Date   

Re: Bitx40

Paul KL7FLR
 

Each of the header pins has pin #1 designated with a square solder pad.  The 16 pins header (P3) has pin 16 closest to RV1 contrast control. The plug will have the yellow wire on pin 16.

I would suggest you stop at your local library that offers public computer access and print out all the information on the Bitx40, the circuit description, the schematic and the wire up instruction. Will make it a whole lot easier for you to understand the operation of the Radio when you have hard copy to refer to. Plus when implementing any mods it will sure help to see the whole picture.

Paul

KL7FLR


Re: power and mic wiring

Bob Lunsford
 

Original caps are indeed "unobtanium" but replacement caps
are worlds ahead of the old technology. I had a Swan 350
about ten years ago that I bought at a hamfest. Plugged it in
and the power supply caps were beyond saving and one
blew up and it sounded like a shotgun shell going off.

There are some who advise putting a variable AC transformer
in the circuit and bringing it up slowly "to polarize the caps" but
while this may work, better is to do as suggested: Make a list
of the electrolytic caps and plan on replacing them.

Some have suggested putting a 100-250 W lamp i series with
the AC so the AC is limited. Might try it but it is a trial and error
situation where error is most likely and proves to be a waste of
time.

I had a Philco 650 back in the '50s that had a shorted bypase
cap on the power output tube from screen to ground. It was not
an electrolytic. This proves that it could be any cap. The electro-
lytics are polarity sensitve and putting one in backwards as far
as polarity is concerned is like inviting a short and immediate
failure.

Go slow, take your time. Some of those old radios were superb
as was the Philco I had.

Bob — KK5R

--------------------------------------------

On Tue, 1/1/19, Mike Lichtman via Groups.Io <tchrme=aol.com@groups.io> wrote:

Subject: Re: [BITX20] power and mic wiring
To: BITX20@groups.io
Date: Tuesday, January 1, 2019, 8:23 PM

Eiclan,
    On the 30’s radio,
replace all the caps (especially the electrolytics) 
before powering up again or you may burn up the power
transformer. They are usually “unobtanium”. 73 Mike
KF6KXG


Re: power and mic wiring

Mike Lichtman
 

Eiclan,
On the 30’s radio, replace all the caps (especially the electrolytics) before powering up again or you may burn up the power transformer. They are usually “unobtanium”. 73 Mike KF6KXG


Re: uBITX Wireup Diagrams on the HF SIGNALS WEBSITE ARE WRONG!! #ubitx #ubitx-help

Bob Lunsford
 

Another problem with putting a mono plug into a stereo jack is
that the two circuits in the jack relate to ch1 and ch2 and by it
being a mono plug with no "ring" on it, one of the channels is
shorted out. This could damage the amp, depending on amp
design. Some designers put the two earphones in series and
some put them in parallel. The uBitX uses parallel earphone
connections.

You can use an adapter or just get a cheep set of earphones.
Check Dollar Tree for many of devices we frequently use. For
what they are, it's the cheapest way, I find. Even cheaper than
Walmart. I'm guessing Walmart will buy out Dollar Tree someday.

Bob — KK5R

--------------------------------------------

On Tue, 1/1/19, Jerry Gaffke via Groups.Io <jgaffke=yahoo.com@groups.io> wrote:

Subject: Re: [BITX20] uBITX Wireup Diagrams on the HF SIGNALS WEBSITE ARE WRONG!! #ubitx #ubitx-help
To: BITX20@groups.io
Date: Tuesday, January 1, 2019, 5:27 PM

Pretty much all of the
headphones available today are stereo.
Plug
one of those into a mono jack and you only get one
earfull


On
Tue, Jan 1, 2019 at 10:56 AM, Brian Bowling wrote:

Anyone know why the kit ships with a stereo jack
at all if it only uses it as a mono?


Re: uBITX 3D case

Jim Miller
 

Very nice, thank you so much Pete.  Since he used a modular design, I can modify a front panel I made for my Bitx40 with Fusion360.  I was also thinking of using aluminum foil tape to try and have some sort of RF shielding.

Thank you again and 73,
Jim
AE0BZ



On Tue, Jan 1, 2019 at 2:10 PM PeteWK8S via Groups.Io <pmeier=me.com@groups.io> wrote:
Hi Jim,

I used this one https://www.thingiverse.com/thing:2774133  like you I didn't like one you mention.  I modified his front panel https://www.thingiverse.com/thing:2774133 moving the top 3 holes for my needs. I moved the encoder hole so I could use a larger knob. The push button and switch holes were drilled. I printed a number of front panels until I got it right. :-)

Pete 


Re: fyi

Robert Evans
 


Re: Microphony

Bob Lunsford
 

I saw a hint about removing SMD devices some time ago.

If you do not have any tools for removing them, here is
the hint:

First, use a solder-sucker or wicking and remove any
excess solder. Then loop a #28 or so enameled wire under
the device and while heating the end, pull the wire out which
causes a gap at the end where heat is applied. Then you
can heat the other end and it will be easy to remove the
device.

I also wondered about snapping the device in two but was
worried that the stress could lift the pad/s. So far I have not
found it necessary to remove any SMD device but now you
have another suggested method for doing it.

Bob — KK5$


--------------------------------------------

On Tue, 1/1/19, Peter Russell <peter.russell@...> wrote:

Subject: [BITX20] Microphony
To: BITX20@groups.io
Date: Tuesday, January 1, 2019, 7:06 AM

Cured!
turned out to be C50 in the audio pre
amp.
replaced it with a leaded
electrolytic.

A little tip - for those who need it!
If you know that you are going to
replace a smd capacitor or resistor, I
find the easiest way to remove them is
to take a pair of small cutters
and cut the component in half.
Then, with a pair of tweezers, it's
easy to unsolder the two ends.

Peter G8FWY

---
This email has been checked for viruses
by AVG.
https://www.avg.com


Re: Nextion Displays >> warning

Mark M
 

I believe the KD8CEC firmware will support the TJC displays. Look on hamskey.com for the files.

73...    Mark    AA7TA


Re: uBITX 3D case

Mark M
 

Here's another nice one (not my design). And a remote head option as well. 

https://www.thingiverse.com/thing:2925336

I printed the remote head bits but haven't decided where to go from there. I have the uBitX in one of Sunil's cases. I'm thinking of printing a replacement front panel for it, maybe for the remote head or perhaps for a 3.5" display. Or both.  ;)

73...    Mark   AA7TA


Re: Nextion Displays >> warning

Andrew Mason
 

Just confirming Glenn's warning.

"The Nextion editor does not allow them to be uploaded with files.  Apparently there was supposed to be a way, with some previous versions of the Nextion Editor which I found and also tried, but to no avail.

So a warning about using 'Nextion" displays, but actually shown as TJC types, they should not be purchased.  Unfortunately ebay (as usual) sellers do not tell us this. Some don't even show the part number on the back in a picture."

I purchased what was advertised as a Nextion off eBay, it was in fact a TJC.  The picture below shows how far you will get when trying to load the file.  

A genuine Nextion has now been orderd.

73
Andrew
VK4JAM


Re: uBITX Wireup Diagrams on the HF SIGNALS WEBSITE ARE WRONG!! #ubitx #ubitx-help

Jerry Gaffke
 

Pretty much all of the headphones available today are stereo.
Plug one of those into a mono jack and you only get one earfull


On Tue, Jan 1, 2019 at 10:56 AM, Brian Bowling wrote:
Anyone know why the kit ships with a stereo jack at all if it only uses it as a mono? 


Re: Rotary encoder

Jack, W8TEE
 

I see Al already answered this. I, too, have used a hi-rez optical with JackAl, but dropped back to a "detent" encoder. Don't ask me why, but I kinda like the feedback feel I get with a detent encoder. Since the Teensy is 10x faster than the Nano, I think you'd have to be tuning with a Dremel to tune it too fast.

Jack, W8TEE

On Tuesday, January 1, 2019, 1:05:08 PM EST, Scott McDonald via Groups.Io <ka9p@...> wrote:


Jack, as long as we're talking encoders, will JackAl be able to easily handle some of the higher resolution optical encoders?  My understanding of this is very limited, but I did the experiment using a really sweet surplus Bourn optical encoder with some CEC software, and the Nano couldn't keep up with the encoder, a problem I think I now might understand has to do with the way interrupts aren't used in most uBITX code? (think is a euphemism in that context though, I'm still on Chapter 4 of your book :) .
 
Thanks, and congrats on the launch, HNY.
 
Scott ka9p
 
 
-----Original Message-----
From: Jack Purdum via Groups.Io <jjpurdum@...>
To: BITX20 <BITX20@groups.io>
Sent: Tue, Jan 1, 2019 11:21 am
Subject: Re: [BITX20] Rotary encoder

Not really, the parts per revolution is something I'd look at, since most are around 20-25ppr. Matching this with the other encoders you are using probably makes sense. Encoders with detents will probably be less expensive. Buy a bunch, as the price drops like a stone on eBay for multiples. You can always sell them to club members or use them in your own stuff. Also, some have small boards attached (e.g., KY-040) and may have pullup resistors on them. You can take them off if required or, in some cases, change the pinMode() not to use INPUT_PULLUP as its parameter in the software. Since it's pretty hard to "hurt" anything in software, grab what you can find and give it a try.

Jack, W8TEE

On Tuesday, January 1, 2019, 11:27:17 AM EST, Peter Russell <peter.russell@...> wrote:


Thanks Jack.
Is there a particular type or spec that I should look for?

Peter.

On 01/01/2019 15:34, Jack Purdum via Groups.Io wrote:
> First, try moving the encoder leads and see if it has an impact. If that
> fails, try a Bourne (or better type) encoder. If that fails, see if you
> can find a reasonably-priced optical encoder. I'm no EE, but these might
> help.
>
> Jack, W8TEE
>
> On Tuesday, January 1, 2019, 7:11:00 AM EST, Peter Russell
> <peter.russell@...> wrote:
>
>
> Another little problem.
> I'm finding that the rotary encoder is generating quite a bit of noise.
> I can hear every 'tick' when I turn it.
> Is this normal, or have I got a bad un?
>
> I don't have any experience of rotary encoders, but this one seems a bit
> 'flimsy'.
> I would have expected something a bit more substantial - or is this just
> me being a bit picky?
>
> Peter G8FWY
>
> ---
> This email has been checked for viruses by AVG.
> https://www.avg.com
>
>
>
>
>




Re: JackAl now on Sale

Jack, W8TEE
 

For the isolation xfrms, this is what I used:

eBay: 162821858509

Jack, W8TEE

On Tuesday, January 1, 2019, 3:26:38 PM EST, Fast hosts <keith@...> wrote:


All ordered and all the extra parts barring a couple of IDC connectors are ready in my project box .. 


On 1 Jan 2019, at 19:31, Mark Hatch <mark2382@...> wrote:

Me too! Looking forward to it.

If it would be possible for you to add some Ebay auction number or mouser for a couple of the parts. Saw the numbers for  

6 Pin, dual row (2x3) IDC male and female connectors.  eBay # 170938704657 
Believe the 10 pin is  ebay#321950106177
Audio isolation transformers, 600 ohm, 1:1    - need correct size for the PCB - lots of different configurations of these out there. ebay # 401648297324

But wasn't sure on the TDA7226M 6w (found some 7w...)

Also on the PJRC products:
1. Assume that the Teensy 3.6 is with pins
2. Audio board is the "Audio Adapter Board": https://www.pjrc.com/store/teensy3_audio.html

Thanks!

Mark

--
Keith Baker - Communications technician (retired)


Re: nanos on sale at banggood for $2.39 USD #arduino #nano

Vince Vielhaber
 

When it comes to the nano, I buy them from Tayda. They're a little more, but they come with the cable and I get 'em in about a week (plus or minus a couple of days). Tayda has them for 3.79, compare to Banggood's 2.39 + 1.29 for their cheapest cable. Then factor in the shipping time. Even thru the US warehouse it'll take a week or more.

Vince - K8ZW.

On 01/01/2019 04:37 AM, Snowist wrote:
No need to reming but if you want to buy something from Ali or similar
Chinese store look at the store points and products sold quantity.
Personally I prefer it should be min 50+ sales before clicking on buy
button.

Yes, suggested Robodin store is good to go with 1830 sales so far with
micro usb interface but shipping cost will apply. It is good with Quartz
resonator.
https://tr.aliexpress.com/item/Nano-V3-ATmega328-CH340G-Micro-USB-Pin-headers-NOT-soldered-Compatible-for-Arduino-Nano-V3-0/32664577152.html

If you want to keep your Nano away from main uBitx Radionu borad this is
interesting one
https://www.aliexpress.com/item/Atmega328P-Nano-V3-0-3-0-CH340G-CH340-Driver-Terminal-Adapter-Expansion-Board-Micro-Controller-Module/32847163727.html
<https://tr.aliexpress.com/item/Atmega328P-Nano-V3-0-3-0-CH340G-CH340-Driver-Terminal-Adapter-Expansion-Board-Micro-Controller-Module/32847163727.html?spm=a2g10.10010108.1000016.1.552b185fcd1630&isOrigTitle=true>


Re: JackAl now on Sale

Fast hosts
 

All ordered and all the extra parts barring a couple of IDC connectors are ready in my project box .. 


On 1 Jan 2019, at 19:31, Mark Hatch <mark2382@...> wrote:

Me too! Looking forward to it.

If it would be possible for you to add some Ebay auction number or mouser for a couple of the parts. Saw the numbers for  

6 Pin, dual row (2x3) IDC male and female connectors.  eBay # 170938704657 
Believe the 10 pin is  ebay#321950106177
Audio isolation transformers, 600 ohm, 1:1    - need correct size for the PCB - lots of different configurations of these out there. ebay # 401648297324

But wasn't sure on the TDA7226M 6w (found some 7w...)

Also on the PJRC products:
1. Assume that the Teensy 3.6 is with pins
2. Audio board is the "Audio Adapter Board": https://www.pjrc.com/store/teensy3_audio.html

Thanks!

Mark

--
Keith Baker - Communications technician (retired)


Re: uBITX 3D case

PeteWK8S <pmeier@...>
 

Hi Jim,

I used this one https://www.thingiverse.com/thing:2774133  like you I didn't like one you mention.  I modified his front panel https://www.thingiverse.com/thing:2774133 moving the top 3 holes for my needs. I moved the encoder hole so I could use a larger knob. The push button and switch holes were drilled. I printed a number of front panels until I got it right. :-)

Pete 


Re: Bitx40

ae1ct1998 <AE1CT1998@...>
 

Tried the mini plug on the raduino but made no differance. All I can think of is that the display had an 8 pin plug and 16 male pins which, I'm suppose to put power to the orange and black wire but which of the 16 pins does the plug go on. The wiring diagram doesnt say or show. I've probably got the plug on the wrong set of pins.


Re: My list of mods and Chronology of Installation #ubitx

Daniel Conklin <danconklin2@...>
 

Robert,
Probably everything is the same except the audio section, which was changed in V4.
Daniel


Re: DSP cheap for qrp

giuseppe callipo
 

Josh, 
thanks to the interest in the project and the checks, they are very interesting and I will have to do some experiments. Certainly the JackAl board is very interesting and complete is a serious product mature and with more functionality, while mine is a simple experimentation on the techniques used in today's modern RTX. I was intrigued by the DNR of spectral subtraction and I decided to experiment a bit ', I will continue following this path, the main goal is always to get the best with the least effort and cost, also get solutions not related to a particular vendor, finally the results obtained must be open source and within the reach of any experimenter, which is why I prefer to identify pre-assembled modules. I am interested in the exchange of experiences, and any contribution is always welcome.
Returning to the project, currently I think to complete this first release adding at most a cw decoder, it would be interesting to study some routines, and a small container with 3d printing project, this will allow you to get a small module to connect between RTX and headset to add to older or self-built devices some nice DSP features to see and hear, all achievable with a cost of less than 15 or 20 dollars by purchasing simple modules. It's a bit extreme philosophy but it's a fun challenge.  Free, simple and for all.
I can understand your experience, I will ask you for some advice in the future if you allow it.
OK, see you soon.
Giuseppe. Ik8yfw
 


Re: JackAl now on Sale

Mark Hatch
 

Me too! Looking forward to it.

If it would be possible for you to add some Ebay auction number or mouser for a couple of the parts. Saw the numbers for  

6 Pin, dual row (2x3) IDC male and female connectors.  eBay # 170938704657 
Believe the 10 pin is  ebay#321950106177
Audio isolation transformers, 600 ohm, 1:1    - need correct size for the PCB - lots of different configurations of these out there. ebay # 401648297324

But wasn't sure on the TDA7226M 6w (found some 7w...)

Also on the PJRC products:
1. Assume that the Teensy 3.6 is with pins
2. Audio board is the "Audio Adapter Board": https://www.pjrc.com/store/teensy3_audio.html

Thanks!

Mark