Date   

Re: Stray RF?

M Garza <mgarza896@...>
 

Try adding a clip on ferrite core. I had to add one to prevent similar issues while I continue to mod the transmitter section.

Good luck

Marco - KG5PRT 

On Tue, Jun 19, 2018, 9:16 AM William Cullison <wa8vih@...> wrote:
I'm having display issues when I transmit, but only in CW. My parallel 4x20 display begins displaying odd characters and symbols. It also can cause my display to blank when I try to access the menu function. I currently have the display extended while I wait for my level shifter board to arrive so I can change to I2C. I am using the latest CEC firmware version.


Re: Audio Amplifier Module with Digital Gain Control

Tominaz
 

Does it use the I/2c network or you using pins off the arduino. Neat idea by the way


On Tue, Jun 19, 2018, 5:09 AM James Lynes <jmlynesjr@...> wrote:
Bruce: 

Nice work.

I had wondered about using a digital pot in the AGC circuit as I was reviewing the various posted AGC designs.

James
KE4MIQ


Re: RF power chain mods and improvements..

ajparent1/KB1GMX <kb1gmx@...>
 

All three.


Allison


Re: Microscope - - new thread

Jerry Gaffke
 

We had a good stereo microscope at work.
Very cool, adds a whole new dimension to close work.
Was tempted to bring it home with me for a weekend
to look at bugs and leaves.  But it was heavy.

At one point we had a bunch of hybrid modules built,
each had several of silicon die on a ceramic substrate.
Needed a fix, a couple gold bond wires from die to substrate
had to be moved around.

Using the stereo microscope, a sharp Xacto knife, and no coffee,
found we could cut a bond wire with the knife and mash it into a different
pad on the substrate.  Hardest part was getting the knife into the field
of view while looking through the microscope.

At home here I have a cheap USB microscope.  Works in a pinch but
just ain't the same.

Jerry, KE7ER


Re: KD8CEC - Nextion Display - IAN questions

Ian Lee
 

Paul
Thank you for your interesting
Now the protocol is stable and compatible. It is expected to be compatible even if it is upgraded in the future.

Ian


2018-06-19 21:12 GMT+09:00 Paul Galburt - K2AYZ <galburt@...>:

Ian,

Will the support for the 3.2E that Allen developed be included with the next version of your software? That size seems the "sweet spot" to me in terms of price vs area.

Thanks again!

73,

Paul



--
Best 73
KD8CEC / Ph.D ian lee
kd8cec@...
www.hamskey.com (my blog)


Re: Microscope - - new thread

ajparent1/KB1GMX <kb1gmx@...>
 

I use a USB microscope I paid 50$ for.  The second was a USB video conference camera
I was given (free) and modded the lens for magnification and close range.

For laughs and on the cheap I got a lens set for the cell phone and the closeup leans
works well for those it really needs to be bigger moments.

The bench has a very nice inspection magnifier close at hand.

All are handy.  


I'm really stuck! No Xmit Pwr. #ubitx

Latham, Chip
 

HEEELLLPPP
I assembled a Ver.3 board and everything went very well but when I measured the power out it was dead. I don't have the best power meter. I was using MFJ tuner/watt meter, set to 35 watt scale, and I was getting about a half a needle width reading. I finally found " A Diagnostic Guide for uBitx" Thank you for that document Ufi Auttorri. I measured all of the TX measurements listed in the document and every one was very close. I went back through and checked again everything seemed normal I set the bias, I had beefed up the heat sinks for the 510's a little and have a fan on them, heat sink is isolated from ground and still no transmit power. The heat sink will after a while get a little warm. I borrowed a friends QRP guys Voltmeter/ watt meter interface and measure 10 microwatts not milliwatts. It seems like something is not coupling the RF through. So I'm kinda stumped as to what to test next. 
Please Help someone, I love this radio.
73 N5FJK
Chip


Stray RF?

William Cullison
 

I'm having display issues when I transmit, but only in CW. My parallel 4x20 display begins displaying odd characters and symbols. It also can cause my display to blank when I try to access the menu function. I currently have the display extended while I wait for my level shifter board to arrive so I can change to I2C. I am using the latest CEC firmware version.


Re: Microscope - - new thread

Gwen Patton <ardrhi@...>
 

I've wanted one of those AmScopes for a while now, but the price is out of my reach at the moment. Maybe in six months. My next two slated purchases for my bench are a stereo microscope and a 3d printer. I want to be able to make small parts and enclosures, and need something to give me good vision of what I'm working on.

I have one of those USB microscope things. It works so-so. The picture is wonderful, but what isn't wonderful is having to screw my neck into a cruller just to look at the screen while working on a board. Since I have a bad neck due to an accident in 2006, I can't do that for very long. The microscope with its own screen still requires bilocation to some degree -- working on the board while looking at a screen -- but at least the screen is in line with the work, and doesn't require that I bend my neck into a pretzel to use it.

But a 3d printer is the next big slated purchase, I think. I did back a resin printer on Kickstarter, but it's one of those "will it EVER ship?" projects. I've lost confidence it'll ever actually ship, and that if it does, that it'll ever actually WORK.


Re: BITX QSO Afternoon/Evening, Sunday, June 17, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.

Ken Peck <kenbpeck@...>
 

William, I'm just north of Orlando in Deland.  I agree the QRM has been awful on 40 meters of late.  I've been pretty successful with FT8 on the uBitx, but even that has been difficult over the last few days.  I'll try to be on the frequency on time this next Sunday and perhaps we can at least hear each other.
Ken


Re: Homebrew from scratch #ubitx

Richie Chambless
 

I have uploaded all of my Eagle layout files to the file section. You will need to download Eagle editor to see them. The good news is the basic version of the software is free: https://groups.io/g/BITX20/files/KM4TLR


Re: Nextion Displays >> warning

Art Olson
 

Mike

Here is a pic of the 3.5 installed with the bezel I ordered

image1.jpeg


On Jun 19, 2018, at 8:22 AM, Joe <joeman2116@...> wrote:

Well. My plan is to have the display as a remote head.
In its own 3d printed box.
Probably with an encoder, vol and maybe rf gain.

The 7 inch size will make it easy to use as a Touch control. Lots of room for big fingers and good for aging eyes.. Lol

Also additional buttons and sliders for brightness control, sub menus etc

 Most small displays are a bit awkward for touch, because of button size / real estate size and it was only $12 more than a 5 inch.

Should arrive this week... Let the fun begin....

Joe
VE1BWV




On Jun 19, 2018 4:43 AM, "Mike Woods" <mhwoods@...> wrote:
Joe

I'd be interested in what you will do with all that real estate on the 7"!

Mike ZL1AXG


On 16/06/18 8:20 AM, Joe wrote:
I have ordered mine from www.Robotshop.com
 two 3.2 inch Enhanced version and one 7 inch basic - all good.

Joe
VE1BWV

On Fri, Jun 15, 2018 at 4:37 AM Glenn <glennp@...> wrote:
I purchased what appeared to be a Nextion display according to the description, off ebay recently. Cost was $12.  It arrived ok but does not work. The Nextion editor warns that displays with the prefix "TJC" are not compatible. On ebay they are being sold as Nextion displays but appear to be some sort of copy. (Hardly unusual) ( Genuine Nextion displays start at more like $18-20.)

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.

glenn


--
Mike Woods
mhwoods@...



Re: Nextion Displays >> warning

Art Olson
 

Mike

If you go the the Nextion link below, you can download the 3d files for all of the Nextion screens


Art


On Jun 19, 2018, at 6:00 AM, Mike Woods <mhwoods@...> wrote:

Ade

You will be interested to see that I now have my 3.5" Nextion Standard screen working.   Just needs to be installed properly in the front panel.

The hard work in upscaling graphics and repositioning and resizing the buttons, S-meter etc was completed by KN4UD.

The graphics are a bit fuzzy from being upscaled.  They need redoing for higher resolution screens, but time is always against me ...

Mike ZL1AXG ubitx.net



On 19/06/18 8:35 PM, adelolly07@... wrote:
Mike, many thanks for answering my question and in great detail. I think I have some playing around to do. At least it will keep me out of mischief. 
73 Ade M0OJR


--
Mike Woods
mhwoods@...
<IMG-3429.jpeg>


Re: Nextion Displays >> warning

Joe
 

Well. My plan is to have the display as a remote head.
In its own 3d printed box.
Probably with an encoder, vol and maybe rf gain.

The 7 inch size will make it easy to use as a Touch control. Lots of room for big fingers and good for aging eyes.. Lol

Also additional buttons and sliders for brightness control, sub menus etc

 Most small displays are a bit awkward for touch, because of button size / real estate size and it was only $12 more than a 5 inch.

Should arrive this week... Let the fun begin....

Joe
VE1BWV




On Jun 19, 2018 4:43 AM, "Mike Woods" <mhwoods@...> wrote:
Joe

I'd be interested in what you will do with all that real estate on the 7"!

Mike ZL1AXG


On 16/06/18 8:20 AM, Joe wrote:
I have ordered mine from www.Robotshop.com
 two 3.2 inch Enhanced version and one 7 inch basic - all good.

Joe
VE1BWV

On Fri, Jun 15, 2018 at 4:37 AM Glenn <glennp@...> wrote:
I purchased what appeared to be a Nextion display according to the description, off ebay recently. Cost was $12.  It arrived ok but does not work. The Nextion editor warns that displays with the prefix "TJC" are not compatible. On ebay they are being sold as Nextion displays but appear to be some sort of copy. (Hardly unusual) ( Genuine Nextion displays start at more like $18-20.)

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.

glenn


--
Mike Woods
mhwoods@...



Re: KD8CEC - Nextion Display - IAN questions

Paul Galburt - K2AYZ
 

Ian,

Will the support for the 3.2E that Allen developed be included with the next version of your software? That size seems the "sweet spot" to me in terms of price vs area.

Thanks again!

73,

Paul


Re: Audio Amplifier Module with Digital Gain Control

James Lynes
 

Bruce: 

Nice work.

I had wondered about using a digital pot in the AGC circuit as I was reviewing the various posted AGC designs.

James
KE4MIQ


Re: Audio feedback during transmit? #ubitx

Joe
 

I installed one of the thump fixes which uses a 2n7000 and a resistor.

Joe
Ve1bwv


On Tue, Jun 19, 2018, 8:41 AM iz oos <and2oosiz2@...> wrote:

Excellent solution, does it also remove the thump?


Il 19/giu/2018 02:44, "Joe" <joeman2116@...> ha scritto:
Plenty of builders have had this problem.   Lots of fixes.

The one I used was, I just added a small low trigger 5v relay .
I put the relay trigger across the PTT of the ubitx, so when Ptt is pressed, the low level triggers the relay.  
I feed my speaker to the  normally closed contacts so when the relay is triggered, it opens the Speaker path and connects the path to a 10 ohm resistor to gnd
Result: no Sound coming from external speaker.

Joe
ve1bwv


On Mon, Jun 18, 2018 at 7:00 PM Jim Reagan <jimreagans@...> wrote:
I'm having audio feedback during transmit through my external speaker.!  I have the issue even with a dummy load.  I hear my voice (distorted) on the receive side when transmitting on any band. Anyone else have this issue?
Thanks,,
Jim W0CHL


Re: Microscope - - new thread

Paul Galburt - K2AYZ
 

The camera microscope is very clever. Getting a monitor screen in the right place to avoid twisting your head and neck after hours of soldering may be a challange.

Stereoscopic vision is very useful, though, and I made myself a present last year of one of these: 

http://a.co/j58ft35The 10X power and 9" working clearance brings me to the limit of how steady my hands are. This has enabled my to mount Si5351 with little trouble. It's expensive, but makes working on this tiny stuff fun again.

73,

Paul


Re: Audio feedback during transmit? #ubitx

iz oos
 

Excellent solution, does it also remove the thump?


Il 19/giu/2018 02:44, "Joe" <joeman2116@...> ha scritto:
Plenty of builders have had this problem.   Lots of fixes.

The one I used was, I just added a small low trigger 5v relay .
I put the relay trigger across the PTT of the ubitx, so when Ptt is pressed, the low level triggers the relay.  
I feed my speaker to the  normally closed contacts so when the relay is triggered, it opens the Speaker path and connects the path to a 10 ohm resistor to gnd
Result: no Sound coming from external speaker.

Joe
ve1bwv


On Mon, Jun 18, 2018 at 7:00 PM Jim Reagan <jimreagans@...> wrote:
I'm having audio feedback during transmit through my external speaker.!  I have the issue even with a dummy load.  I hear my voice (distorted) on the receive side when transmitting on any band. Anyone else have this issue?
Thanks,,
Jim W0CHL


Re: Nextion Displays >> warning

Mike Woods
 

Ade

You will be interested to see that I now have my 3.5" Nextion Standard screen working.   Just needs to be installed properly in the front panel.

The hard work in upscaling graphics and repositioning and resizing the buttons, S-meter etc was completed by KN4UD.

The graphics are a bit fuzzy from being upscaled.  They need redoing for higher resolution screens, but time is always against me ...

Mike ZL1AXG ubitx.net



On 19/06/18 8:35 PM, adelolly07@... wrote:
Mike, many thanks for answering my question and in great detail. I think I have some playing around to do. At least it will keep me out of mischief. 
73 Ade M0OJR


--
Mike Woods
mhwoods@...