1. BITX20@groups.io
   Date   
Re: 3.2in Nextion display now looks great.

Malcolm
 

Hi Richard,
I'm happy to try an updated version of the 3.2 interface.
Regards, 
Malcolm EI8FH 
Re: 3.2in Nextion display now looks great.

Jim Sheldon
 

Depends.  What changes did you make?  They need to be documented so I know what they are supposed to do.  I try not to install anything in any of my radios before I understand what it does or at least is supposed to do.

You need to start creating instruction files to go along with your changes to any firmware so others can understand what you did.

Jim

Jim

On Jul 17, 2018, at 2:17 PM, Richard E Neese <kb3vgw@...> wrote:

you willing to try a updated version of the 3.2 interface I made a few changes to make it easier to use

Re: receive works great, but no trans power, #ubitx-help

Gordon Gibby <ggibby@...>
 

Stuff that doesn’t get through the filter can fry Q 90 and never get clipped by the diode mixer.....

For example, 2 meters 
TV 

I still don’t buy the distortion argument, otherwise Q90  would be creating exactly the same distortion.   We haven’t heard anyone complaining of that have we?

Gordon KX4Z 



On Jul 17, 2018, at 16:19, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:

Curious.
Q90 is the one that would fry if the antenna was hooked up and a nearby QRO station was operating.
Or a nearby electrical storm was operating.

Q13 of the Bitx40 often blow in this way.
The back-to-back diode fix of the Bitx40 is not such a good idea on the uBitx because
the uBitx is wideband up to the 45mhz filter, and the diodes can distort all that incoming RF.

We don't hear much about Q90 blowing on the uBitx, 
likely because the diodes in the first mixer conduct before there's real trouble.
Here's an old thread on this:  https://groups.io/g/BITX20/topic/7715656

Jerry,   KE7ER

On Tue, Jul 17, 2018 at 12:50 PM, Peter Parker wrote:

This fix may be helpful to someone. 

* Symptom: Low then almost no transmit power.  Power meter might move up to about 1w for a short time then drop down to very low.  Tx signal audible in local receiver but weaker than it should be.  PA transistor bias settings seem to be OK, indicating the IRF510s are OK. 

* Probing around with an RF probe indicated the burst from higher to low power was noticed on the PA transistor drain and back through the driver stage. 

* DC voltage check found all were OK except the emitter of Q90. Instead of 3 volts there was only 0.9v. 

* Q90 was removed and replaced with leaded transistor (I used a BC548 which is similar to a 2N3904).  Used adjacent parts to solder leads to for better spacing.  

Q90 turned out to be the problem.  With the new transistor the emitter voltage reads normal and the rig now transmits. 

73, Peter VK3YE
Re: receive works great, but no trans power, #ubitx-help

ajparent1/KB1GMX <kb1gmx@...>
 

It the signals are strong enough to fry Q90 the mixer will soon be gone too.
The BE junction is as robust as the mixer diodes.  so whatever you are seeing
is quite strong and could even be ESD.

For ubitx (V3 or 4) a pair of back to back 1n194/4148 diodes from K3 Pin14 to ground
is the best bet as then its only there for RX and has no impact on TX.

Bitx 20 and 40 the solution is different.

Its easily done on the back of the board.

Allison
Re: Windows Serial Port Problem

Jack, W8TEE
 

You can also support the Arduino group through direct contributions on the download site. I encourage everyone to make a contribution each year. See:



If they add a true symbolic debugger, I'll make an extra contribution!

Jack, W8TEE



On Tuesday, July 17, 2018, 12:32:35 PM EDT, Jon Titus, KZ1G <tituskz1g@...> wrote:


The clone boards are counterfeit when they use the "plus-minus infinity" trademark that Arduino.CC owns.  This has nothing to do with open-source.  Anyone can use open-source code, designs, etc.  But when someone steals a company's trademark and uses it on a product of their own, open source or not, they create a counterfeit.  Cheap watches from Hong Kong, marked "Rolex," for example.

Dictionary:  "Counterfeit: made in exact imitation of something valuable or important with the intention to deceive or defraud."  By applying the Arduino trademark, they create a counterfeit.  So someone buys a board with the copied Arduino trademark and thinks it's a genuine Arduino.cc device.  If it fails or has problems, it tarnishes the reputation of Arduino.  Clone manufacturers could avoid the counterfeit label if they simply mark boards "Arduino Compatible."  And not use the Arduino trademark.

Arduino.cc calls such products counterfeit, and that's good enough for me.  I buy genuine Arduino.cc boards and support the group's efforts.  Others can buy and use whatever they want.  'Nuf said.
--
Jon Titus, KZ1G
Herriman, UT USA

Re: Low output Bitx40

Guy N7BIR <sgbridge@...>
 

Hi Jeff,
are you seeing this low output in ssb mode or in CW mode?
Re: Question about Nextion display and firmware

hirosmb <hirosmb@...>
 

Thanks, Richard.

I will join the Facebook one.

// hiro, JJ1FXF



2018/07/17 10:16、Richard E Neese <kb3vgw@...>のメール:

if you join the facebook page ubitx you will get alot of info and the 1.095 is released a cw bug has been patched
I have done alot of work on the tft/hmi files 2.4-3.5

Re: RD16HHF1 power curve flattening...some

Clark Martin
 

Did you reroute the pins on the RD16HHF!, the are in a different arrangement than the IRF510.  The IRF510 is GDS, the RD16HHF1 is GSD.  Swapping the source and drain will blow the fuse like that.

Clark Martin
KK6ISP

On Jul 17, 2018, at 9:30 AM, fr.beckenbauer@... wrote:

Hi everyone,

I tried to do this mod: https://ubitx.net/2018/02/16/power-amp-fix/

I checked everything for shorts, and a multimeter connected to the power input shows typical capacitor behaviour. However, when I connect power, my 3A fuse instantly pops. Is it possible that fake RD16HHF1 are causing this? I'm kinda desperate.
Unbuilt uBITX Ver4 and Blue Cabinet for sale.

William Sallee <k6two@...>
 

I have an Unbuilt UBITX Ver 4 with matching Blue Cabinet for sale.  I want $180 shipped via Priority Mail. Text me 619 518 2547 I just am not motivated to build another superheterdyne transceiver. Not since I discovered SDR direct Sampling.
Re: Help with 40MBITX ... Please!

Don, ND6T
 

And a few here: www.nd6t.com
Re: The new uBITX boards are here

Michael Babineau
 

I made the mod to my V3 board to change C81 (near Q90) from 0.1 uF to 470pF,  this was to get more even output power across the bands as suggested by
Farhan. 

After doing this my output dropped to about 500 mW !  I was worried that I might have toasted Q90 (literally) in the process so I went back
to 0.1 uF for C81 and I am now back at the previous power levels, so obviously Q90 is still fine.  

After looking at the schematic again, it occurred to me that I either installed the wrong value cap at C81 or perhaps making this change necessitates
re-adjusting the trimmer pot RV1 ?   Can anyone who has successfully made this mod to their v3 board tell me if this is the case? 

Thanks 

Michael VE3WMB 
Re: Unbuilt uBITX Ver4 and Blue Cabinet for sale.

Joel Caulkins/N6ALT
 

So William, what blue cabinet are we talking about here. The amateurradiokits one?

Joel
N6ALT
I think this will work for the Ubitx...microphone

Kevin Rea
 

Hi guys,
I am just getting ready to build my first Ubitx.
I am going to use a Baofeng Microphone to do it.. so I bought one and took it apart..
and this is what I came up with after tracing the wires..
I am just using the microhone part of the mike, not the speaker.

I think this will work......????


Kevin Rea
K6REA
Re: Low output Bitx40

JeffG <jeff.goodley@...>
 

SSB Guy. With both pots turn right up I barely get a flicker on the needle of the power meter. Measures at 500 to 700 mW on transmit. 

Jeff
G6EXF. 
Re: RD16HHF1 power curve flattening...some

Clark Martin
 

Okay, I just noticed the second photo and it does look like you have the source and drains swapped.  Might there be a short between them.  I’d check out each transistor for a short using a ohmmeter.  With the power cable to the board disconnected you should see an open circuit.


Clark Martin
KK6ISP

On Jul 17, 2018, at 1:42 PM, Clark Martin <kk6isp@...> wrote:

Did you reroute the pins on the RD16HHF!, the are in a different arrangement than the IRF510.  The IRF510 is GDS, the RD16HHF1 is GSD.  Swapping the source and drain will blow the fuse like that.

Clark Martin
KK6ISP

On Jul 17, 2018, at 9:30 AM, fr.beckenbauer@... wrote:

Hi everyone,

I tried to do this mod: https://ubitx.net/2018/02/16/power-amp-fix/

I checked everything for shorts, and a multimeter connected to the power input shows typical capacitor behaviour. However, when I connect power, my 3A fuse instantly pops. Is it possible that fake RD16HHF1 are causing this? I'm kinda desperate.
#ubitx #ubitx-help Not able to set up extension switches using CEC firmware #ubitx #ubitx-help

Daniel Conklin
 

I have Ian's firmware version 1.08 and put three momentary switches with resistors between pins 4 and 5 on the encoder.  The resistor values ar 150K, 220K.,and 470K Ohms.  When I press them and click the button to read the ADC values I get 3, 5, and 6.  Those values are not useful.  I am not sure hat I may be doing wrong.  Can anyone here give me a clue?
Thanks and 73.
Dan, W2DLC
Simple RF actuated LED Tx indicator #ubitx #bitx40

Peter Parker
 

Suitable for any QRP rig, this has been worthwhile add-on as it shows that you're putting out power and the microphone is delivering audio. 


https://www.youtube.com/watch?v=iQ8YADOWk9U
Re: Raduino Pill

W3JDR
 

Hi Kees!
I stumbled upon this post while doing Google searches on Raduino. It is, of course, about my Raduino Pill board which is a direct replacement for the stock Raduino, but with an STM32F103 processor and much more I/O. I think it hits all the points on your wish list. I released the PCB to fab a few weeks ago and am waiting for boards to arrive from China. Assuming it functions without major rework, I'll post the CAD files and Gerbers on my web site and encourage others to develop for it. I plan to immediately mod the stock uBITX firmware to run on it, then will expand functionality to incorporate the work I've done with TFT displays, hi-res encoder and software S-meter & AGC. I've cleared my bench in anticipation of arrival and am checking the mailbox every day.

Joe
Re: #ubitx #ubitx-help Not able to set up extension switches using CEC firmware #ubitx #ubitx-help

Richard E Neese
 

ok 1 did you add the required resistors to each switch and it has to be a value of 80 or higher and you have to use the ubitx manager to setup the keys. also if you follow his page on setting them up it explains everything
Re: Help with 40MBITX ... Please!

AA9GG
 

I was looking for your site too but couldn't remember your call Don...

On Tue, Jul 17, 2018 at 4:02 PM, Don, ND6T via Groups.Io <nd6t_6@...> wrote:
And a few here: www.nd6t.com




--
Paul Mateer, AA9GG
Elan Engineering Corp.
www.elanengr.com
NAQCC 3123, SKCC 4628