Date   
Re: Microphony

Jerry Gaffke
 

I've never done it that way, nipping a cold SMD part with a pair of cutters..
Mechanical stresses would be considerable, this never separates copper pad from board?

I generally use two soldering irons, heat both ends simultaneously.
Then pick the part up using the two irons like tweezers.


On Tue, Jan 1, 2019 at 04:06 AM, Peter Russell wrote:
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

Re: Rotary encoder

Peter Russell <peter.russell@...>
 

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: Bitx40

Evan Hand
 

Do you have access to a miniUSB (not micro) cable that you could use to connect the nano to your phone charger (assuming it is USB and not USB C) ?  If so, you could use that to do the power test mentioned in the prior emails.

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

Jerry Gaffke
 

I believe we are talking about the Nano's with the crystals (not ceramic resonators) that Arv found:
    https://groups.io/g/BITX20/message/63203

A couple advantages to the crystals:
  Crystals are generally accurate to 50ppm or so, the resonators accurate to maybe 5000ppm.  100 times worse.
  Crystals are much bigger and easier to hack than the dinky little resonators on the Nano's that come with the Raduino.

On that 16mhz through hole crystal on the Nano's that Arv found, could easily whack it with a pair of dikes,
and solder a different frequency crystal onto the stubs (and then adjust the firmware so timing remains accurate).
Or solder a cap between a crystal pin and ground to pull it off by a few khz.

I've done a lot of work with surface mount.
But would want a binocular microscope and no coffee to do much of anything to the resonator on my Nano.

On the plus side, if you did manage to solder a cap to it, that resonator might be easier to pull off to some other frequency.
I haven't tried that, except that pressing a finger did get it to zip about considerably.

FYI, the 12mhz resonator/crystal on the CH340G USB chip is only active when the Nano is cabled up to a host computer.
So generally doesn't interfere with radio reception, but one end or the other (Raduino or host computer)
could have a 12mhz reference that will interfere with our unshielded 12mhz IF (true for both the uBitx and Bitx40).
If you have a use case where you need the USB port active while using the radio, could leave the CH340G inactive
and have an external USB to 5vTTL UART cable assembly carry out that communication for you.
See the bottom part of this post:   https://groups.io/g/BITX20/message/50027

Jerry, KE7ER




On Tue, Jan 1, 2019 at 08:04 AM, John wrote:
That's what I was thinking. There's nothing time deterministic, and if there was, a cheap GPS would be the way to go (as was done in the KiwiSDR).   At the price point of these, I doubt either of the oscillator references (resonator or crystal) are particularly precise (they can't be paying more than a dime or so for either version in the quantities they're making) and since they're trim- to-spec, they're not buying much. :-)

Temp stability may (or may not) be better, but it's likely a "dont care" for almost all applications. 
John K5MO

Re: RF Amplifier Added #ubitx

LKNDAVE
 

my original intent was to build a rudimentary general coverage receiver. incorporating this circuit with the LO vfo and ad8307 to spot tune the input for best selectivity at a given freq. transmitting and impedance matching was never an issue. if it was i would use a relay. also using a 2 pole 3 pos switch to jump the inductors for different coverage. 

uBITX w/mods & case for sale

PeteWK8S
 

For sale is my early version uBITX with mods in a nice 3D printed case with tilt stand and includes external speaker also in 3D case. No mic as I'm a CW guy. Here are the details: Raduino has 4.7K installed between P2(keyer) and P3(5+v), CW key jack wired P2(Tip)10K and P3(sleeve)2.2K to Raduino P2(works with KD8CEC firmware), BCI filter installed in RX line on PCB, Pot replacing R250 to add VK3ELH mod for TX Pop fix(not installed), added momentary push button replacing tuning encoder push button function, installed NDGT automatic RF Gain (AGC) SMD circuit allowing KD8CEC S-Meter, installed NM0S(Four State Qrp) audio CW filter modded with relay allowing switching out of circuit, replace Green LCD with BLUE LCD, wiring allows easy removal of uBITX for additional mods and etc. All installed in Blue case with Red faceplate. Running KD8CEC v1.107 and getting rated power out...about 12 watts. All working well with no issues.

Price is $125 plus shipping (probably around $15 or so)

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

Evan Hand
 

John,
We are in agreement on not much value to pay extra for crystals.  I did want to clarify the "time" aspect that I referenced above; for that I was thinking of the internal delay functions that are built into the arduino capabilities.  These are based on the clock signal, so varying the clock would distort those timing values.  Vast majority of the time it is not going to make a difference even in that use, as the device cannot respond that quickly.

Happy New Year!
73
Evan
AC9TU

Re: uBITX w/mods & case for sale

Gordon Gibby
 

I’ll take it!



On Jan 1, 2019, at 11:51, PeteWK8S via Groups.Io <pmeier@...> wrote:

For sale is my early version uBITX with mods in a nice 3D printed case with tilt stand and includes external speaker also in 3D case. No mic as I'm a CW guy. Here are the details: Raduino has 4.7K installed between P2(keyer) and P3(5+v), CW key jack wired P2(Tip)10K and P3(sleeve)2.2K to Raduino P2(works with KD8CEC firmware), BCI filter installed in RX line on PCB, Pot replacing R250 to add VK3ELH mod for TX Pop fix(not installed), added momentary push button replacing tuning encoder push button function, installed NDGT automatic RF Gain (AGC) SMD circuit allowing KD8CEC S-Meter, installed NM0S(Four State Qrp) audio CW filter modded with relay allowing switching out of circuit, replace Green LCD with BLUE LCD, wiring allows easy removal of uBITX for additional mods and etc. All installed in Blue case with Red faceplate. Running KD8CEC v1.107 and getting rated power out...about 12 watts. All working well with no issues.<IMG_0667.jpeg>

Price is $125 plus shipping (probably around $15 or so)

JackAl now on Sale

Jack Purdum
 

All:

QRP Guys is ready to take orders for the JackAl support board for the µBITX. A link to a list of its feature set, a video of it in action, and some photos can be seen at

http://hamradiodesigns.com/index.php/photos/

Note that the AGC implements both audio and IF AGC. (The appendix to the manual shows a plot of its characteristics.) DSP filters are available, including user-defined filters (CUST in figure below). A CW keyer and decoder are also included. The main screen looks like this:



The decoded CW can be seen along the bottom. (In all honesty, that is a guy sending almost perfect code at about 22wpm. I'm still playing with the decoder and expect some really smart user to make it much better. It's got real possibilities as it is based on the FFT bin counts.)

QRP Guys is offering the JackAl board for $40 for the first 50 boards. After those are gone, the price will be $50. Shipping in the CONUS is $5 and DX is $15. This is what the JackAl board you'll get looks like:




The board has all of the SMD's mounted (including the Si5351 and the display buffer IC). The user does have to supply additional parts: A Teensy 3.6 and associated audio board (both from PJRC.com) and either a 5" or 7" TFT touch screen display (BuyDIsplay.com). You should also consider case size when you select your display size. (Note: BuyDisplay.com has actual sizes for each display and they are measured like a TV, so the case can be smaller than you think.)  If addition, there are some IC's, connectors, audio isolation xfmrs, and header pins that most of you will want to add. The cost of these additional parts should be less than $15 depending on your junk box. The board with these in place looks like this:




The connectors are not required but, since you are also give about a dozen free I/O pins for experimenting, you may want to add them. (The yellow pins above are test points.) The attached doc file lists the parts needed and their likely cost.

The assembly manual should be online at our web site, probably tomorrow. This is an intermediate to advanced semi-kit project. Our intention is to not only give the µBITX additional capability, but to serve as a platform for experimentation, which we hope you will share with the rest of us. You will have approximately 700K of flash and 200K of SRAM free for your inventive side to exploit. Al and I already have some (software) extensions we want to implement. Note JackAl does NOT fix the harmonic or spur issues. However, our test µBITX's right out of the box were well within spec for 80 and 40 meters and spot on for 20M. (15M and 10M, not so much.) If you have doubts about your µBITX, check it out. It could well be that your favorite band is within spec. (If you don't have a spectrum analyzer, check with members of your club or the physics department of your local high school,. junior college, or university. Most will be glad to help.)

If you have specific questions, rather than take bandwidth here, I'll be posting an "info" email address here, probably later today or tomorrow for sure. In any event, take a peek at JackAl. Al and I think you'll really like what you see.

Jack, W8TEE
Al, AC8GY

Re: uBITX w/mods & case for sale

Jim Miller
 

Hi Pete,

Where did you get the STL files for the case?  

I printed this one, but didn't really care for it.


Thanks,
Jim
AE0BZ


On Tue, Jan 1, 2019 at 10:51 AM PeteWK8S via Groups.Io <pmeier=me.com@groups.io> wrote:
For sale is my early version uBITX with mods in a nice 3D printed case with tilt stand and includes external speaker also in 3D case. No mic as I'm a CW guy. Here are the details: Raduino has 4.7K installed between P2(keyer) and P3(5+v), CW key jack wired P2(Tip)10K and P3(sleeve)2.2K to Raduino P2(works with KD8CEC firmware), BCI filter installed in RX line on PCB, Pot replacing R250 to add VK3ELH mod for TX Pop fix(not installed), added momentary push button replacing tuning encoder push button function, installed NDGT automatic RF Gain (AGC) SMD circuit allowing KD8CEC S-Meter, installed NM0S(Four State Qrp) audio CW filter modded with relay allowing switching out of circuit, replace Green LCD with BLUE LCD, wiring allows easy removal of uBITX for additional mods and etc. All installed in Blue case with Red faceplate. Running KD8CEC v1.107 and getting rated power out...about 12 watts. All working well with no issues.

Price is $125 plus shipping (probably around $15 or so)

Re: Rotary encoder

Jack Purdum
 

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: RF Amplifier Added #ubitx

LKNDAVE
 

**** the 1sv149 is a 0-9 volt device, most often used 0-8 volts.

New sub test

Peter Vouvounas
 

Testing post new group member

 

Tnx

Re: JackAl now on Sale

@ExplodingLemur
 

Starting the new year off right with this great news! Order placed :) I just finished the spectral purity fixes on my uBITx so this is perfect timing.

Re: JackAl now on Sale

Roy Appleton
 

Got mine ordered!😁

Roy
WA0YMH

On Tue, Jan 1, 2019, 11:04 AM Jack Purdum via Groups.Io <jjpurdum=yahoo.com@groups.io wrote:
All:

QRP Guys is ready to take orders for the JackAl support board for the µBITX. A link to a list of its feature set, a video of it in action, and some photos can be seen at

http://hamradiodesigns.com/index.php/photos/

Note that the AGC implements both audio and IF AGC. (The appendix to the manual shows a plot of its characteristics.) DSP filters are available, including user-defined filters (CUST in figure below). A CW keyer and decoder are also included. The main screen looks like this:



The decoded CW can be seen along the bottom. (In all honesty, that is a guy sending almost perfect code at about 22wpm. I'm still playing with the decoder and expect some really smart user to make it much better. It's got real possibilities as it is based on the FFT bin counts.)

QRP Guys is offering the JackAl board for $40 for the first 50 boards. After those are gone, the price will be $50. Shipping in the CONUS is $5 and DX is $15. This is what the JackAl board you'll get looks like:




The board has all of the SMD's mounted (including the Si5351 and the display buffer IC). The user does have to supply additional parts: A Teensy 3.6 and associated audio board (both from PJRC.com) and either a 5" or 7" TFT touch screen display (BuyDIsplay.com). You should also consider case size when you select your display size. (Note: BuyDisplay.com has actual sizes for each display and they are measured like a TV, so the case can be smaller than you think.)  If addition, there are some IC's, connectors, audio isolation xfmrs, and header pins that most of you will want to add. The cost of these additional parts should be less than $15 depending on your junk box. The board with these in place looks like this:




The connectors are not required but, since you are also give about a dozen free I/O pins for experimenting, you may want to add them. (The yellow pins above are test points.) The attached doc file lists the parts needed and their likely cost.

The assembly manual should be online at our web site, probably tomorrow. This is an intermediate to advanced semi-kit project. Our intention is to not only give the µBITX additional capability, but to serve as a platform for experimentation, which we hope you will share with the rest of us. You will have approximately 700K of flash and 200K of SRAM free for your inventive side to exploit. Al and I already have some (software) extensions we want to implement. Note JackAl does NOT fix the harmonic or spur issues. However, our test µBITX's right out of the box were well within spec for 80 and 40 meters and spot on for 20M. (15M and 10M, not so much.) If you have doubts about your µBITX, check it out. It could well be that your favorite band is within spec. (If you don't have a spectrum analyzer, check with members of your club or the physics department of your local high school,. junior college, or university. Most will be glad to help.)

If you have specific questions, rather than take bandwidth here, I'll be posting an "info" email address here, probably later today or tomorrow for sure. In any event, take a peek at JackAl. Al and I think you'll really like what you see.

Jack, W8TEE
Al, AC8GY

Re: Rotary encoder

Scott McDonald
 

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: Rotary encoder

Albert Peter
 

The short answer is YES.  I am using a nice Bournes optical.  The connections on the JackAl PCB have +5 V available and the system seems plenty fast for normal tuning.

Al

 

Sent from Mail for Windows 10

 

From: Scott McDonald via Groups.Io
Sent: Tuesday, January 1, 2019 1:05 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Rotary encoder

 

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: Rotary encoder

Scott McDonald
 

Thanks Al.  There could be no better short answer.  It’s great the Day of the JackAl has arrived.

73 Scott

Make something good happen!

On Jan 1, 2019, at 12:33 PM, Albert Peter <albertfpeter@...> wrote:

The short answer is YES.  I am using a nice Bournes optical.  The connections on the JackAl PCB have +5 V available and the system seems plenty fast for normal tuning.

Al

 

Sent from Mail for Windows 10

 

From: Scott McDonald via Groups.Io
Sent: Tuesday, January 1, 2019 1:05 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Rotary encoder

 

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
>
>
>
>
>


 

<D9FB333EE2C44A1B998A522EA076CF9E.png>
<D0ED921D3A0E499FBFCAC0B0CCEE1EE5.png>

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

Brian Bowling
 

Thanks very much for this info Jim.  Anyone know why the kit ships with a stereo jack at all if it only uses it as a mono?  Just a matter of price/cost?
--
73,

Brian - N8BDB

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

Robert Sears
 

Thank you for the great post.

I just got a v4 for X-mas, how much of this also applies to the v4?

Thanks, Robert