Another uBitX V3 For Sale, with Extras
I also have an unbuilt V3 uBitX kit for sale. I have too many projects going on so I've decided to pass it along. It's still in the original bubble wrap in the original plastic box except that I did open up the Raduino module and loaded the KD8CEC version 1.08 firmware into it and plugged it into my other uBitX to be sure it works (it does). I can load another firmware release into it if you'd prefer.
It's a late V3, I got it about a week before the V4 started shipping, so it has the socketed audio amp chip.
And to sweeten the deal a little, I'll include:
- the parts to do the V4 pop fix (2n7000, cap, resistor, etc)
- an ND6T/K5BCQ AGC kit (uses surface mount parts)
- knobs to fit the volume control pot and the encoder shafts
- a small PCB to mount the three small phone jacks (makes wiring them a lot easier)
All for $125 (Paypal only, please), shipped USPS priority mail to US address only. Email me for Paypal info.
73... Mark AA7TA
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Hi Tom.........The only res. fitted is the 4K7 pull?up, 5V to the key jack....I'm baffled 73
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One possibility is the software may be thinking you are using a paddle. Did you wire up the key with one of the resistors in series or without a resistor? When using a paddle the factory firmware uses resistor values to determine if you are hitting the
dot or dash paddle. A straight key should have no resistor.?
Tom, wb6b
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fascinating. Never saw that FIREBIRD brand swr meter before, but sure enough, you can find it on facebook and yes, they are apparently meant for far more power than a CB radio can produce. Allison found a really net section of the antenna free pdf and there really are some gems in there!!! I would caution that with a really short antenna (the quintessential example is a small loop) the losses in the matching system can be much larger than expected (by the unwary) because the radiation resistance may be so small that OHMIC losses are now quite consequential in the matching network/feedline etc. With an antenna of more than say 1/3 wavelngth I think there really isn't much of an issue with reasonable sized conductors etc. But then of course, I'm sure someone can find an exeption to that!! I have a good friend, experienced ham, and he found his "loop" to be about 10dB worse than a full size dipole and some published work has corroborated that. How does this relate to the uBitx? The losses in some antenna designs can be even larger than the dB difference between a 100 watt rig and the uBitx....putting you REALLY in a QRP situation. I'm really excited by the work Warren and others are doing with the filters. Great work! Cheers! Gordon ________________________________________ From: [email protected] < [email protected]> on behalf of Vince Vielhaber <vev@...> Sent: Monday, September 10, 2018 2:59 PM To: [email protected]Subject: Re: [BITX20] uBitx Antenna #ubitx-help Right, well this firebird isn't even usable as an swr meter unless you put about a kilowatt into it. In the FWD, the meter won't go full scale below about 14 MHz. Vince. On 09/10/2018 07:41 AM, iz oos wrote: I have a cheap CB swr meter (just swr not power meter) and a crossneedle
ham-meter. In the instruction sheet they say it is usable between
1.8-30! They are liers!!!! It works from 1.8 to 50Mhz (yes up to the
6meters band) !!! Very similar reading to the ham meter!!! What a
shame... They don't even know what they sell... hihi... hi
Il 10/set/2018 07:40, "Vince Vielhaber" <vev@...
<mailto:vev@...>> ha scritto:
SWR and Wattmeters made for CB are often worthless in the ham bands,
unless you're only using 10M. I picked up a Firebird SWR/Wattmeter
a while back that was supposed to be good for 1.8-30 MHz. HAR!
That thing won't even read accurately (or even semi-accurately) at
21 MHz and gets progressively worse the lower you go. It barely
responds with almost 1KW going into it at 3.9MHz. Needless to say
it's going back on ebay. It is fairly accurate on 10 meters, so it
probably is on 11 too.
Vince.
On 09/09/2018 03:13 PM, Gordon Gibby wrote:
The only cb ones I have tried on 2 m are the long parallel rod
pick up type, they were quite in accurate
For VHF/UHF I use ham products made for the purpose
Cheers
Gordon kx4z
On Sep 9, 2018, at 13:59, Bill Cromwell
<wrcromwell@... <mailto:wrcromwell@...>> wrote:
Hi,
It might start to be a little shaky on the two meter band.
And maybe will work there too.
73,
Bill KU8H
On 09/09/2018 05:37 AM, gonewiththeego@...
<mailto:gonewiththeego@...> wrote:
I was thinking about an Albrecht SWR 20 which I can see
that is used
only for CB. Do you think it should work for 20/40m band ?
--
bark less - wag more
--
Michigan VHF Corp.
-- Michigan VHF Corp.
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Right, well this firebird isn't even usable as an swr meter unless you put about a kilowatt into it. In the FWD, the meter won't go full scale below about 14 MHz.
Vince.
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On 09/10/2018 07:41 AM, iz oos wrote: I have a cheap CB swr meter (just swr not power meter) and a crossneedle
ham-meter. In the instruction sheet they say it is usable between
1.8-30! They are liers!!!! It works from 1.8 to 50Mhz (yes up to the
6meters band) !!! Very similar reading to the ham meter!!! What a
shame... They don't even know what they sell... hihi... hi
Il 10/set/2018 07:40, "Vince Vielhaber" <vev@...
<mailto:vev@...>> ha scritto:
SWR and Wattmeters made for CB are often worthless in the ham bands,
unless you're only using 10M. I picked up a Firebird SWR/Wattmeter
a while back that was supposed to be good for 1.8-30 MHz. HAR!
That thing won't even read accurately (or even semi-accurately) at
21 MHz and gets progressively worse the lower you go. It barely
responds with almost 1KW going into it at 3.9MHz. Needless to say
it's going back on ebay. It is fairly accurate on 10 meters, so it
probably is on 11 too.
Vince.
On 09/09/2018 03:13 PM, Gordon Gibby wrote:
The only cb ones I have tried on 2 m are the long parallel rod
pick up type, they were quite in accurate
For VHF/UHF I use ham products made for the purpose
Cheers
Gordon kx4z
On Sep 9, 2018, at 13:59, Bill Cromwell
<wrcromwell@... <mailto:wrcromwell@...>> wrote:
Hi,
It might start to be a little shaky on the two meter band.
And maybe will work there too.
73,
Bill KU8H
On 09/09/2018 05:37 AM, gonewiththeego@...
<mailto:gonewiththeego@...> wrote:
I was thinking about an Albrecht SWR 20 which I can see
that is used
only for CB. Do you think it should work for 20/40m band ?
--
bark less - wag more
--
Michigan VHF Corp.
--
Michigan VHF Corp.
|
Hi, gone with the go¡ª
Almost anything works receiving. More power to you for learning how to get a transmitting antenna going
As you gain skills, you¡¯ll eventually want to deal with the harmonics or spurs with the transceiver, and it isn¡¯t that terribly difficult and a great learning chance
All things in good time
Gordon kx4z
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On Sep 10, 2018, at 14:05, Bill Cromwell <wrcromwell@...> wrote:
Hi Tom,
Building one is so easy that even *I* can do it.
73,
Bill KU8H
On 09/10/2018 01:55 PM, Tom, wb6b wrote:
I have an auto tuner, but what happens in the auto tuner stays in the
auto tuner. So having another SWR bridge (as well as a extra manual
tuner) would be nice.
I would have thought that CB SWR/Power meters do not have as critical
selection requirement for core material and other design parameters, for
the toroid transformer type, so might have a limited frequency range.
But, it sounds like in many cases they use a proven design and don't
bother to make it cheaper by a few pennies by selecting worst core
materials and such. That is encouraging for the possibility of buying a
low cost spare SWR meter. I plan to head to one of the ham flea markets
and try my luck at getting something, but the closest one is a long
drive. Amazon, UPS and the post office are good things here.
True, it is not hard to build one either.
Tom, wb6b
_._,_._,_ --
bark less - wag more
|
Hi Tom,
Building one is so easy that even *I* can do it.
73,
Bill KU8H
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On 09/10/2018 01:55 PM, Tom, wb6b wrote: I have an auto tuner, but what happens in the auto tuner stays in the
auto tuner. So having another SWR bridge (as well as a extra manual
tuner) would be nice.
I would have thought that CB SWR/Power meters do not have as critical
selection requirement for core material and other design parameters, for
the toroid transformer type, so might have a limited frequency range.
But, it sounds like in many cases they use a proven design and don't
bother to make it cheaper by a few pennies by selecting worst core
materials and such. That is encouraging for the possibility of buying a
low cost spare SWR meter. I plan to head to one of the ham flea markets
and try my luck at getting something, but the closest one is a long
drive. Amazon, UPS and the post office are good things here.
True, it is not hard to build one either.
Tom, wb6b
_._,_._,_
--
bark less - wag more
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Brand New.? -- it's a second one I never built.? ?$120 shipped Priority Mail to US only.
Paypal only.? Email me for Paypal address.
73, Gerry W1VE
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It might be more productive if general discussion about antennas were to migrate
Arv _._
On Mon, Sep 10, 2018 at 11:20 AM, <gonewiththeego@...> wrote: I'm just amazed of how much priceless information I got in such a short time. Thank you for all users that had answered my questions and gave me even more than that: good advices for the future. Speaking about modifications for the uBitx, I'm not prepared for this task and I'm sure I will leave it as it is. I'll stay for reception mode until I find an SWR-meter and build a dipole. I believe a "random" lenght wire will suffice for just reception. So, thank you very much again and I'm sure we will read us soon because I still have tons of questions but ... one step at the time. THANK YOU!?
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I have an auto tuner, but what happens in the auto tuner stays in the auto tuner. So having another SWR bridge (as well as a extra manual tuner) would be nice.
I would have thought that CB SWR/Power meters do not have as critical selection requirement for core material and other design parameters, for the toroid transformer type, so might have a limited frequency range. But, it sounds like in many cases they use a proven design and don't bother to make it cheaper by a few pennies by selecting worst core materials and such. That is encouraging for the possibility of buying a low cost spare SWR meter. I plan to head to one of the ham flea markets and try my luck at getting something, but the closest one is a long drive. Amazon, UPS and the post office are good things here.?
True, it is not hard to build one either.?
Tom, wb6b
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Re: Have to adjust master calibration on power up - does not save
I think that your uBitx thinks you are not calibrated. There is a function of the software which is entered when you have the encoder switch depressed during power up. Did you install capacitors on your encoder lines for de-bouncing? If yes thry to remove the one on the switch line and see if it helps. -- Ion
VA3NOI
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Lowering the price to $95 shipped (in continental US)
On Thu, Sep 6, 2018 at 7:36 AM, Walter Keen <walter@...> wrote: unassembled ubitx v3 kit with factory socketed tda2822 (non WX branded) with all the components it originally came with.
opened container to inspect components and haven't gotten to building it, too many repair projects, and starting to think my bitx40 would make a better hiking/backpacking radio due to multiband antenna complications, so this has to go to help fund other projects
$115?shipped, USPS flat rate in the Coninental US.? won't ship internationally, sorry? PayPal only
Walter at
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I'm just amazed of how much priceless information I got in such a short time. Thank you for all users that had answered my questions and gave me even more than that: good advices for the future. Speaking about modifications for the uBitx, I'm not prepared for this task and I'm sure I will leave it as it is. I'll stay for reception mode until I find an SWR-meter and build a dipole. I believe a "random" lenght wire will suffice for just reception. So, thank you very much again and I'm sure we will read us soon because I still have tons of questions but ... one step at the time. THANK YOU!?
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I've solved it!
I set the calibration sound first, tuning for a near 1khz sound compared with that from my phone, then tuning the BFO to get the best match between the 1khz signal generated on my phone with the sound received. I also found that I could set the BFO frequency twice, in effect! The first time it was too high, near 12MHz, then as I tuned the BFO down the audio signal fell in frequency. I continued to tune down and the audio returned and I was able to set and match the tones. I checked my LSB/USB settings with 14074Mhz and found they were the right way around too.
I also found the radio needed rebooting after setting the calibration and BFO.
Graham
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Magnetic loop.
http://www.aa5tb.com/loop.html
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Re: Surprised by generous and kind act
#bitx40
Total agreement here.? Amateur radio - elmering, helping each
other out, and so on - there used to be a code of conduct, which
is a good thing. ? I think it's still published and in the
handbook, but I rarely hear anyone mention it.
On 09/10/2018 06:02 AM, David Wilcox via Groups.Io wrote:
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This is TRUE ham radio.
Dave K8WPE
On Sep 9, 2018, at 12:15 AM, Robert D. Bowers < n4fbz@...>
wrote:
Today I was greatly and pleasantly surprised.? I'd
mentioned that I was thinking about converting my BITX20 to 40
meters, and I'd related some stories of frustration with the
local ham community (generosity and willingness to help others
seems to be a rarity in this area).
When I got our mail, there was a package in it - with a
BITX40!? The housing it was in is very attractive as far as my
wife and I are concerned - and perfect for our car.? The neat
part was that you could see the circuitry in it - and the case
also would lend itself to portable operation!
I won't embarrass the sender, but I will say it came from
another state.? For many years, I've insisted that there was
no such thing as Karma... but this suggests otherwise!
To the sender (not named) - a big Thank you!
from both of us, and (laugh) no worry about "paying forward" -
we do things all the time like that, whenever we can (we may
not have much money, but we do have skills and knowledge we
share).? Generosity and helping others is not a big price for
gifts like this - in our opinion!
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Re: install 20x4 I2C Display - Problem without 3.3v ?
Fabian, I am not familiar with your particular display or the CEC software. Perhaps someone else can respond here after looking at the photo of your display in your previous post, and tell you if it will work with the CEC software in parallel mode. ? You should be able to determine if the pullup resistors for the SDA and SCL pins are present by using an ohmmeter.? Measure from the SDA pin to the 5v power pin. If the resistor is present, it will be between 5000 and 2000 ohms.? (If there is no resistor present then that reading will likely be 50000 ohms or more.)? You can then find that resistor so you can remove it by measuring from the SDA pin to the various possible resistors and looking for zero ohms.? Then do the same for the SCL pin. For the CEC software to be able to talk to the i2c adapter board, you must make sure the software knows the correct i2c address to use as per post? /g/BITX20/message/39966The easiest thing is to scan the i2c device by running special i2c scanning software on the Nano. Also, the i2c adapter board must be using a particular interface IC that the CEC software knows how to talk to.? I believe that should be either a? PCF8574T or?PCF8574ATJerry
On Mon, Sep 10, 2018 at 08:09 AM, sdr freak wrote:
Hello Jerry!
Very much thanks and that is nice to hear these kind of post, i looking forward now and every post like this, which gives me good information is very nice!
ok when put the I2C board away from the display, with desoldering of this part, then i can post you few pics from the backside of the I2C board and i can run for first time my ubitx with the CEC software at the 20x04 Display in paralell-mode ? or is there a new problem to use it, when i desolder the I2C board awy from the Display and would run up like an normal paralell 20x04 Display? is there anything what i should or must do in progress of use as paralell Display, like other mods or something or is that ready to use at this point?
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Kees noted that you can't actually ground through C11 but rather R13- despite of my attempt to. :)
I'll switch that up this evening.
John
KC9OJV
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On Sun, Sep 9, 2018 at 04:02 PM, jim wrote:
id Change the output transformer (T11) to 2 FB43-801's like a binoc core ..3 T pri, 5 T sec ..just to start ..The other one was kinda making the waveshape look like a triangle wave generator (lotsa 3x harmonics I assume)
Sounds like drive issues and not enough current.? Also 3:5 Turns may be a bit steep try 3:4 or 2:3.
Don't forget you have the fets standing on those long legs at at low impedance loads
those legs are simple low value chokes.? Doesn't help that the heat sinks are antennas
near the driver and predriver.
Allison
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Re: install 20x4 I2C Display - Problem without 3.3v ?
Hello Jerry!
Very much thanks and that is nice to hear these kind of post, i looking forward now and every post like this, which gives me good information is very nice!
ok when put the I2C board away from the display, with desoldering of this part, then i can post you few pics from the backside of the I2C board and i can run for first time my ubitx with the CEC software at the 20x04 Display in paralell-mode ? or is there a new problem to use it, when i desolder the I2C board awy from the Display and would run up like an normal paralell 20x04 Display? is there anything what i should or must do in progress of use as paralell Display, like other mods or something or is that ready to use at this point?
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Gerry Hull
Ion Petroianu, VA3NOI
YO8UFO
Ken K4KCL
sdr freak