Date   
Re: atenuator

_Dave_ K0MBT
 

The attenuator varies from 0-254
If you switch over to the nextion display it becomes a slider on the main screen. Too loud just slide it to the right. Beats digging through the menus.

Re: atenuator

Evan Hand
 

If you have the Nextion display you will see a red rectangle show up that you can slide left or right to move the filter frequency tak8ng advantage of the 45mhz crystal filter to attenuate the signal. 

73
Evan
AC9TU

Re: CW operation on microBITX

geoffg3wzp@...
 

Well guess I am the dummy !! Got rig going on SSB then revisited the settings and on CW found all the options  that I had not realised were there!!
So set up straight key and the time to stay on before reverting to Rx  and is wonderful  ..doh !!!

Thanks for your patience
73

Geoff

Re: CW operation on microBITX

Bill Cromwell <wrcromwell@...>
 

High Five Geoff,

Nothing succeeds like success:)

73,

Bill KU8H

On 1/22/19 9:55 AM, geoffg3wzp@... wrote:
Well guess I am the dummy !! Got rig going on SSB then revisited the settings and on CW found all the options  that I had not realised were there!!
So set up straight key and the time to stay on before reverting to Rx and is wonderful  ..doh !!!
Thanks for your patience
73
Geoff
--
bark less - wag more

Re: atenuator

MVS Sarma
 

Yes Evan,
 That is what I too observed.
I wonder whether it has some thing to do with Calibration?


On Tue, Jan 22, 2019 at 7:29 PM Evan Hand <elhandjr@...> wrote:
If you have the Nextion display you will see a red rectangle show up that you can slide left or right to move the filter frequency tak8ng advantage of the 45mhz crystal filter to attenuate the signal. 

73
Evan
AC9TU

Re: atenuator

_Dave_ K0MBT
 

No not for calibration. It is to attenuate strong signals. I get a lot of powerful stations that saturate the audio Thanks for agreeing with me Evan.

Re: atenuator

Jerry Gaffke
 

Yes, attenuates signals on receive by positioning them on the skirt of the 45mhz crystal filter.
Might also be used for SSB transmit ALC if you are into that.
Idea originated with VK2ETA
    https://groups.io/g/BITX20/message/51909

Jerry, KE7ER



On Tue, Jan 22, 2019 at 07:35 AM, d balfour wrote:
No not for calibration. It is to attenuate strong signals. I get a lot of powerful stations that saturate the audio Thanks for agreeing with me Evan.

 

 

Re: atenuator

_Dave_ K0MBT
 

Thanks for the link

Re: Auto TX Smart Filter Controller #nano #arduino #filters #ubitx

Woody
 

Hi Tom, et. all,

Nice project, Bob...

I am rebuilding my homebrew amplifier (I use it with my K2) and would very much like to incorporate auto filter selection.  

I have 7 filters rather than 5, so would need to add 2 more output  lines. 
Also, an additional output would be great to enable the amplifier a few 10s of msec after filter relay output is stable -  to avoid hot switching.

Is there any more detailed information about the circuit / schematic?  ...Pinouts, etc.

It has been many decades since my last C programming and I am really rusty (so rusty the brain is seized) also I am Arduino ignorant.   But, from looking at the code, it appears these might be do-able, just not sure.

Would like to get more info...  My email is good at qrz.com...
Thanks,
Woody   KZ4AK

Re: Auto TX Smart Filter Controller #nano #arduino #filters #ubitx

Woody
 

er...  Make that nice project TOM !

Latest updates links wanted

M. LeBlanc
 

Hello,

I am looking for the latest updates links for the BIOS, Assembly, LCD upgrades for the uBitx revision 3.

Thank you,

Misha LeBlanc
VE9GIS 

Re: BITX 40 Arduino dead #bitx40 #bitx40help #arduino

Billy Shepherd <dis60cd@...>
 

https://vk3hn.wordpress.com/2017/02/02/arduino-and-si5351-dds-vfobfo/amp/

I got excited and damaged my pre-arduino VFO but managed to do what this cat does here. Get an Arduino (or whatever micro-controller) and this si5351 card all for less than $20 shipped if you try hard enough. It worked well until I operated in a thunderstorm. Don’t ask. I’m doing another with an Arduino Nano and adafruits version
 https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F171909660637

Need Help Troubleshooting UBit-X #ubitx-help

avavra1@...
 

Hi Group:

I am getting no audio out of my ubitX and have tried the suggestions posted here in another string.

1)  RX has +12V at R18 & R38.

2) TX is low at R28 and R40

3)  I have tried SPH out direct to an 8 h\ohm speaker with no results

4)  I M1 to Vol-M with no results.

I have checked voltage to the TDA8222 chip and VCC is present.

Still, no audio whatsoever.

I have the uBit-X schematic, and have a scope, signal generator and signal tracer, and am wondering if test point voltages and wave forms might be posted somewhere? 

Has any collected this information and where I can access it?

Thanks in advance.

- andy, KD3RF / VE2DXY


Re: Need Help Troubleshooting UBit-X #ubitx-help

Guy Skeer
 

I will be following with interest.  

I managed to trust the connector wiring of the power wire loom, and should have not, as it had power and ground reversed at the connector, and I shot reverse polarity into the works.  Transmit works, Raduino Works, but no audio.  

Hopefully I will be able to repair.  It is gonna push my sight, eye-hand coordination, and desoldering/soldering skills to replace SMDs, but I'm game for a good try.  

Re: Need Help Troubleshooting UBit-X #ubitx-help

Curt
 

Andy

See if you have sidetone when using cw. If you don't have a key, you still need that external 4.7k resistor anyway. Then put a short across the key input to listen for sidetone audio. If none, possibly the audio amp ic is defective, a common v3 malady I am told. Also you can inject audio into its input to see if this is the issue.

If this is the problem, I would be so tempted to not repair it, but use another audio amp board. V3 folk can chime in, or search here for v3 audio.

Curt

ubitx 40 Connecdtion

Bob Lunsford <nocrud222@...>
 

Got a new uBitx 40 and have a question about connecting it up.

Connecting up the Raduino, it says to plug in the 5-pin connector.
I see the 8-pin connector so no problem. But no 5-pin connector.
Does this mean that the 5-pin connector plugs into the 16-pin
connector? And if so, does it go i any particular way?

Hope someone can provide a better picture of the connections
to the Raduino. I suspect it is a different version from what is
show on the website for connecting the Raduino.

Don't want to krispy-fritter the Raduino so I'm going slow on this.

Also, I ordered the 10-turn pot for the tuning. Had a nut but no
lock-washer. Just a heads-up.

Bob — KK5R

Re: ubitx 40 Connecdtion

Doug W
 

Bob,
µBITX and BITX40 are different radios.  Which do you have?
--
www.bitxmap.com

Re: New ubitx CW not transmitting

Bob Hart
 

Thank you Steve.  Setting keyer to "hand key" did the trick.  Good that I did that before trying to rewrite the code.
Bob W7HNV

Re: ubitx 40 Connecdtion

Bob Lunsford <nocrud222@...>
 

Just got the BITX40 today. I had the uBitx before and sold it to
a man who wanted to run digital. It was a dream to put together,
no problem whatsoever.

But the picture on the wire-up page for the BITX40 does not
show the same thing for the Raduino that I got today. I do not
want to assume too much but it seems the 5-pin connector
plugs into the 16-pin connector but it's not clear if it's to be
put in on one or the other end. The 16-pin connector is
labeled P3. Off to one end of the board is U3 which is a
3-pin regulator, it seems. I think I know where the 5-pin
connector goes but want to make sure...

Bob — KK5R

--------------------------------------------

On Tue, 1/22/19, Doug W <dougwilner@...> wrote:

Subject: Re: [BITX20] ubitx 40 Connecdtion
To: BITX20@groups.io
Date: Tuesday, January 22, 2019, 6:12 PM

Bob,
µBITX and BITX40 are different radios.  Which
do you have?
--
www.bitxmap.com

Re: ubitx 40 Connecdtion

Jerry Gaffke
 

Bob,

I think you have it figured out.
The 5 pin cable goes on the end of the 16 pin connector that's nearest the 7805 regulator.

They only build one version of the raduino, one that plugs into a uBitx.
So all raduinos now have the 16 right angle header pins on the bottom.
Back when hfsignals only sold the Bitx40, it had a 5 pin connector on the end near the 7805 regulator,
leaving 11 unused holes in that row of 16.

Another change is that the Nano is socketed, so easy to swap out if you blow an IO cell.
However, if you buy a replacement Nano, be sure to get one that does not yet have the 
header pins soldered in place, because they must be installed on the "wrong" side of the board.

The only other change to the raduino is that they all come with uBitx firmware (I believe).
You will likely have to flash it with Bitx40 firmware.

There have been no board layout changes to the raduino
since it first came out in late 2016.

Jerry, KE7ER



On Tue, Jan 22, 2019 at 03:40 PM, Bob Lunsford wrote:
Just got the BITX40 today. I had the uBitx before and sold it to
a man who wanted to run digital. It was a dream to put together,
no problem whatsoever.

But the picture on the wire-up page for the BITX40 does not
show the same thing for the Raduino that I got today. I do not
want to assume too much but it seems the 5-pin connector
plugs into the 16-pin connector but it's not clear if it's to be
put in on one or the other end. The 16-pin connector is
labeled P3. Off to one end of the board is U3 which is a
3-pin regulator, it seems. I think I know where the 5-pin
connector goes but want to make sure...

Bob — KK5R