Date   
Re: For Sale new uBITX kit with additional uBITX board plus display

Ted
 

Would you share the repairable aspect?  Either piublically or by private response.  Thanks in advance, as I've got a few to resurrect if possible.

- Ted
 K3RTA

Re: For Sale new uBITX kit with additional uBITX board plus display

Patrick Pelletier
 

Hi Jim,

It was actually the other way around.  But I changed my mind and decided to play with my raduino and some of my own circuits.

Thanks,

Patrick


On Thu, Dec 19, 2019 at 8:26 PM Jim Sorenson <kjsorenson@...> wrote:
Hi Patrick, 

I sent you a reply this morning by private messaging on this board. Perhaps you did not receive it. 

Jonus needs the board only. Perhaps I could send it to him directly and then work out something with you for the new kit. 

Thanks, 

Jim 

Re: ubitx v6, refactored code

Vic WA4THR
 

Rick, are you using the KD8CEC software in your V5? If so, using his Memory Manager program will allow you to plug in "typical" values for the VFO and BFO numbers and that should get you where you can hear stuff, then you can adjust as needed. I'd give you what I have on mine, but as it is a V4, it will not work on a V5 machine, so be sure you get some V5 numbers.

=Vic=

Re: V6 radino on V5 board?

Evan Hand
 

There are also differences in the "CONTROL" connector.  This means you need to rewire that connector as well.  The only connector on the v6 Raduino that has not changed from the v4/5 is the "OSCILLATORS" connector.

73
Evan
AC9TU

Re: Flrig and uBitX not connecting

Vic WA4THR
 

No, the need never came back up. I could use WSJT-X if I wanted to control and the Flrig was basically for fun and maybe use Fldigi at some point. I see the fl*** programs get updated a lot, so maybe something more recent has fixed the problem.

=Vic=

Re: V4 TX problems and new finals #ubitx-help

Don - KM4UDX
 

Jerry -- thank you for the clever application for my excess 510 and thermal switches. Love it.

Don
km4udx

Re: V6 radino on V5 board?

Jerry Gaffke
 

I had previously written:

>  hopefully the new display can plug into that same old connector with no soldering necessary.

Wrong.  The connector from Raduino into the display is different, has 14 pins instead of 16 for starters.
Power and ground have moved so attempting to plug a 2.8" TFT into the old Raduino will smoke something.

The new v6 Raduino is a differerent PC Board layout to accommodate the different display connector.
Using the new TFT display with the old Raduino might be possible, but will require a dozen or so wires 
from old Raduino to display. 

Jerry


On Thu, Dec 19, 2019 at 08:46 AM, Jerry Gaffke wrote:
From Farhan's post of    https://groups.io/g/BITX20/message/73708
>  The V6 is just an easier to assemble v5. No difference at all but for the touch display.
>  You can buy the tft off ali express for about 5 dollars and upgrade the firmware.

So the answer is yes, you can update a v5 to have a v6 style display.
No need to swap out the entire Raduino, just the display itself.
Then burn the v6 firmware into the Nano.

I believe the Raduino board has not changed since first introduced for the Bitx40,
except that now a socket is used on the Nano to make it easier to replace.

The old 2x16 display just plugs in, hopefully the new display can plug into
that same old connector with no soldering necessary.

In the past, it has been possible to buy a Raduino separately from hfsignals for about $30.
I don't see that as an option on hfsignals.com now, the only items to buy are the complete v6 uBitx and the Antuino.
But if the display is easy to swap out, and the Nano is socketed and thus easy to replace if it fails,
that covers most of why you would want a new Raduino. 
About the only other stuff on the Raduino is connectors, LM7805 regulator, and the si5351.
If you really do need a new Raduino there have been third parties posting to the forum
offering their own version for sale, some of them with significant enhancements.

Jerry, KE7ER

Re: V6 radino on V5 board?

MVS Sarma
 


On Fri, 20 Dec 2019, 2:52 am Jim Sheldon, <w0eb@...> wrote:
Yes.  V6 doesn't use an LCD at all.  It uses one of the 2.8" TFT color
screens and the pinouts go to a 14 pin connector that's mounted down the
right side of the V6 Raduino board.  V6 Raduino is the same size and has
the same mounting holes as the 2.8" ILI9341 display they (and we) use.

If his schematic for the V6 is right, the pinouts for the Display  (they
are all available on the old 16 pin LCD connector)

I can't get a NANO (with Farhan's factory code) to boot to the 2.8"
display (same one they used).  Your code doesn't boot to the display
either either in a Teensy 4 or NANO.  I tried it on both a Raduino clone
of ours and a real Raduino (the one from the V5 board you gave me). 
Neither work.

Jim

Signals from the display and where they are supposed to go according to
the Raduino schematic:
1 -- VCC +5V to +5 on the Raduino
2 -- GND  to GND on the Raduino
3 -- CS to D10 on the NANO or Teensy
4 -- RESET tied to +5
5 -- D_C to D9 on the NANO or Teensy
6 -- SDI/MOSI to D11 on the NANO/Teensy
7 -- SCK to D13 on the NANO/Teensy
8 -- LED to +5 for full brightness or through 22 ohm resistor for less
brightnexx
9 -- SDO/MISO to D12 on the NANO/Teensy
10 -- T-CLK (parallel with SCK) to D13
11 -- T_CS to D8 on NANO/Teensy
12 -- T_DIN parallel with MOSI
13 -- T_DO parallel with MISO
14 -- T_IRQ not used leave open







Re: Flrig and uBitX not connecting

Jay - WS4JM
 

Vic,

I know this is an old thread, did you ever get this to work?

Jay
WS4JM

Re: For Sale new uBITX kit with additional uBITX board plus display

Howard Fidel
 

Jim:
Do you still have the two boards, and the blown out Raduino, they are repairable.

Howard

On 12/19/2019 9:45 AM, Jim Sorenson wrote:
I have a new uBITX kit and a spare uBITX board for sale. 

The uBITX board without the Raduino was part of a working system till I blew out the Raduino. 
The uBITX kit is new in the box and was purchased within the last 5 months. 
I'll include a display and various part from the first kit. 

$150 for both kit and additional board, parts and display
PayPal to my email and I can ship today CONUS - shipping on me. 

I enjoyed using the uBITX while the Raduino was OK, but am moving house and would not get back to this project for some time. 

Many thanks, 

Jim Sorenson
W3BH

www.w3bh.com








Re: µBITX & QRP labs 50W PA

Alex Netherton
 

Is there a cost effective way to add band switching? The scope trace showing on the page seems pretty good.


On Wed, Dec 18, 2019 at 12:36 AM wnpauls via Groups.Io <pschumacher=winona.edu@groups.io> wrote:
That would work, but it will need band pass filters and the
associated band switching.  The same amp is available (unassembled)
for about 38 to 40 US dollars shipped. 

Paul K0ZYV 

From: BITX20@groups.io <BITX20@groups.io> on behalf of Alex Netherton via Groups.Io <anetherton=gmail.com@groups.io>
Sent: Tuesday, December 17, 2019 9:06 PM
To: BITX20@groups.io <BITX20@groups.io>
Subject: Re: [BITX20] µBITX & QRP labs 50W PA
 

On Thu, Dec 12, 2019 at 11:49 AM Arvo W0VRA via Groups.Io <arvopl=yahoo.com@groups.io> wrote:
Anybody considering using a QRP Labs 50W PA with their µBITX?

http://qrp-labs.com/50wpa

There's no band switching yet.

Re: For Sale new uBITX kit with additional uBITX board plus display

Jim Sorenson
 

Hi Patrick, 

I sent you a reply this morning by private messaging on this board. Perhaps you did not receive it. 

Jonus needs the board only. Perhaps I could send it to him directly and then work out something with you for the new kit. 

Thanks, 

Jim 

Re: V4 TX problems and new finals #ubitx-help

George
 

RD16HHF1 and heatsink out - is much better than RF510 inside the room.

Re: V4 TX problems and new finals #ubitx-help

Jerry Gaffke
 

Don,

So you have temp sensors that turn off when they get hot, and a bunch of extra IRF510's?
An excellent opportunity to better understand what an IRF510 does!

Here's the data sheet:
  https://www.vishay.com/docs/91015/sihf510.pdf

Assume we tie the SOURCE pin of the IRF510 to ground, the DRAIN pin to one side of your fan, and the 12v line to the other side of the fan.
When the IRF510 conducts from DRAIN to SOURCE, the fan will be working.

How do we tell the IRF510 to turn on?
We raise the GATE pin from zero volts (measured with respect to the SOURCE pin, which in our case is the same as ground)
up to maybe 12 volts.  You want 5 volts to turn it on good, anything over 20 volts on the GATE can destroy the IRF510.
So if we tie a 1k resistor between the 12v power supply and the GATE, the IRF510 will turn on and the fan will spin up.

How do we get the IRF510 to turn off?
We can now just short that GATE pin to ground with a wire, that puts 12 volts across the 1k resistor and we waste a measly 12v/1k = 12 milliamps of current.

How can we use your normally closed thermal switches to short the gate to ground when the thermal sensor cools off?
Just tie the thermal sensor between the IRF510 GATE and ground.
When the the thermal sensor gets hot, the switch inside opens up, the GATE is no longer shorted to ground
and so the wimpy 1k resistor can pull the gate up to 12v, which turns on the IRF510, which allows current to flow through the fan.

As a bonus, if you ever blow the IRF510's in the uBitx main board, you know where you can find a couple spares.


30 Watts out?
That's way too much.
The rig is probably distorting badly, and you are seriously in danger of destroying your uBitx.

Jerry


On Wed, Dec 18, 2019 at 09:14 PM, Don - KM4UDX wrote:
Then I moved up to +15V on the brown wire. I got more power. Then +20V.  And I got even more power. I was mad with power! How much power you ask? 30W on 80m. And the spectral purity is only sort of marginal. hahaha.  I keep it below 30w...mostly...I try to keep it down...really I do...but sometimes...I ...just...can't...help...myself....ahhhhh.

I felt like Dr. Frankenstein..."it lives!!!"

The hormonally excessive large heat sinks got thermal switches to drive fans. The case got cut to hold the fans. Power was supplied to the fans. I was ready to conquer the world!

Except the fans didn't really work.  The thermal switches were "on" all the time, the fans even with soft mounts made a racket, and the stupid fans would clog every time I hit TX.  And then they died. Maybe cause I paid $1.99 per fan?

So I need to redo all the fan business.   And I didn't think to test the thermal switches ahead of time. Normally open? Normally closed? hun? what? Such an idiot.

Re: Audio Buzzing

N7XG
 

I am also having the same buzzing as described. I am using the uBitx with a 5" nexion screen, the base package including the audio amp. I have tried 2 different power supplies for the touch screen, same hum on both.

The hum is constant, that is always at the same level regardless of the volume control.

Re: V4 TX problems and new finals #ubitx-help

ajparent1/kb1gmx
 

Using variable speed fans by running them at 5V for 12V fans and using
temperature sensing to speed them up  works well.   Save for you cannot 
touch the heatsinks as they are RF hot so they must be grounded and
use mica or ceramic (alox) pads to isolate the  MOSFETS.

You want to keep the fans on during RX to get the heatsinks cool again
or the next sill start warmer and get hotter still. If done on PTT a timer
on the fans may work.  

With any approach a air tight case is going to result in problems.
You need to get the heat outside either by air flow in the case or
by using the case (aluminum) as part of the heatsink with finned
surface outside.
---------------------------------
No direct email, it goes to bit bucket due spam

Re: V4 TX problems and new finals #ubitx-help

ajparent1/kb1gmx
 

Mark,

Running  at 175C is way too hot for any reliability.
Keep it cooler.  That means more heatsink as you pay a
2.5degreeC/per watt of heat dissipated price for the part.
At over 100C you need to seriously derate the part of it 
so it will survive.

Reminder at 10W out you doing about 10W of it as heat.
Its not a lot but you have to get it out of the part and that
is harder.  SSB its not that bad for acerage power but at
FT8 full bore, fans!

So to stay cool you need a heatsink that stays much cooler
say under 45C (about 112F) measured as then you have
a bit of headroom.

---------------------------------
No direct email, it goes to bit bucket due spam

Re: V4 TX problems and new finals #ubitx-help

 

Yep I'm sure,

If you read his article about the amp, you can see OM Kosser is a really careful designer that worked very hard to make that amp a nice reliable design.  So he was being prudent and recommending to keep the transistor within recommended temp range of the datasheet.  He did mention that it might be safe running to a maximum junction temperature of 175C which means a heatsink temperature max of 57C.  So that seems to be what some here may be doing.

I was mostly posting the info for users wanting to do digital modes and giving them an idea of what to watch out for.  In that regards, the choice of a turn-on temperature of 35C is not a bad choice at all.  The same thermal switches could be kept and just use a relay or power switching transistor to reverse the mode.

Personally, I think just operating the fans on PTT is a good way to go as long as a larger diameter/lower speed fan is chosen to keep it quiet while keeping the air flow up.

73,


Mark.

Re: V6 radino on V5 board?

Jim Sheldon
 

Yes. V6 doesn't use an LCD at all. It uses one of the 2.8" TFT color screens and the pinouts go to a 14 pin connector that's mounted down the right side of the V6 Raduino board. V6 Raduino is the same size and has the same mounting holes as the 2.8" ILI9341 display they (and we) use.

If his schematic for the V6 is right, the pinouts for the Display (they are all available on the old 16 pin LCD connector)

I can't get a NANO (with Farhan's factory code) to boot to the 2.8" display (same one they used). Your code doesn't boot to the display either either in a Teensy 4 or NANO. I tried it on both a Raduino clone of ours and a real Raduino (the one from the V5 board you gave me). Neither work.

Jim

Signals from the display and where they are supposed to go according to the Raduino schematic:
1 -- VCC +5V to +5 on the Raduino
2 -- GND to GND on the Raduino
3 -- CS to D10 on the NANO or Teensy
4 -- RESET tied to +5
5 -- D_C to D9 on the NANO or Teensy
6 -- SDI/MOSI to D11 on the NANO/Teensy
7 -- SCK to D13 on the NANO/Teensy
8 -- LED to +5 for full brightness or through 22 ohm resistor for less brightnexx
9 -- SDO/MISO to D12 on the NANO/Teensy
10 -- T-CLK (parallel with SCK) to D13
11 -- T_CS to D8 on NANO/Teensy
12 -- T_DIN parallel with MOSI
13 -- T_DO parallel with MISO
14 -- T_IRQ not used leave open

Re: Templates for China EF01 Electronic Plastic Shell Project Case for a BITX40

KE2GKB
 

Apologies for the late reply Steve,
Tinkercad lets you export flat drawings for engraving and such. That may suite your needs. However thingiverse i believe has no support for such im afraid.


On Thu, Dec 19, 2019 at 2:17 PM Steve Sawicki via Groups.Io <ab2et=yahoo.com@groups.io> wrote:
Erwin,
I do agree with you that plastic can be a bit brittle that is why I was looking for a template as I did not want to find a insert replacement when a failure did occur.
, I will be very careful as I will be using my Dremel tool with a plastic routing bit or the nibbling tool, no matter which a flat file will be still be needed.
Unfortunately in my new  retirement home shop space and funds for 3D printers are at a premium, thus the old school construction techniques.
I downloaded the panel software and files an I now have a printed overlay that I can use to mark up the panel.  
Best Regards.
Best wishes for the Holidays and a Healthy and Happy New Year.
Steve
AB2ET   
 


--
Tim Keller - KE2GKB
https://shop.kit-projects.com