1. BITX20@groups.io
   Date   
Re: BitX40 v1.27.7 SPOT mode

Allard PE1NWL
 

Ah, that explains!
In your case you'd need to round to the nearest 10 Hz.

at line 481:
ultoa((frequency + 50), b, DEC); // construct the frequency string

change to:
ultoa((frequency + 5), b, DEC); // construct the frequency string

73 Allard PE1NWL

On Sat, February 3, 2018 20:34, Vic WA4THR via Groups.Io wrote:
Thanks, Allard. I'm thinking perhaps to eliminate the +50 in my version
since I am displaying an extra digit in normal mode. Do you know where
(what line) that rounding takes place?

73, =Vic=
WA4THR
Re: #ubitx-help Strong Audio Tones in and outside audio receive passband #ubitx-help

John Backo
 

USB requirements are rather stringent. Unless
the 12 MHz crystal has changed radically in frequency, it should
be pretty much left alone. (If it has changed or if it interferes,
the best solution is to replace the whole thing). Easy enough to determine:
try using the USB interface. If it communicates, all is ok.

Usually in the arduino, as in most uC's, most RFI problems are traced to the
external (16 MHz) crystal, or leakage into the power supply. If one is
not ready to replace the unit, the best solution is a new crystal; it can be
any of a number of frequencies. What changes is the timing span.

Alternately, one can try to shield everything -- especially the leads
going to other parts of the rig. Sometimes, the lcd is noisy and not
much can be done about it except to change the programming to
change the update method. But usually, that is a KHz and
not a MHz problem. In this case I would not discount it, however,
since the problem is audio sidebands.

john
AD5YE
Re: BitX40 v1.27.7 SPOT mode

Vic WA4THR
 

Thanks, Allard. I'm thinking perhaps to eliminate the +50 in my version since I am displaying an extra digit in normal mode. Do you know where (what line) that rounding takes place?

73, =Vic=
WA4THR
Re: uBITX AM BCI Filter #ubitx

Mike Woods
 

Thanks Nick

I will put up the further details on the news item on uBITx.net

I am sure that your mod will be widely adopted for those of us who are aflicted by nearby AM broadcast stations.

Mike

On 3/02/18 11:40 PM, Nick VK4PLN wrote:

Yes I cut the trace either side of the new HPF board, exposed a bit of the trace and jumperd onto that.
You need to cut the second trace from the PA side. They are in order:
1: TX pwr to the PA circuits via R89
2: RX path (between K1 and K3 relays. (CUT AND INSERT HERE)
3: TX pwr to the LPF bank.
4: RX pwr to the receive circuit (R18,R38...)

I picked up GND from the 2 unused caps C216 and C210
Filter Details: https://groups.io/g/BITX20/wiki/uBITX-AM-BCI-Filter
--
Mike Woods
mhwoods@gmail.com
UBITX COLOUR TOUCH DISPLAY CONTROLLER V.2.72U PHOTOS #ubitx

Joe
 

UBITX V.272U -FRONT PANEL VIEW
TOP INSIDE VIEW

From atmega 2560  - 3 cables for clocks and 6 pin harness to ubitx 2 cables for SI5351

Lower left are 2 voltage down converters - 1 adjusted to 9v for the atmega 
The other is same except it feeds the DDS SI5351 at  5 volts
They provide isolation lower regulated voltage extra filters and hash filters.
This results in no discernable vfo clicks on tuning or noise from the Digital boards.
Cheap at around $1.50 each.... ebay....
Lower right is the SI5351 DDs module from Adafruit...

I feed the usb from the Atmega to the rear of the case so  I can program it without removing the radio cover.


Connectors at rear for Digital  stuff - mic, speaker computer audio -- I still am wiring in the mic

Just a quick look at the pin connections
Details to follow


73
joe
VE1BWV
UBITX COLOUR TOUCH DISPLAY CONTROLLER V.2.72U Released #ubitx

Joe
 


Good Afternoon All,

VU2SPF - Dr. SP Bhatnagar(INDIA) and VE1BWV Joe Basque (CD)  are pleased to announce
 
The initial public release of the UBITX Colour Touch Display Controller v2.72u
This is essentially  the same as the one for BITX, but modified to work with the UBITX
The new software provides  a Colour Touch Display Controller with a no menu approach  to control your ubitx . 



More info:
http://vu2spf.blogspot.ca   - for latest code
Videos on You tube - search for vu2spf or vu2spf ubitx
Facebook Bitx 20


Features:
 
1. Low cost for parts - Suggested parts -  1 atmega2560 - approx $8.00US, 1 Addafruit dds Si5351 - $10.00  -  2.8 TFT  touch colour display     $12.00 US
 
2. All bands, band selectivity, USB LSB  -Works well with digital modes
 
3. All Display buttons are touch control - and no menus 
 
4. Any button can have a physical button and a TFT touch or any combination.
 
5. 100 memory channels
 
6. Tunable BFO's
 
7. 3 VFO'S - A  B  and  MEM
 
8. USB / LSB
 
9. TX  timeout control
 
10. Touch TX button and or physical TX control - for ptt mike or digital modes (vox input low)
 
 
Next : New Feature - Working on adding  Cat Control.


73
From Team TFT
VU2SPF (SP) AND VE1BWV  (Joe)  (joeman2116@...)

 
 
Re: Toroids winding information #ubitx

Jerry Gaffke
 

Cesar,

I think you have the transformer footprint figured out correctly. 

Sounds like you have resolved the PTT issue, and have moved on to 
the area of the board where the IRF510's blew as per your first post.
Perhaps T11 did get damaged somehow when the IRF510's blew.
But I'd think more likely it was either L8 or L9 that got damaged, and/or the associated traces.

Jerry


On Sat, Feb 3, 2018 at 08:03 am, César EA3IAV wrote:
I am still debugging and after checking many things inmay have to think of resoldering or remaking the t10 and t11...
I see 10 turns but then 3 wires
which is its dispossition
Pins (square is 1)

6 -  1
5- 2 
4 - 3

a - a’
b - b’
c - c’ 
Re: Second batch of uBITX shipping? #ubitx

Art Howard
 

I ordered mine December 18th and receive this today....

"We will be shipping your order early next week. Tracking details will be updated soon."



On 3 Feb 2018 9:45 am, "KK6VLV via Groups.Io" <syema2=yahoo.com@groups.io> wrote:
RE: https://groups.io/g/BITX20/message/41078
Thought I would get tracking info by end of the day yesterday, but no.
Still waiting for tracking info.

Hoping tracking info will come in Monday.
--
KK6VLV

Re: #ubitx-help Strong Audio Tones in and outside audio receive passband #ubitx-help

Jerry Gaffke
 

These are $2 Nano clones, and both of those crystals are almost microscopic.
USB spec says the 12mhz crystal must be correct within 0.25%, or 30khz.
The 16mhz crystal doesn't need to be any more accurate.  

But maybe they are accurate enough, and pulling either or both lower with parallel caps
will cure this issue.  Ideally far enough to miss both high and low side BFO placement.

Some 0201 caps across the IC pins may be the easiest way to hack them in.   ;-)
But I think shielding/bypassing should be looked at first.

If the 12mhz crystal were the problem, we could just shut it down entirely when not using the USB port.
But post 40432 says tones vary when finger is on the 16mhz crystal, suggests it is harmonics of the 16mhz
causing trouble.  Note that the CH340G and 12mhz crystal are on the back of the Nano, away from the radio. 

Jerry



On Sat, Feb 3, 2018 at 07:39 am, Arv Evans wrote:
Jerry

Interesting observation that the 12 MHz USB clock oscillator is on nearly the same frequency
as the uBITX IF and BFO.  If the BFO is offset to the high side of the IF passband it could well
be within audio range of the USB clock frequency.  If this is the problem then it might be possible
to pull the USB clock crystal down with a small parallel capacitor.  That should not make a
significant change in USB clock timing but could take it out of range of the receiver IF and BFO
frequencies.  Some experimenting is probably necessary to tell how far to pull the crystal.  It
would not be good to accidentally put it within the IF filter passband.
 
Arv  K7HKL
Re: Nextion display

Vince Vielhaber
 

Thanks Fred! I had already ordered one but it won't be here for a bit. Coming from China. Anyway with the tool downloads I found it easier to just download the entire site - so I did. So if the info ever disappears, I have a copy.

Vince.

On 02/03/2018 06:12 AM, Dr Fred Hambrecht wrote:
For those that may be considering the Nextion display, let me suggest
you start out by going to their website Https://nextion.itead.cc On the
home page select download and select the Nextion editor.
This will give you a chance to play without spending any money on buying
the actual display but allows you simulate the display and see if it
meets your needs.

V/R
Fred W4JLE
--
Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/
http://www.metalworkingfun.com
Toroids winding information #ubitx

César EA3IAV
 

I am still debugging and after checking many things inmay have to think of resoldering or remaking the t10 and t11...
I see 10 turns but then 3 wires
which is its dispossition
Pins (square is 1)

6 -  1
5- 2 
4 - 3

a - a’
b - b’
c - c’ 

?

thanks
Re: Second batch of uBITX shipping? #ubitx

KK6VLV
 

RE: https://groups.io/g/BITX20/message/41078
Thought I would get tracking info by end of the day yesterday, but no.
Still waiting for tracking info.

Hoping tracking info will come in Monday.
--
KK6VLV
Re: #ubitx-help Strong Audio Tones in and outside audio receive passband #ubitx-help

Jerry Gaffke
 

Wrong.     This part that  reads
    <<   second LO always at 45-12mhz
should say
   second LO is at 45-12=33mhz for LSB  and  45+12=57mhz for USB

Leaving the second LO parked at 57mhz will likely give fewer birdies.

Jerry



On Fri, Feb 2, 2018 at 11:48 pm, Jerry Gaffke wrote:
Currently the uBitx BFO is always below the crystal filter to avoid the tones, second LO always at 45-12mhz
Would be nice to  be able to switch sidebands by flipping the BFO to high or low side.
Could then have the second LO at either 45+12 or 45-12mhz, whichever gives fewer birdies
and other such artifacts. 
Re: #ubitx-help Strong Audio Tones in and outside audio receive passband #ubitx-help

Arv Evans
 

Jerry

Interesting observation that the 12 MHz USB clock oscillator is on nearly the same frequency
as the uBITX IF and BFO.  If the BFO is offset to the high side of the IF passband it could well
be within audio range of the USB clock frequency.  If this is the problem then it might be possible
to pull the USB clock crystal down with a small parallel capacitor.  That should not make a
significant change in USB clock timing but could take it out of range of the receiver IF and BFO
frequencies.  Some experimenting is probably necessary to tell how far to pull the crystal.  It
would not be good to accidentally put it within the IF filter passband.

Arv  K7HKL
_._


On Sat, Feb 3, 2018 at 1:47 AM, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:
I assume you mean changing the Arduino crystal, not cap.

The 16mhz ATMega328P crystal is about 3mm x 1.5mm, goes to  ATMega328p pins 7 and 8.
It is on the top of the Nano, just above the silk for edge pin D5.
Seeing the actual crystal now, and not just looking at datasheets and schematics, I see that it is
extremely small.   I doubt most of those with uBitx in hand will want to mess with it.

I bought some spare Nano clones, I believe they're identical to what's on the Raduino.
Mine have a CH340G chip on the back of the Nano for the USB interface.
This chip has another 3mm x 1.5mm crystal nearby, this one happens to be 12mhz.
    http://www.datasheet5.com/pdf-local-2195953

Quite possibly it is the 12mhz oscillator for the USB interface that is causing the trouble in at least some cases.
Though in post 40432 it was reported that a finger on the Nano's crystal caused the tones to vary,
which suggests that case was due to the 16mhz crystal since the 12mhz crystal is not usually accessible.

None of this was ever a problem on the Bitx40v3, far as I know.
I'd like to think there will be a simple fix, perhaps soldering in a bit of copper tape somewhere for shielding,
or adding a few caps.    Moving the IF would be pretty disruptive.

Jerry



On Fri, Feb 2, 2018 at 11:55 pm, Ashhar Farhan wrote:
changing the arudino cap is going to be a challenge as the arduino is soldered and you need to access it from the underside to desolder it. we had to resort to solder it in as keep it on a socket was leading to bulge and an additional failure point on the board.
 
Re: BitX40 v1.27.7 SPOT mode

Allard PE1NWL
 

Vic,

There's nothing wrong, it's just a matter of rounding.
In SPOT/Fine tune mode, the display shows the actual frequency at 1 Hz
precision. In normal mode the precision is 100 Hz, so we need to round the
number to the nearest 100 Hz.
So if the real frequency (as shown in fine tune mode) is for example
7.254.955 Hz, it will be rounded to 7.255.0 on the display in normal mode.

Rounding is performed as follows:
f(display) = int ( f(actual) + 50 )

73 Allard PE1NWL

On Sat, February 3, 2018 12:33, Vic WA4THR via Groups.Io wrote:
I am using Allard's wonderful v1.27.7 sketch in my BitX40, and because of
an trip planned this weekend was rushing to package it so it could be
used. I have added the PTT sense line, a FCN switch, and a SPOT switch,
and have significantly shortened leads in this final package. Everything
seems to be working well and I was able to use the rig mobile. When I
press SPOT I am able to fine tune in LSB mode very easily, but the
frequency displayed in SPOT mode differs from what the normal display
shows. For example, if I am on 7.255.00 and press SPOT, the display reads
7.254.955, so if I tune that to 7.255.00 and release SPOT I get 7.255.05
on the normal display. Am I doing something wrong? Is there some sort of
offset in LSB SPOT that needs to be adjusted?

 

73, =Vic=

WA4THR
New file uploaded to BITX20@groups.io

BITX20@groups.io Notification <BITX20+notification@...>
 

Hello,

This email message is a notification to let you know that a file has been uploaded to the Files area of the BITX20@groups.io group.

File: I designed this case for the uBITX all Band Transceiver.pdf

Uploaded By: Carl Beck

Description:
Case designed for uBITX

You can access this file at the URL:
https://groups.io/g/BITX20/files/I%20designed%20this%20case%20for%20the%20uBITX%20all%20Band%20Transceiver.pdf

Cheers,
The Groups.io Team
Re: Nextion display

馬玉麟
 

Thanks for your suggestion.

2018-02-03 19:12 GMT+08:00 Dr Fred Hambrecht <w4jle@...>:

For those that may be considering the Nextion display, let me suggest you start out by going to their website Https://nextion.itead.cc On the home page select download and select the Nextion editor.
This will give you a chance to play without spending any money on buying the actual display but allows you simulate the display and see if it meets your needs.

V/R
Fred W4JLE


BitX40 v1.27.7 SPOT mode

Vic WA4THR
 

I am using Allard's wonderful v1.27.7 sketch in my BitX40, and because of an trip planned this weekend was rushing to package it so it could be used. I have added the PTT sense line, a FCN switch, and a SPOT switch, and have significantly shortened leads in this final package. Everything seems to be working well and I was able to use the rig mobile. When I press SPOT I am able to fine tune in LSB mode very easily, but the frequency displayed in SPOT mode differs from what the normal display shows. For example, if I am on 7.255.00 and press SPOT, the display reads 7.254.955, so if I tune that to 7.255.00 and release SPOT I get 7.255.05 on the normal display. Am I doing something wrong? Is there some sort of offset in LSB SPOT that needs to be adjusted?

 

73, =Vic=

WA4THR
Re: uBITX AGC - Adafruit TPA2016, A Success! #ubitx

John <passionfruit88@...>
 

Thanks Nick.

73, John
Nextion display

Dr Fred Hambrecht
 

For those that may be considering the Nextion display, let me suggest you start out by going to their website Https://nextion.itead.cc On the home page select download and select the Nextion editor.
This will give you a chance to play without spending any money on buying the actual display but allows you simulate the display and see if it meets your needs.

V/R
Fred W4JLE
43721 - 43740 of 84736  
More
Home Messages Hashtags Wiki About Features Pricing Updates Terms Help Twitter