I'm really stuck! No Xmit Pwr.
#ubitx
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
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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.
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Re: Microscope - - new thread
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.
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Re: BITX QSO Afternoon/Evening, Sunday, June 17, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.
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
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Re: Homebrew from scratch
#ubitx
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:? /g/BITX20/files/KM4TLR
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Re: Nextion Displays >> warning
Mike
Here is a pic of the 3.5 installed with the bezel I ordered
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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
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Re: Nextion Displays >> warning
Mike
If you go the the Nextion link below, you can download the 3d files for all of the Nextion screens
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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
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
<IMG-3429.jpeg>
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Re: Nextion Displays >> warning
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
?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
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Re: KD8CEC - Nextion Display - IAN questions
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
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Re: Audio Amplifier Module with Digital Gain Control
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
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Re: Microscope - - new thread
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:?
The 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
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Re: Audio feedback during transmit?
#ubitx
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
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
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Re: Nextion Displays >> warning
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
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Re: Homebrew from scratch
#ubitx
I am also working on a similar model of Modular approach. ? But I am working on a concept of Plug-in modules. I have already created some of the modules which when ready will be plugged in a Base board (Motherboard) and interlinked without cables. ? I share some of my Schematics with the group. ? regards charudatt ¨C vu2upx ?
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From: [email protected] <[email protected]> On Behalf Of Richie Chambless
Sent: Monday, June 18, 2018 7:51 AM
To: [email protected]
Subject: Re: [BITX20] Homebrew from scratch #ubitx ? Hello Woolf,
I have Eagle layout files for the RF sections of the UbitX. I took a modular approach, so there are several circuit boards that you could make a UbitX or a single conversion design. I've been thinking about uploading them to the files section for some time but I just haven't done it. Here are a couple of pictures of the exciter section (single conversion). Let me know if you would like them and I get email them to you:
 
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Re: Nextion Displays >> warning
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
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Check the obvious first. From the antenna input to the audio. So check first the stage from the antenna connector to the lowpass filter.
Il 19/giu/2018 05:32, "El Calvo" < 3voltios@...> ha scritto: Ok. Using the output of a dds generator and different attenuator blocks, to get the same audio out at 10m had to reduce att by 20db compared to 40m.
So what section should I start looking for the difference??
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Re: Nextion Displays >> warning
Somebody has already resized the
graphics for the 3.2 inch version (by upsaling the 320x240
images.?? But so far, no other versions are available.? I imagine
a number of other sizes will become available in time.?
One of the issues is that the graphics need to be redone for
larger screens because they are all low resolution at present.?
Ideally you would make graphics for the 7" screen first and then
resize to make them smaller to fit on any size screen (buttons
would vary slightly in dimensions because the horizontal to
vertical ration changes slightly according to screen size, but not
so that the buttons will look terribly out of place.
This doesn't actually require one to have all the different
screens available. The Nextion has a simulator built in.? However,
it does take a bit of time to produce TFT files for a range of
screen sizes.
Mike ZL1AXG ubitx.net
On 19/06/18 8:07 PM, adelolly07@... wrote:
This may be a silly question folks, but will Ian¡¯s files work ok
on the 3.2 inch version?
?Ade M0OJR
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Re: Nextion Displays >> warning
This may be a silly question folks, but will Ian¡¯s files work ok on the 3.2 inch version?
?Ade M0OJR
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Re: Nextion Displays >> warning
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
?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
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Latham, Chip
Gwen Patton
Paul Galburt - K2AYZ
