Gordon,
The v4 audio works fine but a little low on gain. Farhan has inadvertently forgotten to add that extra component required.
The mod is extremely simple, anyone can do it. At low volumes you can distinctly hear the improvement and increase
in volume.
The change was made so that uBitx will not depend on chips that are obsolete or parts that may become..
I sincerely dislike the LM386!
Raj
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At 10-07-18, you wrote: Raj, that is a solution, but isn?€?t it fairly simple just to use a low parts count LM 386 amplifier for all this? It seems to me that making such a widely available part work properly would be the better long-term solution, able to work with multiple output impedances, temperatures voltages etc. Am I missing something? > On Jul 10, 2018, at 02:01, Raj vu2zap <rajendrakumargg@...> wrote: > > The volume increases a lot if you do the quiescent current adjust mod that I have > described before. > > Cut track between D15 and D16.. solder a multiturn vertical preset between the > two diodes and zero the preset resistance and slowly increase the preset till > the volume of background noise stops increasing. Check if final audio transistors > are hot, if hot reduce the preset.. > > Raj > > At 10-07-18, you wrote: >> My v4 ubitx has low audio if I try to use a speaker, with headphones it is reasonable. > > > >
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Re: uBITX raduino no if output help please
I had a similar problem Mike,
I came back to town after a few weeks and found the raduino misbehaving. It would not program from
the PC but would display normally.. I finally reset it and that bricked it!
Replaced the nano and all is well.
Raj
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At 10-07-18, you wrote: Hi all, I have been away from the uBITX groups and pages for a while. My uBITX has developed a problem some time ago and I have just got around to trying to sort it out.
It seems the raduino is at fault. I am not getting any IF frequencies out of it. The 25mhz crystal is oscillating and the LCD is indicating frequencies etc, but no measureable IF outputs from the raduino board. it still has the original firmware from the early production uBITX kits. What is my best course of action? reflash the raduino firmware or is it more like a hardware issue?
thanks in advance.
--
Mike VK3XL
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Re: No CW Key Jack Wiring (Check My Work)
#ubitx
Instead of omit the keyer, i use a switch to activate and use the CW as a constant carrier signal for antena tunning. It's easier than say Helooooooooooooooooooo!
73
David, CA3DPV
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Raj, that is a solution, but isn¡¯t it fairly simple just to use a low parts count LM 386 amplifier for all this? It seems to me that making such a widely available part work properly would be the better long-term solution, able to work with multiple output impedances, temperatures voltages etc.
Am I missing something?
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Show quoted text
On Jul 10, 2018, at 02:01, Raj vu2zap <rajendrakumargg@...> wrote:
The volume increases a lot if you do the quiescent current adjust mod that I have
described before.
Cut track between D15 and D16.. solder a multiturn vertical preset between the
two diodes and zero the preset resistance and slowly increase the preset till
the volume of background noise stops increasing. Check if final audio transistors
are hot, if hot reduce the preset..
Raj
At 10-07-18, you wrote:
My v4 ubitx has low audio if I try to use a speaker, with headphones it is reasonable.
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Re: AB5N, Bob Nagy U-Tube Video
Hi Mike,
Hams are in all walks of life and every one of us have divergent, other interests besides our professions - or how we earn our livings - and our ham radio hobby. We make some attempt at staying "on topic" in the forums and that tends to hide all those interesting other faces we all have. At the same time, those other faces are exactly what drags us off topic so often :) That is not all bad:)
73,
Bill KU8H
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On 07/10/2018 01:07 AM, Mike aka KC2WVB wrote: Bill,
We were a bit different when we were boys presumably, in the late 50's
and early 60's. You loved electronics and I loved carpentry and never
gave electronics more than a passing glance.
When I was 5 or 6 I tried to talk my grandpa into the two of us building
an airplane but he turned the concept down for a later go. However I did
build a boy size stage coach and later a small canal boat around the age
of 11 or 12. So, carpentry and no electronics has been in my blood for a
very long time and the only thing I like as well is the field I went
into which is pure mathematics which I can bore the scrap out of most
people if they allow me to start on the topic but I do find electronics
a fun hobby none the less.
--
bark less - wag more
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Re: LED Power Output Indicator
#ubitx
Lee
I put it up on ubitx.net , but I have now corrected the diagram
for you!? Glad you are now getting more power up the spout!
Mike ZL1AXG ubitx.net
On 10/07/18 8:17 AM, Lee wrote:
Oh-Oh.? I figured
out why my led was so bright.? The circuit was eating up my
output.?? The diagram my? PSK31 ham friend sent me is wrong.? It
showed the bottom of the circuit grounded.? Nope, they needed to
be connected together but not grounded.?? I found a similar
circuit which uses a capacitor instead of the resistor.? I now use
a 2 volt green diffused LED which is easy to see but not as bright
as the original but it does not load the output as before.
Here is a working circuit and whoever posted it on could they put up
the corrected circuit.
--
Lee - N9LO? "I Void Warranties"
?
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Re: Crystal CW filter with Version 4 uBITX boards?
#ubitx
Doesn't look bad.
For the record, I have not duplicated the in and output transformers for the extra xtal filter. So I only use L1 to L4 and let them transform both frequencies.
Yesterday I had a? mistype, I use 8 xtals and not 10, my wide filter is the normal one from the original schematic.
Alex
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Re: uBITX raduino no if output help please
Hi Mike, I used to live just over the back of you in Eden Grv.? (I have now moved just down the road to the Lakes area ) ??
Is it only the IF outputs not working or is it also the VFO output not working?
Glenn
vk3pe
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On Mon, Jul 9, 2018 at 10:48 pm, <vk3xl@...> wrote:
Hi all, I have been away from the uBITX groups and pages for a while. My uBITX has developed a problem some time ago and I have just got around to trying to sort it out.
It seems the raduino is at fault. I am not getting any IF frequencies out of it. The 25mhz crystal is oscillating?and the LCD is indicating frequencies etc, but no measureable IF outputs from the raduino board. it still has the original firmware from the early production uBITX kits. What is my best course of action? reflash the raduino firmware or is it more like a hardware issue?
thanks in advance.
--
Mike VK3XL
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Re: Bitx arduino reprograming
Hi Jack,
thank you for help and Infos.
sorry I can use the pc but can¡¯t work with him.
have no idea how I can realise all this stuff.?Theorie and practice are often different.
Now I am pretty disappointed about myself. Perhaps my son (which is much more interested in computing)
can find a solution with your helpful hints and tips.
Kind regards, Elmar.
?
Gesendet:?Dienstag, 10. Juli 2018 um 00:28 Uhr
Von:?"Jack Purdum via Groups.Io" <jjpurdum@...>
An:[email protected]
Betreff:?Re: [BITX20] Bitx arduino reprograming
?
I don't know if this is your problem, but you may not have the device drivers install for your system. Look in the drivers subdirectory off the main directory (e.g., C:\Arduino1.8.5\drivers) and look for the drivers program dpinst-amd64.exe. Try running that. You must then reload the Arduino IDE to activate the new driver. When you look in the Tools --> Board menu item, your Arduino should be selected. Using the menu Tools --> Port, you should see some COM port selected. If so, try to recompile your program.
?
Jack, W8TEE
?
On Monday, July 9, 2018, 6:05:24 PM EDT, Elmar V?ller <dl2qa@...> wrote:
?
?
Hello,
have Followed the Installation Instructions?-amounters/bitx40)
and hopefuly load all well.
problem is, i am complete unexperienced with pc stuff.
I get?the Message: Upload to board fail com1
Spend a lot of Time but no success .
73,Elmar.
?
Gesendet:?Montag, 09. Juli 2018 um 22:02 Uhr
Von:?"Doug W" <dougwilner@...>
An:[email protected]
Betreff:?Re: [BITX20] Bitx arduino reprograming
what exactly have you tried and what exactly were the results?? it will be easier to help you if we know what is going on.
--
?
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Re: NEXTION DISPLAY UPDATES For KD8CEC ver 1.094 up
Digole make a 'smart' TFT also.? Not as smart though as the Nextion from what I have seen, but useful nonetheless in other projects.?? There is no IDE like Nextion, just a large number of commands.?
glenn
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On Mon, Jul 9, 2018 at 08:59 pm, Joe wrote:
Bob,
The code is unique to Nextion displays only.. The nextion display is one of the only intelligent displays having its own microprocessor, memory etc..
?
Joe
On Tue, Jul 10, 2018 at 12:49 AM Bob Bennett via Groups.Io <bobsmacbox= [email protected]> wrote: I have an old TFT_320QVT layng around. I wonder if the code for the Nextion is generic for other touch displays or is it unique to Nextion?
Bob nz2z
|
The volume increases a lot if you do the quiescent current adjust mod that I have
described before.
Cut track between D15 and D16.. solder a multiturn vertical preset between the
two diodes and zero the preset resistance and slowly increase the preset till
the volume of background noise stops increasing. Check if final audio transistors
are hot, if hot reduce the preset..
Raj
toggle quoted message
Show quoted text
At 10-07-18, you wrote: My v4 ubitx has low audio if I try to use a speaker, with headphones it is reasonable.
|
Re: Crystal CW filter with Version 4 uBITX boards?
#ubitx
Just for fun I simulated a dual filter 12MHz and 3.58MHz crystal filter using ltspice. I got the 12MHz crystal parameters from a Dave Jones video demonstrating the Bode 100. The 3.58MHz crystal parameters are just the default from the AADE filter program.
Cheers, Ian
|
uBITX raduino no if output help please
Hi all, I have been away from the uBITX groups and pages for a while. My uBITX has developed a problem some time ago and I have just got around to trying to sort it out.
It seems the raduino is at fault. I am not getting any IF frequencies out of it. The 25mhz crystal is oscillating?and the LCD is indicating frequencies etc, but no measureable IF outputs from the raduino board. it still has the original firmware from the early production uBITX kits. What is my best course of action? reflash the raduino firmware or is it more like a hardware issue?
thanks in advance.
--
Mike VK3XL
|
Raj and David, ?I had some old UPS units lying faulty. I removed other stuff except the transformer. ?I have used the the inverter section winding. My unit had charger winding separate. With a 3510? molded bridge and LT1083CP on a suitable heat sink, I could realize a nice? , and almost? of 6amps PSU at 13,8V.
Even though the winding is small winding closer to core, and? Primary Over that, I did not trouble me. ?Lucky for me the E&I? core is packed? criss-cross and not one sided as many UPS transformers are.
?Hope my experience3 helps realize a? Linear psu, without need to wind or buy a Trafo.
?regards ?sarma vu3zmv
On Tue, Jul 10, 2018 at 6:57 AM, bigdswitzer <bigdswitzer@...> wrote: Hi Raj, have you had time to test one of those power supplies on the uBITX. Just curious, thanks
David
KG7WFM
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Re: AB5N, Bob Nagy U-Tube Video
Bill,?
We were a bit different when we were boys presumably,? in the late 50's and early 60's. You loved electronics and I loved carpentry and never gave electronics more than a passing glance.
When I was 5 or 6 I tried to talk my grandpa into the two of us building an airplane but he turned the concept down for a later go. However I did build a boy size stage coach and later a small canal boat around the age of 11 or 12. So, carpentry and no electronics has been in my blood for a very long time and the only thing I like as well is the field I went into which is pure mathematics which I can bore the scrap out of most people if they allow me to start on the topic but I do find electronics a fun hobby none the less.
Hi Allard,
I made a new steel box for my uBitx. But my first project when I was
about 13 was a V-O-M I built into a heavy paper cigar box. The radio
will be better off and you will be happier if it is shielded and that
means surrounded by metal. But we can tack some aluminum sheet inside
that paper, wood, or plastic box where nobody can see it and that will
work. The aluminum foil sold for kitchen use is awfully flimsy. I have
had better service using the heavier aluminum pans that frozen foods
like Lasagna or Mac n Cheese are packaged in. Easily shaped and sturdy
enough to stay that way. Hint...I washed the food residue off them
before I put them in my radios <sly grin>.
73,
Bill? KU8H
On 07/09/2018 07:17 PM, Allard PE1NWL wrote:
> On Tue, July 10, 2018 00:36, Mike aka KC2WVB wrote:
>
>> Nobody is proficient at or cares about everything so this means something
>> to perhaps only me and that is the carpentry skills on Bob's radio's
>> enclosure were other than what I would aim for.
>
> I believe the message that he wanted to get across is that just about
> anything can be used as an enclosure for this wonderful radio.
>
> I once built one in a carton shoe box - no carpentry at all - works great!
>
> 73 Allard PE1NWL
>
>
>
>
--
bark less - wag more
|
Re: NEXTION DISPLAY UPDATES For KD8CEC ver 1.094 up
Bob, The code is unique to Nextion displays only.. The nextion display is one of the only intelligent displays having its own microprocessor, memory etc..
Joe
On Tue, Jul 10, 2018 at 12:49 AM Bob Bennett via Groups.Io <bobsmacbox= [email protected]> wrote: I have an old TFT_320QVT layng around. I wonder if the code for the Nextion is generic for other touch displays or is it unique to Nextion?
Bob nz2z
|
Re: NEXTION DISPLAY UPDATES For KD8CEC ver 1.094 up
I have an old TFT_320QVT layng around. I wonder if the code for the Nextion is generic for other touch displays or is it unique to Nextion?
Bob nz2z
|
Re: NEXTION UPDATES FOR 7 AND 5 INCH - --ADAPTED FOR KD8CEC VER 1.095
Joe, Thanks for the files. I compiled them for my &E display and it works great! Many thanks, Vern AA7HC ? 
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Re: experience with Sunil VU3SUA's enclosures
#ubitx
FYI, I received the case today 45 days after the order.
73 Mike KK7ER
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I got around that by plugging the radio into a little "Honeytone" audio amplifier.
it's available in several colors. I have one in Burgundy. That link is to one in Aqua. It has great sound for its size. If you want to use headphones, you can plug them into the amplifier rather than unplugging from the rig.
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Raj vu2zap
Bob Bennett
Gwen Patton