Hi Farhan from South-East a ways.
Bill N2CQR (he of SolderSmoke) would be a good Elmer: Fully capable both Digital and Analog, enthusiastic Constructor and collaborator.
My 2p-worth: Analog hardware is becoming rare, best sourced from junkboxes and swap-meets.
73,
Dex, ZL2DEX
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That would be classic. I already have the harmonic filter. hihi
--
73
Dave
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Check the relays. If it¡¯s in all bands then check the T/R relay, if it¡¯s just some bands, check the filter relays. In either case bad relay contacts would account for both problems.? Sent from an iPhone, don't ask whose.
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On May 12, 2020, at 11:18 AM, Jep <giuseppe.cavarretta@...> wrote:
?After a couple of years of excellent performance, my ubitx V3 (last V3 batch with TDA2822 on socket) suddenly showed reduced receiver sensitivity and no-RF out on transmit. I have done the following tests:
- +15V on power transistor: OK.
- +12V on the main board: OK.
- total current drain on key-down: 0.6A.
- installed new firmware 1.20: OK.?
- power transistors warm-up moderately on long key-down.
- driver transistor war-up a bit on long-key-down.
- receiver works on all bands, but it has reduced sensitivity compared to previous performance.
I have no oscilloscope and no access to any lab during the present pandemia lock-down.
Any suggestion? There is anything I could chek to track the fault?
Thank you, bests
Jep, IZ0WIT
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Yes exactly I was talking about the background crackle!
I solved!!!
By chance I discovered that the problem was an external HD connected to the pc!
They are the HDs that have no switch on and off, but come on when you turn on the PC and if you don't use it they go into stanby
If I disconnect the power to the HD the background crackling disappears!
HD works perfectly, or has problems or it is the 12V 1,5A power supply that, under strain, sends some spurious out.
It is known that the BITX40 is sensitive to anything that happens on the power line. Turn on a light and hear the crackle in the BITX, turn on the air conditioner and hear the crackle ... I'd like to find some system to be able to eliminate this sensitivity.
Thank you all
Sergio
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After a couple of years of excellent performance, my ubitx V3 (last V3 batch with TDA2822 on socket) suddenly showed reduced receiver sensitivity and no-RF out on transmit. I have done the following tests:
- +15V on power transistor: OK.
- +12V on the main board: OK.
- total current drain on key-down: 0.6A.
- installed new firmware 1.20: OK.?
- power transistors warm-up moderately on long key-down.
- driver transistor war-up a bit on long-key-down.
- receiver works on all bands, but it has reduced sensitivity compared to previous performance.
I have no oscilloscope and no access to any lab during the present pandemia lock-down.
Any suggestion? There is anything I could chek to track the fault?
Thank you, bests
Jep, IZ0WIT
|
Re: FS: uBit x V-1.5 yrs ago (V3 or V4?)
John
Do you have interest in a swap with an unbuilt V3 Kit with the enclose blue.
I purchased the kit but with a stroke I am unable to Build, I
I will pay shipping for mine to you. If needed I will send you pictures
Bill
WF9M
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On May 12, 2020 at 11:50 AM john <johnmb@...> wrote:
I built a unit (I think it's a V3) with the factory case. I think I neatly installed the AGC mod. I know it works on CW and I know it hears well. I ASSUME it works on SSB but I'm a CW op so I'm not positive.??
I think it's well built , it works and i'll ship it to your US address for $100.? ?
Pics on request if you send your email address. It looks like a grey uBitX :-)
John K5MO
?
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awesome. i heard doug demaw was a great 160m operator. he built many 160m qrp rigs. at times, i want to build a cw twin set (separate tx and rx) with the mandatory 10 watts output. all vfo, all cw. i guess it would be fun to see where analog takes us in this age. - f
On Tue, May 12, 2020 at 10:37 PM _Dave_ AD0B < davesters@...> wrote: Hi Ashhar,?
I have used 160 twice on"work all states" type of nets,?this spring before they quit for the season. I got 11 contacts from as far away as about 1200 miles.? Running a multi wavelength loop and it is generally quiet.? Using my V3.? Many hams on those nets ran power, but I got respect.
Hopefully others have ran 160 on ubitx .
73
Dave
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Hi Ashhar,?
I have used 160 twice on"work all states" type of nets,?this spring before they quit for the season. I got 11 contacts from as far away as about 1200 miles.? Running a multi wavelength loop and it is generally quiet.? Using my V3.? Many hams on those nets ran power, but I got respect.
Hopefully others have ran 160 on ubitx .
73
Dave
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FS: uBit x V-1.5 yrs ago (V3 or V4?)
I built a unit (I think it's a V3) with the factory case. I think I neatly installed the AGC mod. I know it works on CW and I know it hears well. I ASSUME it works on SSB but I'm a CW op so I'm not positive.??
I think it's well built , it works and i'll ship it to your US address for $100.? ?
Pics on request if you send your email address. It looks like a grey uBitX :-)
John K5MO
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There is nothing wrong with old just because of age. It's only a number.
Tell me about it! And that applies to the old-dog-new-tricks excuse some use for not trying the newer technology (e.g., SMD versus thru-hole kits). I've got shoes older than many people reading this post, but I still try to keep up. Almost always, it's worth the effort.
Jack, W8TEE
On Tuesday, May 12, 2020, 11:39:30 AM EDT, Bill Cromwell <wrcromwell@...> wrote:
Hi Wes,
I watch the news only *once* per day and try to catch whatever is coming
from Lansing (MI capital). If something happens right after I watch the
news -shrug-. I use some social media -facebook- to keep track of family
and a few friends. I fanatically avoid what I call the vicious nasties:)
There is also Zoom and and Facetime. Facetime is Apple-centric. Zoom is
for everybody.
I recently bought a nanoVNA because the ole SWR bridge and Johnson
Matchbox were not cutting the mustard at my location. The old antenna
myths have not been working. I am having to climb a learning curve *but*
I found a sweet spot for each of the bands I have in use here - 40, 30,
and 20 meters. I was having trouble getting out across the street at 4
watts. I set up the Matchbox for those sweet spots and now get heard
over 1000 miles out:) So a nanoVNA is new tech and the Mathcbox is old
tech. They worked pretty well together:)
There is nothing wrong with old just because of age. It's only a number.
The old gear still does what it always did. The ham a few hundred miles
(or even a couple of blocks) away does NOT know what you are using. They
can all sound the same:) I have the uBitX V3 (CEC software), a PFR-3, a
set of Kenwood Twins and some older Heathkit and Johnson gear. It's all
fun. Take time to enjoy it.
73,
Bill? KU8H
On 5/12/20 10:55 AM, Richard West via groups.io wrote:
> Hi Bill,
>
> That's a good response and additional use for the V4. Think external
> things have interfered with a clear thought process. Tired as most of
> staying home, trying to find meaningful things to occupy the time.
> Watching the depressive news, and other sources input is a waste of
> time. This has a tendency to put one under the rug deeper.
>
> Was as looking longly at the past rigs used or owned, and trying to
> relive the past. Remembering how much fun amateur radio was, the
> excitement of sending or receiving QSL cards for contacts, and the
> simple modes of operation with a modest station. These are good memories
> from my past QTHs. That to me was, is, and will continue the essence of
> amateur radio. Though others would tend to disagree, opting for the
> latest, and greatest equipment, or newest operating modes. Guess an old
> putz, I'll be.. Hi hi...
>
> 73,
>
> Wes
> KH2EE
>
--
bark less - wag more
--
Jack, W8TEE
|
Hi Wes,
I watch the news only *once* per day and try to catch whatever is coming from Lansing (MI capital). If something happens right after I watch the news -shrug-. I use some social media -facebook- to keep track of family and a few friends. I fanatically avoid what I call the vicious nasties:) There is also Zoom and and Facetime. Facetime is Apple-centric. Zoom is for everybody.
I recently bought a nanoVNA because the ole SWR bridge and Johnson Matchbox were not cutting the mustard at my location. The old antenna myths have not been working. I am having to climb a learning curve *but* I found a sweet spot for each of the bands I have in use here - 40, 30, and 20 meters. I was having trouble getting out across the street at 4 watts. I set up the Matchbox for those sweet spots and now get heard over 1000 miles out:) So a nanoVNA is new tech and the Mathcbox is old tech. They worked pretty well together:)
There is nothing wrong with old just because of age. It's only a number. The old gear still does what it always did. The ham a few hundred miles (or even a couple of blocks) away does NOT know what you are using. They can all sound the same:) I have the uBitX V3 (CEC software), a PFR-3, a set of Kenwood Twins and some older Heathkit and Johnson gear. It's all fun. Take time to enjoy it.
73,
Bill KU8H
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Show quoted text
On 5/12/20 10:55 AM, Richard West via groups.io wrote: Hi Bill,
That's a good response and additional use for the V4. Think external things have interfered with a clear thought process. Tired as most of staying home, trying to find meaningful things to occupy the time. Watching the depressive news, and other sources input is a waste of time. This has a tendency to put one under the rug deeper.
Was as looking longly at the past rigs used or owned, and trying to relive the past. Remembering how much fun amateur radio was, the excitement of sending or receiving QSL cards for contacts, and the simple modes of operation with a modest station. These are good memories from my past QTHs. That to me was, is, and will continue the essence of amateur radio. Though others would tend to disagree, opting for the latest, and greatest equipment, or newest operating modes. Guess an old putz, I'll be.. Hi hi...
73,
Wes
KH2EE
--
bark less - wag more
|
Re: ESP32 for uBitx v6 - Code & pictures
Code:?
Pictures and screenshots:?
¸é²¹³¾¨®²Ô
|
Hi Bill,
That's a good response and additional use for the V4. Think external things have interfered with a clear thought process. Tired as most of staying home, trying to find meaningful things to occupy the time. Watching the depressive news, and other sources input is a waste of time. This has a tendency to put one under the rug deeper.
Was as looking longly at the past rigs used or owned, and trying to relive the past. Remembering how much fun amateur radio was, the excitement of sending or receiving QSL cards for contacts, and the simple modes of operation with a modest station. These are good memories from my past QTHs. That to me was, is, and will continue the essence of amateur radio. Though others would tend to disagree, opting for the latest, and greatest equipment, or newest operating modes. Guess an old putz, I'll be.. Hi hi...
73,
Wes
KH2EE
|
Dave, the main reason why I had to skip the LPF was the lack of extra pins on the Arduino. I have never operated the top band though i am very intrigued by it. - f
?I finally put on my low pass filter for 160 on thingiverse.??
?This was my original post here.?/g/BITX20/message/77231?
?Obviously this is a design that you need to hook between the radio and antenna when using 160 and remove for other bands.
It seems like such a simple thing that Ashar might include as a kit and auto switch it. I am sure it could be made more compact with toroids although I was surprised at how compact it is even with air core.
--
73
Dave
|
?I finally put on my low pass filter for 160 on thingiverse.?? ?This was my original post here.? /g/BITX20/message/77231??Obviously this is a design that you need to hook between the radio and antenna when using 160 and remove for other bands. It seems like such a simple thing that Ashar might include as a kit and auto switch it. I am sure it could be made more compact with toroids although I was surprised at how compact it is even with air core. -- 73 Dave
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He is talking about the background crackle.
Sergio, try a 1K - 10K (any) resistor in series with center lead of volume control.
Raj, vu2zap
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Reed, I will try this tonight & update here, thank you very much .?
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Could it be that a new station started doing JT65 near you? 7.076MHz is the "default" frequency for JT65 in the US (). Or are you hearing that same sound on other frequencies too?
Reed
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Sergio I am quite sure that your problem is caused by a not correct calibration of the transceiver, I suffer the same last month, try 15 for the calibration and 11.056,6 for the BFO if you have a v5 uBITX. See you later Edoardo
Il giorno mar 12 mag 2020 alle ore 08:28 SaMa photo SaMa photo < infosamaphoto@...> ha scritto: Thanks Curt but the problem is not that! I positioned it on that frequency because it was the only signal I received, the problem is that it is scric like chips that fry on the bottom that was not there before!
Sergio
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Thanks Curt but the problem is not that! I positioned it on that frequency because it was the only signal I received, the problem is that it is scric like chips that fry on the bottom that was not there before!
Sergio
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_Dave_ AD0B
Jep
Raj vu2zap
Darwin EI4KX