83210429/243852
> [3] /g/BITX20/post
> [4] /g/BITX20/editsub/243852
> [5] /g/BITX20/leave/10189903/243852/952924773/xyzzy
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One catch is that the economies of scale of buying SMD parts can be huge. It's sometimes cheaper to buy 10 parts than to buy 2, and sometimes cheaper to buy 100 parts than to buy 20. The unit price literally goes down by a factor of ten when you compare buying 100 rather than one.
On the other hand, kitting something with a significant number of SMD parts is a real pain. You have to tag a lot of the tapes, especially the chip capacitors, because the parts have NO identifying marks; there is no way to identify them visually. On Mon, May 31, 2021 at 5:17 PM Gerald Sherman < ve4gks@...> wrote: Also, there are those of us (and I am one) who lack the ability to
handle surface mount.? I can only see with one eye, so I have no depth
perception.
Gerry
Sent by the Thunderbird
On 2021-05-31 3:48 p.m., Jim Sheldon wrote:
> Jerry, nice idea, but won¡¯t work.? Companies like Mouser, Digi-Key and others¡¯ warehouse personnel are only trained to pick parts by their part number, not work from a BOM and there would be far too many pick errors if they would even accept your order in the first place.? They want EXACT manufacturers part numbers at a bare minimum but to get the order right, they really need their own part numbers.? Speaking from many years dealing with them, especially Mouser, Digi-Key and Tayda.
>
> Jim, W0EB
>> On May 31, 2021, at 3:35 PM, jerry@... wrote:
>>
>> ?I was just thinking - kitting up a project like this is a lot of work.? What if it was possible to send a Bill of Materials as a disk file - and we then submit that BOM to one of the major parts vendors - say Digikey or Mouser?? As one operation?
>>
>>? ?Because pointing and clicking at Mouser for each & every part is a lot of work too...
>>
>>? ? ? ? ? ? ? ?- Jerry KF6VB
>>
>>
>>
>>
>>> On 2021-05-31 13:14, ghhann wrote:
>>> So would I
>>> Best
>>> Glenn
>>> Sent via the Samsung Galaxy A52 5G, an AT&T 5G smartphone
>>> -------- Original message --------
>>> From: Evan Hand <elhandjr@...>
>>> Date: 5/31/21 3:18 PM (GMT-05:00)
>>> To: [email protected]
>>> Subject: Re: [BITX20] sBITX
>>> Ashhar Farhan,
>>> I too would be interested in a board set for the sBITX.
>>> 73
>>> Evan
>>> AC9TU
>>> Links:
>>> ------
>>> [1] /g/BITX20/message/88905
>>> [2] /mt/83191173/243852
>>> [3] /g/BITX20/post
>>> [4] /g/BITX20/editsub/243852
>>> [5] /g/BITX20/leave/10189903/243852/952924773/xyzzy
>>
>>
>>
>>
>
>
>
>
>
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Also, there are those of us (and I am one) who lack the ability to handle surface mount.? I can only see with one eye, so I have no depth perception.
Gerry
Sent by the Thunderbird
toggle quoted message
Show quoted text
On 2021-05-31 3:48 p.m., Jim Sheldon wrote: Jerry, nice idea, but won¡¯t work. Companies like Mouser, Digi-Key and others¡¯ warehouse personnel are only trained to pick parts by their part number, not work from a BOM and there would be far too many pick errors if they would even accept your order in the first place. They want EXACT manufacturers part numbers at a bare minimum but to get the order right, they really need their own part numbers. Speaking from many years dealing with them, especially Mouser, Digi-Key and Tayda.
Jim, W0EB
On May 31, 2021, at 3:35 PM, jerry@... wrote:
?I was just thinking - kitting up a project like this is a lot of work. What if it was possible to send a Bill of Materials as a disk file - and we then submit that BOM to one of the major parts vendors - say Digikey or Mouser? As one operation?
Because pointing and clicking at Mouser for each & every part is a lot of work too...
- Jerry KF6VB
On 2021-05-31 13:14, ghhann wrote:
So would I
Best
Glenn
Sent via the Samsung Galaxy A52 5G, an AT&T 5G smartphone
-------- Original message --------
From: Evan Hand <elhandjr@...>
Date: 5/31/21 3:18 PM (GMT-05:00)
To: [email protected]
Subject: Re: [BITX20] sBITX
Ashhar Farhan,
I too would be interested in a board set for the sBITX.
73
Evan
AC9TU
Links:
------
[1] /g/BITX20/message/88905
[2] /mt/83191173/243852
[3] /g/BITX20/post
[4] /g/BITX20/editsub/243852
[5] /g/BITX20/leave/10189903/243852/952924773/xyzzy
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On 2021-05-31 13:30, Curt via groups.io wrote: Jerry
Why not tune in the same cw signal with your ubitx and ts590. It will
be as good as your ears, so it will be just fine. *** I was thinking something like that. Or how about this: The 590 has an AM receive mode. I make up some sort of resistive combiner/dummy-load so I can receive WWV and listen to my ubitx transmit at the same time. In the meantime, I ordered one of those cheap GPS-disciplined oscillators on Ebay. - Jerry KF6VB Curt
Links:
------
[1] /g/BITX20/message/88906
[2] /mt/83210429/243852
[3] /g/BITX20/post
[4] /g/BITX20/editsub/243852
[5] /g/BITX20/leave/10189903/243852/952924773/xyzzy
|
Jerry, nice idea, but won¡¯t work. Companies like Mouser, Digi-Key and others¡¯ warehouse personnel are only trained to pick parts by their part number, not work from a BOM and there would be far too many pick errors if they would even accept your order in the first place. They want EXACT manufacturers part numbers at a bare minimum but to get the order right, they really need their own part numbers. Speaking from many years dealing with them, especially Mouser, Digi-Key and Tayda.
Jim, W0EB
toggle quoted message
Show quoted text
On May 31, 2021, at 3:35 PM, jerry@... wrote:
?I was just thinking - kitting up a project like this is a lot of work. What if it was possible to send a Bill of Materials as a disk file - and we then submit that BOM to one of the major parts vendors - say Digikey or Mouser? As one operation?
Because pointing and clicking at Mouser for each & every part is a lot of work too...
- Jerry KF6VB
On 2021-05-31 13:14, ghhann wrote:
So would I
Best
Glenn
Sent via the Samsung Galaxy A52 5G, an AT&T 5G smartphone
-------- Original message --------
From: Evan Hand <elhandjr@...>
Date: 5/31/21 3:18 PM (GMT-05:00)
To: [email protected]
Subject: Re: [BITX20] sBITX
Ashhar Farhan,
I too would be interested in a board set for the sBITX.
73
Evan
AC9TU
Links:
------
[1] /g/BITX20/message/88905
[2] /mt/83191173/243852
[3] /g/BITX20/post
[4] /g/BITX20/editsub/243852
[5] /g/BITX20/leave/10189903/243852/952924773/xyzzy
|
I was just thinking - kitting up a project like this is a lot of work. What if it was possible to send a Bill of Materials as a disk file - and we then submit that BOM to one of the major parts vendors - say Digikey or Mouser? As one operation?
Because pointing and clicking at Mouser for each & every part is a lot of work too...
- Jerry KF6VB
toggle quoted message
Show quoted text
|
Jerry
Why not tune in the same cw signal with your ubitx and ts590. It will be as good as your ears, so it will be just fine.?
Curt
|
So would I
Best
Glenn
Sent via the Samsung Galaxy A52 5G, an AT&T 5G smartphone
toggle quoted message
Show quoted text
-------- Original message -------- From: Evan Hand <elhandjr@...> Date: 5/31/21 3:18 PM (GMT-05:00) Subject: Re: [BITX20] sBITX
Ashhar Farhan, I too would be interested in a board set for the sBITX. 73 Evan AC9TU
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Ashhar Farhan,
I too would be interested in a board set for the sBITX.
73
Evan
AC9TU
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Yes, I would also be interested to see this as a board or kit available for purchase.? -- '72
Aaron K5ATG
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Re: Cheap Chinese Linear LPF
Tom
You may have to go to the but in years long past there
were a couple of hams who published their work in making their own
vacuum tubes.? They were working on both vacuum and gas filled versions.
Arv _._
On Sun, May 30, 2021 at 8:17 PM Tom, wb6b < wb6b@...> wrote: On Sun, May 30, 2021 at 06:56 PM, Gordon Gibby wrote:
Tom, if you get this working, let us all see how you did it.? ?I tried to build a DIODE as a teen and never succeeded.
Will do. I imagine it will be a learning adventure to get there.
Tom, wb6b
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Yes, i just got the digital board going. It works well on its own. I am going to plug it into the ubitx to test it out. I am planning to get a few made and populated (there are two, hard to solder ICs on it).? I ran into problems with the switching regulator but it is under control, i presume.
On Mon 31 May, 2021, 7:59 PM Jim AJ8S, < aj8s@...> wrote: ?Any chance that once your are ready you will post a PCB board on OSHPark or similar site along with a parts list here?
Enjoyed the talk and I am excited about the prospects. 73
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?Any chance that once your are ready you will post a PCB board on OSHPark or similar site along with a parts list here?
Enjoyed the talk and I am excited about the prospects. 73
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Re: Cheap Chinese Linear LPF
Mike, John describes it pretty well here:? ? /g/BITX20/message/88855He uses the coax outer braid for one winding of two turns,? the coax inner conductor as a second winding of 3 turns. They are pretty much separate electrically. Physically, the 3 turn winding is inside the two turn winding for all but the last turn. Jerry, KE7ER
On Mon, May 31, 2021 at 06:17 AM, n2msqrp wrote:
If I use the braid for the should I connect the inner conductor to the braid?
?
Mike N2MS
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All,
How do you measure frequency to get a really precise calibration on your radio? Right now, my uBITXv6 is within
a hundred Hz or so.
I did it by going back & forth between the setup screen
( using the TSW Raduino ) and ordinary receiving until I got it to where WWV sounded natural and human on both USB and LSB.
Instructions say to "zero beat" WWV. I found this hard for two reasons - 1. WWV transmits a tone - that results in multiple carriers. The tone stops when the voice announcements come in, but the voices only last several seconds. 2. With a properly adjusted BFO, you really can't hear the carrier to zero-beat it.
I do have a few frequency counters - but they has a crystal oscillator, same as the uBITX. Also an ancient Wavetek synthesized signal generator, which also has a crystal oscillator - although I think it does have an oven. Oh,
and my TS590S has a TCXO card, said to be "stable" to .1PPM ( AKA 1-Hz at 10MHz )
Ebay is rich with "GPS Disciplined Oscillators" from China for about $100. One listing claims a 10MHz output accurate to +/- .03Hz. That's WAY more accurate than I need, but why not?
- Jerry KF6VB
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Shirley Dulcey KE1L
Jim Sheldon
Aaron K5ATG