Date   
Re: Keyer for ubitx #ubitxcw

Kelly Mabry
 

Sam, thank you. This is going to make or break my decision to sell. If this works, great I will soldier on... if not, then ...well you know. I anxiously  await your help. I have even thought about paying for someone to correct my mistakes  but  that is not the amateur radio way. I know that it is better to persevere than to give up, so I am still here. 
Thanks again!
73,

Kelly KD5AJ 

Re: VU Meter from Sunil

AA9GG
 

No.  But thank you for turning me on to them.  They have some beautiful cases!!!  Not only metal, but pre-cut for the BitX and uBitX (including TTF displays of all sizes)


On Mon, May 27, 2019 at 8:14 PM Curt via Groups.Io <wb8yyy=yahoo.com@groups.io> wrote:
some of us may be applying a VU meter that was shipped with a front panel from Amateur Radio kits India.  I am thinking it may be around 250 uA but I am not sure -- I am also seeking the resistance of the movement as I may need to employ a current shunt.  anyone have any info on it?  if its marked on the meter outside, I have some disassembly to get to it. 

73 Curt



--
Paul Mateer, AA9GG
Elan Engineering Corp.
www.elanengr.com

Re: VU Meter from Sunil

AA9GG
 

D'Oh...I just now noticed it's listed right there in the groups footer...


On Mon, May 27, 2019 at 10:52 PM Paul Mateer <paul.aa9gg@...> wrote:
No.  But thank you for turning me on to them.  They have some beautiful cases!!!  Not only metal, but pre-cut for the BitX and uBitX (including TTF displays of all sizes)


On Mon, May 27, 2019 at 8:14 PM Curt via Groups.Io <wb8yyy=yahoo.com@groups.io> wrote:
some of us may be applying a VU meter that was shipped with a front panel from Amateur Radio kits India.  I am thinking it may be around 250 uA but I am not sure -- I am also seeking the resistance of the movement as I may need to employ a current shunt.  anyone have any info on it?  if its marked on the meter outside, I have some disassembly to get to it. 

73 Curt



--
Paul Mateer, AA9GG
Elan Engineering Corp.
www.elanengr.com



--
Paul Mateer, AA9GG
Elan Engineering Corp.
www.elanengr.com

Re: 2N3866

Ashhar Farhan
 

I used those on my first tranceiver they are a great device!

- f

On Tue, May 28, 2019 at 7:10 AM N7QL <n7ql.us@...> wrote:
Has anyone tried using a 2N3866 for Q1? If so how well did it work? I might try experimenting with it since I will get two in the lot I am ordering on Ebay. Thank you.

Re: Antuino

Ashhar Farhan
 

Bruce, it is possible that there is too much gain. You can remove R8 (2.2K) resistor that provides feedback to the Q1 transistor to switch off that stage and use a 0.1uf capacitor between C11 and C7 to bypass that stage. you will have to rerun the return loss recalibration routine before you can accurate readings. I will try these out at my end too.

- f 

On Tue, May 28, 2019 at 2:20 AM Bruce Hall <bhall66@...> wrote:
All,

Does anyone see gain compression at the higher dBm levels?  Or does everyone else see a linear response on their units?  I have been adding 20-30 dB of attenuation to get into the linear part of the curve, but this significantly reduces the useful range of the device.

I am wondering if there is too much amplification in the IF section.   What would be a good method to troubleshoot?

Bruce


On Wed, May 22, 2019 at 8:48 PM Bruce Hall via Groups.Io <bhall66=gmail.com@groups.io> wrote:
I took a few more measurements, adding in 3dB and 6dB steps at higher attenuation values.  It looks like the additional 3dB and 6dB steps are attenuating RF appropriately.  But the shape of the graph remains non-linear.   See attached.   

I am not sure what to try at this point; any suggestions?

Bruce



On Wed, May 22, 2019 at 3:35 AM Ashhar Farhan <farhanbox@...> wrote:
This is interesting. There could be two possible explanations:
1. There is gain compression. This is possible due to the two stage IF amplifiers.
2. The step attenuator is off-calibration.

One way to know is to measure readings of smaller attenuations at different attenuations. For instance how does the readings change between -50db and -53db as opposed to -10 and -13 db? My tests show quite linear relationship between actual attenation and db readings.

- f

On Wed 22 May, 2019, 6:06 AM Bruce Hall, <bhall66@...> wrote:
I have been playing around with the Anduino.   I inserted a step-attenuator between the RF input and RF output ports.  With no in-line attenuation, the measured RF output is -16 dBm.   As I added attenuation, the measured RF power predictably decreased.   The receiver bottoms out at roughly -70 dBm, and does not record levels any lower - which makes sense.  What I don't understand is the non-linear relationship at low levels of attenuation.  For instance, adding 3dB, 6dB, or even 12 dB of attenuation did not significantly change the Antduino's displayed power measurement.  Independently, I crudely measured the RF power using my oscilloscope, and the power output changes as expected.   I am curious what results others get with their units.    Why am I getting a non-linear relationship between attenuation and RF power?

On Tue, May 21, 2019 at 7:52 PM Ashhar Farhan <farhanbox@...> wrote:
Peeps,
I just landed back home an hour ago. I will start putting the documentation for the antuino together tomorrow.

- f

On Wed 22 May, 2019, 4:12 AM Glenn, <glennp@...> wrote:
Rob i had issue with fonts also.   I still can't find the correct glcd LIB either, did you?.

Keep in mind I am a novice at this but do have Jacks book.

What i think it should be is to have all the Fonts in a directory called "fonts". Fonts.h is just a list of the fonts used in the Sketch.
in the same directory as the sketch.

then change #include <fonts/allFonts.h> to "fonts/allFonts.h"   so when you run the sketch in the IDE, it gets the fonts from the sub directory /fonts

I have another problem though in that i can't find a zipped version of the fonts required to download. 

I found the fonts here https://github.com/johnmccombs/arduino-libraries/tree/master/glcd/fonts
But if I right click on each entry  "Save As" the downloaded files have extra characters in them making them unusable.

glenn
vk3pe







On Tue, May 21, 2019 at 11:53 PM, Rob Bleumer wrote:
Ho Ashhar
Same question from me and I got also problems with the line containing fonts/allFonts.
Perhaps part of the same.
Rob PA0RBL

Re: VU Meter from Sunil

Ian Reeve
 

I recently purchased a Amateur Radio Kits case for nextion screen.Arrived very quickly and was amazed to find it came with brackets and panels,wiring looms,speaker,audio and and agc board.The case is beautifully made and is punched for the display and s meter etc.I find the meter strange with centre zero so would not use it and I found the aperture for the nextion to be too big for my screen.I made up two short aluminium strips drilled to fit the nextion screen and offered up the assembly to the case front panel.Carefully centered the display and marked through the front panel and drilled the spacer strips.Finally cut some Matt black textured card to fit the display screen through and a very pleasing result indeed.  Ian M0IDR


From: BITX20@groups.io <BITX20@groups.io> on behalf of AA9GG <paul.aa9gg@...>
Sent: Tuesday, May 28, 2019 4:55:15 AM
To: BITX20@groups.io
Subject: Re: [BITX20] VU Meter from Sunil
 
D'Oh...I just now noticed it's listed right there in the groups footer...

On Mon, May 27, 2019 at 10:52 PM Paul Mateer <paul.aa9gg@...> wrote:
No.  But thank you for turning me on to them.  They have some beautiful cases!!!  Not only metal, but pre-cut for the BitX and uBitX (including TTF displays of all sizes)


On Mon, May 27, 2019 at 8:14 PM Curt via Groups.Io <wb8yyy=yahoo.com@groups.io> wrote:
some of us may be applying a VU meter that was shipped with a front panel from Amateur Radio kits India.  I am thinking it may be around 250 uA but I am not sure -- I am also seeking the resistance of the movement as I may need to employ a current shunt.  anyone have any info on it?  if its marked on the meter outside, I have some disassembly to get to it. 

73 Curt



--
Paul Mateer, AA9GG
Elan Engineering Corp.
www.elanengr.com



--
Paul Mateer, AA9GG
Elan Engineering Corp.
www.elanengr.com

Re: Missing some of the functions in the control panel on the 3.5 Nextion #bitx20 #nextion #smeter

Dale Fagan
 

Hi Sam
Thanks for that it is all working I want to have a go at adjusting the display myself and customising the colors to suit my taste But once I have it in its case.

Dale

Re: text labelson faceplate of rig

_Dave_ K0MBT
 

I like the stealth mode on my ubitx radios. You have to know how to use it. I have the same thing on the gear shift of my car. No labels. When I was a kid I took off all the labels off of everything.

Re: VU Meter from Sunil

Curt
 

Okay I solved this one with a little research on meter movements.  I learned that a uA meter has a relatively high resistance, so that a DVM should not peg it.  On the 20k setting I got a little deflection - and a resistance of 484 ohms. 

73 Curt

Re: VU Meter from Sunil

Mark Hatch
 

Curt,

If you are able to get this to work without installing Sunil's AGC and Volume amplifier, can you share how you did it? Right now I have an open slot in my case where the VUE meter should go and would love to install it. I am just not sure I want to buy in to Sunil's AGC to make it work.

And they are great cases. Just the parts you get with the cases makes it worthwhile. I am planning on doing a MarkAl mod and originally bought the 7" display. But now, I am reconsidering the 5" just so that i can buy one of Sunil's cases!

73
Mark
AJ6CU

Multiple Nextions *AND* Standalone Signal Analyzer (KD8CEC)

Mark Hatch
 

A couple of KD8CEC's mods have got me wondering whether it is possible to run Multiple Nextion's *and* his standalone signal analyzer simultaneously? I am guessing that I would have to import both "yellow" wires into the standalone processor. (But I am not sure of this...)

Anybody done this? Any suggestions on the interconnect?

Would certainly make testing different sized Nextion screens easier (i.e., could run both a 3.2 and a 5" and look for differences in the UX that need to be resolved in the .hmi file)

73
Mark
AJ6CU

Re: VU Meter from Sunil

Joe Puma
 

Couldn’t you create the same this with a voltage amp, even the same LM(I forgot the type) chip that comes with the AGC? Also, there is a transistor in that circuit probably to increase current” its a real simple circuit, very easy to reproduce. 

Joe
KD2NFC

On May 28, 2019, at 10:15 AM, Mark Hatch <mark2382@...> wrote:

Curt,

If you are able to get this to work without installing Sunil's AGC and Volume amplifier, can you share how you did it? Right now I have an open slot in my case where the VUE meter should go and would love to install it. I am just not sure I want to buy in to Sunil's AGC to make it work.

And they are great cases. Just the parts you get with the cases makes it worthwhile. I am planning on doing a MarkAl mod and originally bought the 7" display. But now, I am reconsidering the 5" just so that i can buy one of Sunil's cases!

73
Mark
AJ6CU

Re: VU Meter from Sunil

Curt
 

Mark and Joe

Thanks for email. I will share what I learn, as I stumble. I built 2 copies of nd6t AGC, could not get them to do much with my v4. I went back to the vk3ye agc, it works wonderful once its properly integrated. Then I built the s-meter circuit from sprat that's on the web. I should have known because the vk3ye agc pulls down the signal at the volume control input, it's futile to connect that circuit there for me. Yes we need to grab the full signal before its attenuated.

Vk3ye measures current in parallel with the LED. Pretty worthless except to move the meter. But noting led brightness is in proportion to signal, I will try to measure series current. Yes all this started when I was gifted a front panel with the meter. I like the white panel, so now the meter must become useful.

I will use that sprat s meter circuit for some project. Its easy to find on the web. I just don't readily see it functioning with a ubitx with agc.

Curt

Re: Keyer for ubitx #ubitxcw

Sam Tedesco
 

http://ubitx.net/2018/07/31/glitch-on-cw-keying-on-ubitx/

I lifted r52, on side towards 2822 chip, add diode in series...cathode down to board (ver 3 board). This took out all extra characters for paddles and key.

On my 3.5" sunil case, I left the key alone on front panel and ran the paddle circuit on the rear daughter board. On the pic, you can just see the two resistors on the daughter board come together and are ran under the main board to the front panel. I soldered the wire to the pull up resistor on the side away from the key input.

If you want to run paddles up front, you have to cut a trace on Sunil's front input board...I have not done this.

Re: Keyer for ubitx #ubitxcw

Kelly Mabry
 

Hi Sam! Thanks for the response. I will look into this and have a go at it!
My board is a V5, but I am willing to try anything at this
Point.

73, 
Kelly  KD5AJ 

Re: Keyer for ubitx #ubitxcw

Joe Puma
 

Hi Sam, do you hear your mic audio in your speakers with that amp and also not having much shielding on the wires. or do you just do CW with your rig?

Joe

On May 28, 2019, at 11:25 AM, Sam Tedesco <stedesco619@...> wrote:

http://ubitx.net/2018/07/31/glitch-on-cw-keying-on-ubitx/

I lifted r52, on side towards 2822 chip, add diode in series...cathode down to board (ver 3 board). This took out all extra characters for paddles and key.

On my 3.5" sunil case, I left the key alone on front panel and ran the paddle circuit on the rear daughter board. On the pic, you can just see the two resistors on the daughter board come together and are ran under the main board to the front panel. I soldered the wire to the pull up resistor on the side away from the key input.

If you want to run paddles up front, you have to cut a trace on Sunil's front input board...I have not done this. <IMG_20190402_053934.jpg>

Re: VU Meter from Sunil

Mark Hatch
 

Curt,

For whats is worth, I believe that the issue with nd6t (version sold from kits-project.com) and V4 has been addressed. Since that is an IF solution vs what looks iike (in my very ignorant knowledge) I had planned on using that instead of the volume based AGC that Sunil's kits provided. Have you been in touch with kits-projects to check in?

73
Mark
AJ6CU

Re: Keyer for ubitx #ubitxcw

Sam Tedesco
 

I pretty much only run cw...but, I don't recall hearing any audio in my speakers. I only ran a few tests with the mic to make sure it wasn't overdriven with the linear hooked up. All was good...

@kelly, I took a quick peek at the schematic and it looks like the resistor is the same number on v5. I'll get a pic later, if you need one.

Re: uBitx Opto Coupler / VFO not working #ubitx-help #ubitx

rnharp@...
 

I had the same problem. I fixed it by doing the following: After tripple verifying that the wiring was correct I removed the encoder from the chassis, and sanded the metal bare on the inside of the chassis; cleaned the inside of the power port with contact cleaner, and disconnected/ reconnected the leads on the batteries. I still only show 2v on the red pin, but the encoder tunes now, all menu functions work, tests with a dummy load show I get 10w out on 80/ 40m  4-7 watts on other bands. As I did all three "fixes" at the same time I dont know which one or combination fixed the issue

Re: Antuino

Charles Agosti
 

I had no power up on mine .found two reasons 1 battery holder not making contact on + battery tips and cold a solder joint from external DC input jack and battery cable header .Best to reflow these points.

Unit works well in VSWR mode in fact it works better than my $400.00 comet unit that gets overloaded by nearby FM radio station @96.5 MHz in my backyard....
Wd8axa

On Tue, May 28, 2019, 2:06 AM Ashhar Farhan <farhanbox@...> wrote:
Bruce, it is possible that there is too much gain. You can remove R8 (2.2K) resistor that provides feedback to the Q1 transistor to switch off that stage and use a 0.1uf capacitor between C11 and C7 to bypass that stage. you will have to rerun the return loss recalibration routine before you can accurate readings. I will try these out at my end too.

- f 

On Tue, May 28, 2019 at 2:20 AM Bruce Hall <bhall66@...> wrote:
All,

Does anyone see gain compression at the higher dBm levels?  Or does everyone else see a linear response on their units?  I have been adding 20-30 dB of attenuation to get into the linear part of the curve, but this significantly reduces the useful range of the device.

I am wondering if there is too much amplification in the IF section.   What would be a good method to troubleshoot?

Bruce


On Wed, May 22, 2019 at 8:48 PM Bruce Hall via Groups.Io <bhall66=gmail.com@groups.io> wrote:
I took a few more measurements, adding in 3dB and 6dB steps at higher attenuation values.  It looks like the additional 3dB and 6dB steps are attenuating RF appropriately.  But the shape of the graph remains non-linear.   See attached.   

I am not sure what to try at this point; any suggestions?

Bruce



On Wed, May 22, 2019 at 3:35 AM Ashhar Farhan <farhanbox@...> wrote:
This is interesting. There could be two possible explanations:
1. There is gain compression. This is possible due to the two stage IF amplifiers.
2. The step attenuator is off-calibration.

One way to know is to measure readings of smaller attenuations at different attenuations. For instance how does the readings change between -50db and -53db as opposed to -10 and -13 db? My tests show quite linear relationship between actual attenation and db readings.

- f

On Wed 22 May, 2019, 6:06 AM Bruce Hall, <bhall66@...> wrote:
I have been playing around with the Anduino.   I inserted a step-attenuator between the RF input and RF output ports.  With no in-line attenuation, the measured RF output is -16 dBm.   As I added attenuation, the measured RF power predictably decreased.   The receiver bottoms out at roughly -70 dBm, and does not record levels any lower - which makes sense.  What I don't understand is the non-linear relationship at low levels of attenuation.  For instance, adding 3dB, 6dB, or even 12 dB of attenuation did not significantly change the Antduino's displayed power measurement.  Independently, I crudely measured the RF power using my oscilloscope, and the power output changes as expected.   I am curious what results others get with their units.    Why am I getting a non-linear relationship between attenuation and RF power?

On Tue, May 21, 2019 at 7:52 PM Ashhar Farhan <farhanbox@...> wrote:
Peeps,
I just landed back home an hour ago. I will start putting the documentation for the antuino together tomorrow.

- f

On Wed 22 May, 2019, 4:12 AM Glenn, <glennp@...> wrote:
Rob i had issue with fonts also.   I still can't find the correct glcd LIB either, did you?.

Keep in mind I am a novice at this but do have Jacks book.

What i think it should be is to have all the Fonts in a directory called "fonts". Fonts.h is just a list of the fonts used in the Sketch.
in the same directory as the sketch.

then change #include <fonts/allFonts.h> to "fonts/allFonts.h"   so when you run the sketch in the IDE, it gets the fonts from the sub directory /fonts

I have another problem though in that i can't find a zipped version of the fonts required to download. 

I found the fonts here https://github.com/johnmccombs/arduino-libraries/tree/master/glcd/fonts
But if I right click on each entry  "Save As" the downloaded files have extra characters in them making them unusable.

glenn
vk3pe







On Tue, May 21, 2019 at 11:53 PM, Rob Bleumer wrote:
Ho Ashhar
Same question from me and I got also problems with the line containing fonts/allFonts.
Perhaps part of the same.
Rob PA0RBL