Date   
Re: #ubitx-help #v6 #audiocircuit #v6 #audiocircuit #ubitx-help

Daniel Wise
 

Im trying to hook up the amplifier that comes with the amateurradiokits.in case. I have connected P4 to the audio in connection on the amplifier and then my speaker is connected to the speaker connection on the front panel board. I now have audio from the seaker, but I cannot adjust the volume and trying to adjust the 10k pot on the amplifier board does nothing. This is from the Please read.txt file:

1. New Audio Amplifier based on LA4425 5 watts Audio amplifier, the audio input in taken from the pre audio stage, we shall put up some pictures soon as from where to take the output.The audio Amp can be connected to 12 volts powered from TX RX Relay from ubitx.The RX point is to be used.
The Audio amp has a preset,10K adjust audio as per you need, e careful audio can be very loud, the front panel Volume is as main volume control, the one on pcb audio amp to be set as per audio required maximum.

It reads like I'm supposed to pick up audio before the LM386 on the uBitx board, but the picture they show is from a v4 board and it uses a different amplifier so I'm not really sure where I should be getting the audio to feed the amplifier board. I'm thinking I might not use the audio amplifier board and just wire the volume pot in place of the one on the uBitx board, but then I'm going to have to figure out how to interface the AGC.

Re: #ubitx-help #v6 #audiocircuit #v6 #audiocircuit #ubitx-help

Richard
 

Are you trying to hook up the speaker or an aftermarket amplifier? There is a header on the mainboard, I don't remember it's number that is an audio interface.

Re: V5 not receiving local am stations

MVS Sarma
 

Vagter your medsage i checked again my local am station on 738khz. It is clean reception.. 
Ascalready suggested with kd8cec firmware, selectv160m and  with 1khz step tune down to wanted frequency. . I receive long distance stations too. 
Perhaps if your antenna nulls to the station, signal might be weak.

On Mon, 24 Feb 2020, 7:24 pm Daniel Flanagan, <danflan49@...> wrote:
I just put CEC V1.2 on my V5 and it tunes only to just below 3.0 MHz.



On 2/24/20, Evan Hand <elhandjr@...> wrote:
> What software are you using on the uBitx?  Stock or another version like
> KD8CEC's?
>
> The original software was for 3 to 30 MHz.  CEC expanded to include down to
> 1 MHz.  Not sure if any versions go below 1 MHz.
>
> Are you trying to tune in a 720 KHz signal?
>
> 73
> Evan
> AC9TU
>
>
>
>



Re: No RX LED indication #v5

Brad, K7NNR
 

Thanks Curt.  That is one of the first things I tried and I can confirm that the color changes if I flip the connection.

I will try to post a picture of the connection tonight....maybe I am hooked up to the wrong spot on the board.

Re: PTT on v5 leads to radioset going in setup mode

saiyam dutt
 

Thanks you all 
sply 
Raj vu2zap , Evan hand , Gordon bibby .
Shielding my rig from Rf did solve the problem 
Thanks again 
Regards 
Vu2ogb

On Sun, 23 Feb 2020, 14:09 Raj vu2zap, <rajendrakumargg@...> wrote:
Your power supply may not have the required capacity, I recommend 3A.

Your raduino wiring may be picking up RF, shorten wires to as much as you need. I usually remove
any unused wires. You can do that easily by pressing on the connect slot while pulling on an
individual wire.

Raj


At 23-02-20, you wrote:
>Dear allÂ
>I have recently finished construction of my #ubitx v5 and one problem I am unable to understand is every time I press my ptt swich radio goes in setup while showing Tx on the screen , if any one has faced a similar issue please help , I have double rechecked my wiring from both digital and audio connector.
>Regards




Re: V5 not receiving local am stations

Evan Hand
 

I went back and verified that if you tune down from above 3 MHz it does go below 1 MHz.  If you accept the 100 Hz tuning step, that is a LOT of turns of the dial.  I have the Nextion display on my v5 and set the tuning step to 1 KHz.  Still a lot of dial turning.

I was able to tune in to the AM stations here in the US.

One caution: the most accurate adjustment of the master crystal is at the highest reference that you can receive.  There is a multiplication effect the lower the frequency that you use to calibrate.  I would look up a SW am station frequency in your area of the world, and use that.  The alternative is a known good frequency source (signal generator) and use that.

73
Evan
AC9TU

#ubitxv6 frequency calibration #ubitx #v6 #calibration #ubitxv6

eb2elu@...
 

Hi,

I have just received my brand new ubitxv6 full kit and I am experiencing some problems when calibrating  frequency.

These days I couldn't hear any stable station here in Europe so I tried to listen some ham radio colleagues. I could hear a colleague in 7.131 using my other radio gear (yaesu ft-857) but  ubitx frequency for the same signal was 7.129.500. I tried to modify frequency offset in the setup but I didn't notice any changes when I modified the offset to 1500hz. I only notice better results in terms of frequency calibration, by setting a much higher offset but at the expense of hearing  much worse audio quality,lot of noise and much lower volume.

¿What is the right way to calibrate frequency in ubitx v6?

73

Felipe
EB2ELU

Re: Any interest in uBITX Net

Evan Hand
 

Gordon,
That is on my list of planned modes to one of my ubitx.  Even have an EasyDigi kit to build.  Just have not gotten around to doing it yet.

73
Evan
AC9TU

Re: V5 not receiving local am stations

Daniel Flanagan
 

I just put CEC V1.2 on my V5 and it tunes only to just below 3.0 MHz.

On 2/24/20, Evan Hand <elhandjr@...> wrote:
What software are you using on the uBitx?  Stock or another version like
KD8CEC's?

The original software was for 3 to 30 MHz.  CEC expanded to include down to
1 MHz.  Not sure if any versions go below 1 MHz.

Are you trying to tune in a 720 KHz signal?

73
Evan
AC9TU



Re: V5 not receiving local am stations

Evan Hand
 

I checked the source code on Ian's, KD8CEC, github account and found that there are two different limits for frequency limits:
Lines 112-118

// limits the tuning and working range of the ubitx between 3 MHz and 30 MHz
#define LOWEST_FREQ  (3000000l)
#define HIGHEST_FREQ (30000000l)
 
//When the frequency is moved by the dial, the maximum value by KD8CEC
#define LOWEST_FREQ_DIAL  (3000l)
#define HIGHEST_FREQ_DIAL (60000000l)

Based on the descriptions only (I will need to dig in deeper to see if this is true), I would suggest you go to the 80 meter band and tune down manually from there.

The alternative is to change the #define LOWEST_FREQ  (3000000l) to a value lower than the station you want to receive.  Then recompile and download.

73
Evan
AC9TU

Re: Tuning knob

Jack, W8TEE
 

Steve:

From what I can see, these should work fine. However, I'm starting to move away from encoder switches, as most of the stuff I build it QRP-oriented and small. As a result, the project doesn't have much mass, and I find that pressing an encoder switch requires me to hold the unit with the other hand to activate the switch, even with non-skid feet in place. I find myself using NO push button switches now, since they don't require as much force to activate. Just sayin'...

Jack, W8TEE

On Monday, February 24, 2020, 6:08:31 AM EST, Gigabyte <steven.b.hoff@...> wrote:


Evan, 

I only have a little MiniDSO 4 channel. It's this one here: https://amzn.to/32m1Qkr 
Not an electronics guru. I don't use my little scoped that often so I'm not great with it, but I checked it with the DSO. I was getting very bouncy readings on one side of it. It was very random. The other I was getting a regular dip to zero as I turned the dial. So I'm guessing the encoder is bad. 

Encoders look like they're cheap so I was thinking of ordering this pair of them from eBay: https://rover.ebay.com/rover/1/711-53200-19255-0/1?ff3=4&toolid=11800&pub=5575553925&campid=5338625465&mpre=https%3A%2F%2Fwww.ebay.com%2Fitm%2F2X-EC-11-Rotary-Encoder-Digital-Potentiometer-20mm-Knurled-Shaft-with-Switch-USA%2F382783349631%3Fhash%3Ditem591faa637f%3Ag%3AzG4AAOSweEFcYvuH
Will that one I linked work? If so I'll go ahead and order as soon as I hear back from you if that's the correct kind to get. One of the pictures in the auction listing shows a diagram with resistors in it. I'm assuming this is what you were talking about there. 

I have several other Nanos, but they already have have headers soldered on the wrong side of the board. I'll have to get some more without the headers soldered on and solder headers on them. I'm really not the greatest at desoldering things, especially long rows of headers. 

Dean, 

My case isn't grounded right now. It's actually 6 seperate pieces of metal, so it will take me some work to get it all grounded well. This is the case I have: https://amzn.to/2HQEavb
 
The black part in my pictures (white if you look at the Amazon listing) is actually plastic. The front metal panel sits in the plastic. Same for the rear panel. The two plastic pieces on the ends are bolts to the bottom metal pan, and there are two metal rails at the top on each side. Then the metal cover that goes over the top and sides. It was blue and white like in the pictures on Amazon. I painted the plastic black and the metal pieces green. 
 
I did put some star washers on each side of the volume pot and encoder to help it cut into the metal a bit. I'll have to figure out some ground straps or something to ground the different chassis pieces together. 
 

 


--
Jack, W8TEE

Re: Any interest in uBITX Net

Gordon Gibby
 

You guys might want to get to know J. S. 8



On Feb 23, 2020, at 20:43, Evan Hand <elhandjr@...> wrote:

Thank-you all for the information.  I am sure you are hearing the IC-7300 running 100 watts.  Not the real test we are trying to do.

I could hear others calling John (KO4BSW), but could not hear John at all.  I am sure there is an issue with my location and antenna in my attic.  I live in an HOA controlled neighborhood and cannot put up a decent antenna.  Even so, I have so much QRN and QRM that it would still be an issue.

The best connections I have had with the uBitx have been on 20 meters.  Seems that during the time that most of the noise is down is during the day, and 40 meters does not seem to propigate well using my antenna.

We can try again next Sunday.  I will also try to monitor at 3 Eastern during the week, though that will be spotty as I have a number of doctor visits and errands coming up.

Let me know of someone would like to try 20 meters.  Time and frequency.

73
Evan
AC9TU

Re: V5 not receiving local am stations

Maurice Bersan <Vk6hly@...>
 

Evan
I am using CEC v1.2. yes I am trying to tune into 720khz. It's our local ABC. 
Maurice

Re: Any interest in uBITX Net

Jay - WS4JM
 

I'll try to make it next Sunday Also

Jay
WS4JM

Re: V5 not receiving local am stations

Evan Hand
 

What software are you using on the uBitx?  Stock or another version like KD8CEC's?

The original software was for 3 to 30 MHz.  CEC expanded to include down to 1 MHz.  Not sure if any versions go below 1 MHz.

Are you trying to tune in a 720 KHz signal?

73
Evan
AC9TU

uk builders

dave
 

hi just finished my v 6 and i am very pleased with it . i was wondering what fellow builders are using as a case for the ubitx  as i dont fancy paying 60 £ for a casa from india  best wises  dave  c

Re: #ubitx-help #v6 #audiocircuit #v6 #audiocircuit #ubitx-help

Daniel Wise
 

Richard,
I just noticed that in the schematic. I have made the connection but now there is very distorted audio. Did you have to adjust the power switch / volume pot on the v6 board as well?

Re: Tuning knob

Gigabyte
 

Evan, 

I only have a little MiniDSO 4 channel. It's this one here: https://amzn.to/32m1Qkr 
Not an electronics guru. I don't use my little scoped that often so I'm not great with it, but I checked it with the DSO. I was getting very bouncy readings on one side of it. It was very random. The other I was getting a regular dip to zero as I turned the dial. So I'm guessing the encoder is bad. 

Encoders look like they're cheap so I was thinking of ordering this pair of them from eBay: https://rover.ebay.com/rover/1/711-53200-19255-0/1?ff3=4&toolid=11800&pub=5575553925&campid=5338625465&mpre=https%3A%2F%2Fwww.ebay.com%2Fitm%2F2X-EC-11-Rotary-Encoder-Digital-Potentiometer-20mm-Knurled-Shaft-with-Switch-USA%2F382783349631%3Fhash%3Ditem591faa637f%3Ag%3AzG4AAOSweEFcYvuH
Will that one I linked work? If so I'll go ahead and order as soon as I hear back from you if that's the correct kind to get. One of the pictures in the auction listing shows a diagram with resistors in it. I'm assuming this is what you were talking about there. 

I have several other Nanos, but they already have have headers soldered on the wrong side of the board. I'll have to get some more without the headers soldered on and solder headers on them. I'm really not the greatest at desoldering things, especially long rows of headers. 

Dean, 

My case isn't grounded right now. It's actually 6 seperate pieces of metal, so it will take me some work to get it all grounded well. This is the case I have: https://amzn.to/2HQEavb
 
The black part in my pictures (white if you look at the Amazon listing) is actually plastic. The front metal panel sits in the plastic. Same for the rear panel. The two plastic pieces on the ends are bolts to the bottom metal pan, and there are two metal rails at the top on each side. Then the metal cover that goes over the top and sides. It was blue and white like in the pictures on Amazon. I painted the plastic black and the metal pieces green. 
 
I did put some star washers on each side of the volume pot and encoder to help it cut into the metal a bit. I'll have to figure out some ground straps or something to ground the different chassis pieces together. 
 

 

Re: Portable antenna(s) #antennas #v6

Tom, wb6b
 

Hi,

I just discovered this while searching for antenna information.

https://www.sciplus.com/quartz-crystal-antenna-48656-p

A genuine "Quartz" antenna. Looks like some rocks in a box to tie the ends of your antenna to so they won't blow away. 

That would certainly work better than if your antenna was blown down by the wind and laying on the ground.  There must be a quartz tuner to go with this antenna, though. 

Tom, wb6b

Re: V5 not receiving local am stations

Maurice Bersan <Vk6hly@...>
 

Hi Evan, I forgot to mention in my post but all other bands rx and tx work  just fine. I'm sure I tried to zero beat 720 back when I was calibrating my V5. Just not receiving MW any longer.
Maurice.