Date   

Re: Electronic encoder (Not rotary)

Gerard
 

Evan,

My Si5351 generator is a plug-in module. See exemple
Maybe the resistor are on it? the module diagram should be. If someone have it.
To check, in any case it would cost not to add the 2 resistors on the connections in question.

When I did the editing, I had looked at all the problems a bit and so I did the modifications for the connection (self, etc.)
There, it’s still very comfortable. only a light click as soon as a digit changes.

My idea was to see if it changed anything by doing the same assembly on the TX and RX lines of the Nextion to Arduino + evently lines SDA and SCL
module example:
https://www.amazon.com/Comimark-CJMCU-5351-Si5351A-Generator-Breakout/dp/B07X39J647/ref=sr_1_2?dchild=1&keywords=si5351&qid=1603614841&sr=8-2

cdt


Re: uBITX V4 assembly instructions? #v4

 

Hi Chuck,

There are instructions right here in the wiki section:

https://groups.io/g/BITX20/wiki/5696

Write back if you have any questions.


uBITX V4 assembly instructions? #v4

Chuck WB6GPO
 

My uBITX V4 has been sitting in the shipping box until now.  I no longer see the assembly instructions on the hfsignals web site.  Is there some way I can find them?

Thank you,

Chuck WB6GPO


Re: My son's V6

Bob Lunsford
 

Using a tuner on an antenna that is designed/dedicated to a specific band or frequency would theoretically funnel the signal to that specific frequency but it would also, theoretically, suppress received signals up and down frequency from the tuner's settings. Since it is also a good approach to getting as much power as possible from a QRP radio to the antenna by allowing the transmitter's output stage to see a much better load and lessen the complications of a mismatch, it would/should be an automatic part of the system unless weight or system complexity are concerns. It is undoubtedly a prime candidate for experimentation to see if a tuner does indeed reduce the influence of a high powered transmitter either nearby in frequency or location.

Thanks, Curt, for your feedback on this. Sometimes a simple solution may be best even if not a complete solution. I agree that AGC may be nice but it is not always the best or necessary. For example, on my G90 if you turn off the AGC it reveals many weak stations and even if some others come booming in, it's a small price to pay to guarantee that all stations on the [net] frequency are heard. Unless it is truly excessive in volume, of course, and this is "in the ear of the hearer."

Bob — KK5R

On Saturday, October 24, 2020, 8:07:04 PM EDT, Curt via groups.io <wb8yyy@...> wrote:


Bob

using an antenna tuner is a decent step to evaluate the overload issue - and at least one user reported success with this technique.  I would exercise the tuner to see if it can reject the overload.  if this is successful, the the challenge is tuning it for the band of interest - and seeing if it still has rejection. 

if a high pass filter is needed -- this video discusses solutions - and I see W8TEE has illustrated one as well.  I did not do a thorough search to see what solutions are around.

the matter of AGC is much more of a creature comfort - less critical.  I don't have monster sized antennas here - my ubitx does not overload from ham signals, and the VK3YE AGC does very well at suppressing the large ones.  I would not work too hard to implement AGC as its a small impact to the overall rig behavior. 

73 curt


Re: My son's V6

Curt
 

Bob

using an antenna tuner is a decent step to evaluate the overload issue - and at least one user reported success with this technique.  I would exercise the tuner to see if it can reject the overload.  if this is successful, the the challenge is tuning it for the band of interest - and seeing if it still has rejection. 

if a high pass filter is needed -- this video discusses solutions - and I see W8TEE has illustrated one as well.  I did not do a thorough search to see what solutions are around.

the matter of AGC is much more of a creature comfort - less critical.  I don't have monster sized antennas here - my ubitx does not overload from ham signals, and the VK3YE AGC does very well at suppressing the large ones.  I would not work too hard to implement AGC as its a small impact to the overall rig behavior. 

73 curt


Re: Electronic encoder (Not rotary)

Evan Hand
 

Gerard,
Jack is talking about the SDA and SCL lines to the Si5351a clock chip.  Here is the original Raduion schematic for reference:

Note R13 and R14 are pull up resistors on the SDA and SCL lines to the Si5351a chip.  They are missing on your schematic of the Raduino section (page 3).

73
Evan
AC9TU


Re: Electronic encoder (Not rotary)

Evan Hand
 

Gerard,
There are two places that adding a resistor and capacitor filter like this would help
https://groups.io/g/BITX20/message/30226
The first is in the 12volts feeding the Raduino, the second is in the 5volts feeding the Nextion display.  The 10 ohms also helps with any backlight display noise when the brightness is turned down on the Nextion.

I am glad that the capacitors and pull up resistors on the encoder helped with the tuning clicks.  That to me supports the idea that rapid frequency changes could have caused the clicks.  With the Nextion power filtering (the capacitors and resistor) that should reduce the frequency.  

Anyway, glad you found a solution.
73
Evan
AC9TU


Re: noise reductor / squelch ?

Gerard
 

hello,
All electronic schemas are welcome

cdt


Re: noise reductor / squelch ?

JD Hill
 

Hello all. I rarely post, but would an RF Gain control do what you are looking for?
That would be my suggestion.

72,
Jimmy,  W9JDH


Re: Electronic encoder (Not rotary)

Gerard
 

Jack,
I put the diagrams of my house Ubitx
You can then see this story of resistor.
cdt


Re: Beautifull Ubitx?

Curt
 

The cool thing about the ubitx is we don't have to agree - we can each build it our own way.  Glad to see that hams around the globe can experience this rig.  Some may wish to operate the rig remotely - it fact its a cool idea for those who regularly receive on WSPR - they can remotely change the band it is listening on.  Just like I don't get those who chat via a wireless hotspot - to experience human-to-human QSOs - while some of us prefer the fickle ions.  enjoy whatever however.  73 curt


Re: Beautifull Ubitx?

Jack, W8TEE
 

The Bluetooth capability of the ESP32 seems pretty good and there's some libraries to use it.

Jack, W8TEE

On Saturday, October 24, 2020, 1:05:08 PM EDT, Bill Cromwell <wrcromwell@...> wrote:


Hi.

Not for me but wifi would allow remote access via the internet. There
are other ways that would be less vulnerable to hacking in my thinking.
I am considering bluetooth for some remote operations on my own
property. I don't feel the need for remote access from Timbuktu but
there are hams who do want that kind of access and for various reasons.

No two of us are alike and we should be thankful for that. What an awful
world if everybody else was just like *me*!

73,

Bill  KU8H

bark less - wag more

On 10/24/20 12:37 PM, Aaron K5ATG via groups.io wrote:
> Not understanding the need for WiFi on a radio.
> --
> '72
> Aaron Scott
> The K5ATG Blog <https://k5atg.blogspot.com/>
> Mid-Del Amateur Radio Club <http://www.w5mwc.org/>
> QRPARCI# 16443
> GQRP# 16389
> 4SQRP # 1080
>






--
Jack, W8TEE


Re: Beautifull Ubitx?

Bill Cromwell
 

Hi.

Not for me but wifi would allow remote access via the internet. There are other ways that would be less vulnerable to hacking in my thinking. I am considering bluetooth for some remote operations on my own property. I don't feel the need for remote access from Timbuktu but there are hams who do want that kind of access and for various reasons.

No two of us are alike and we should be thankful for that. What an awful world if everybody else was just like *me*!

73,

Bill KU8H

bark less - wag more

On 10/24/20 12:37 PM, Aaron K5ATG via groups.io wrote:
Not understanding the need for WiFi on a radio.
--
'72
Aaron Scott
The K5ATG Blog <https://k5atg.blogspot.com/>
Mid-Del Amateur Radio Club <http://www.w5mwc.org/>
QRPARCI# 16443
GQRP# 16389
4SQRP # 1080


Re: Electronic encoder (Not rotary)

Gerard
 

On Sat, Oct 24, 2020 at 06:34 PM, Jack, W8TEE wrote:
No, I was just working on a project that used the clock and data line (A4 and A5) for the interface to the Nano. If the schematic you're using has the resistor in place, I'm sure it's a no-harm, no-foul situation on the pin modes.
 


Re: Beautifull Ubitx?

Aaron K5ATG
 

Not understanding the need for WiFi on a radio.
--
'72
Aaron Scott
QRPARCI# 16443
GQRP# 16389
4SQRP # 1080


Re: Electronic encoder (Not rotary)

Jack, W8TEE
 

No, I was just working on a project that used the clock and data line (A4 and A5) for the interface to the Nano. If the schematic you're using has the resistor in place, I'm sure it's a no-harm, no-foul situation on the pin modes.

Jack, W8TEE

On Saturday, October 24, 2020, 12:11:15 PM EDT, Gerard <kabupos@...> wrote:


Jack,
Now I’m a little lost
A4,A5? We are talking about the concordance of RX and TX with the Arduino?
I don’t know about the statement
I simply used the file of KD8CEC /Ubitx V234/Nextion CEC 1.2 NX.HEX because it corresponds to my hardware (Filter 12mhz)
I am not a programmer, you should probably look in Ubitx V4.3 code?
May you verified?

Otherwise for the encoder it satisfies me


cdt

--
Jack, W8TEE


Re: Beautifull Ubitx?

Gerard
 

Already I see shielded wires on the connections and a lot of ferrite


Beautifull Ubitx?

Gerard
 

hello,
 I think I just spent my Saturday on the net to solve one of my pb.
I came across this site
Go to see his Ubitx
I found his Ubitx impressive.
This might give you some ideas

http://mw0uzo.co.uk/index.php

cdt


Re: Electronic encoder (Not rotary)

Gerard
 

Jack,
Now I’m a little lost
A4,A5? We are talking about the concordance of RX and TX with the Arduino?
I don’t know about the statement
I simply used the file of KD8CEC /Ubitx V234/Nextion CEC 1.2 NX.HEX because it corresponds to my hardware (Filter 12mhz)
I am not a programmer, you should probably look in Ubitx V4.3 code?
May you verified?

Otherwise for the encoder it satisfies me


cdt


µBITX-V6 - A simple solution for S-meter and also for AGC derived from IF. #smeter #v6 #ubitxv6

IW4AJR Loris <lorisbollina@...>
 

Some time ago I was reading an old article of a USA HAM and, having an old CA3089 in the drawer, I got the idea of ​​developing a small circuit to take the reception signal from the µBITX IF and obtain a good DC signal to drive a Smeter or an ADC input of the ATmega328 on the NANO.
A couple of clarifications:
1) To drive an ADC input of the NANO via the output S.mt. it is necessary to put in parallel a 5V ZENER diode, to prevent the voltage level from exceeding the maximum allowed by the ATmega328.
2) To drive an analog Smeter it is necessary to connect it between the S-mt output. and ground with a 100kΩ trimmer in series to the positive of the indicator for calibration.
3) The voltage level of the AGC works in negative, that is, it is high for low signals and tends to zero for strong signals (as is seen in the data sheet table included), obviously this factor must be taken into account to drive a MOS attenuator of the type designed by ND6T, but it can be used directly on a PIN diode attenuator placed in series to the rx signal.
4) The IF-IN input must be taken from the CW-2 connector directly connected to the IF output of the µBITX motherboard.
5) The Vrx power supply must be connected to the RX power supply of the µBITX motherboard.
6) The CA3089 is easily available on e-bay (I have personally checked this and bought a couple), but you can also look for one of the many equivalents indicated in the Cross Reference of the diagram.
Obviously, the circuit can be used on all receivers that have the possibility of taking a medium frequency IF signal.
Greetings to all ... 73 de IW4AJR

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