--
Alex Netherton, W5ALX
Buncombe County NC, EM85ro

Wouldn’t it work to insert it between audio connector for volume control high side and the control?

You will need to provide the details on the uBitx: version, any extra addons, etc.?

Best choice is to just remove and reinstall the display.

73
Evan
AC9TU

开云体育

thinking about this the picture was rightside up when i first connected to as i had it in the panel and was working.
what might have happened?
dave

开云体育

is there a way to turn the picture over on the display.

apparently? i mounted the display upside down.
you would have thought that the? labels would be right side up when mounted but i guess not cause the picture is wrong now.

dave k7da

Hi,
The onboard LM386 is still used but I have taken the output to the input of the sotabeams filter, the sotabeams filter has two outputs so used the circuit provided by sotabeams (it is on their website) this new LM386 pzrovides the speaker output. The only problem is that you now have two volume pots, one sets the input of the filter so that the red led just starts flickering, the other sets the main volume.
Problem 2 was, no room in my case for a second 10k pot.
Problem 2 solved by AliExpress in the form of a dual 10k pot with separate coaxial shafts. made up a couple of knobs to fit, back one sets filter input, front one sets main volume. You can buy the pair of knobs but I had the facilities so made my own.
the track that needs to be broken is the audio out pin of the analogue connector on the front panel stereo socket board, this is the brown wire, the track goes to the phone socket.
take the audio output from the brown wire (now isolated) to the input of the sotabeams filter. the new speaker out from the second LM386 goes to the other side of the break i.e the phone socket.
mMy second lm386 was built on a piece of perf board 4.5cm by 2.5cm or 10 holes by 16 holes. The sotabeams filter sits in the bottom of a small plastic box 6cm * 5cm * 2.5cm, the amp board sits on top of the filter
with a piece of credit card plastic between the two. Just make sure the pushbutton on the filter board is not pressed.( i made a small cut out in the plastic!)
i used a spare 8 way wired connector that came with the enclosure box to plug onto the filter board, the other two pins 9 and 10 , 9 is not used 10 is another earth so not really needed, i used this pin to connect the two led's to ground. Sounds a lot worse than it is, I mounted the box as near the front panel, left side looking from front, as possible to keep the wiring short .
Howard G4GPF

Here's a corrected version of that chart showing how TXA,TXB,TXC get mapped to specific bands.
Corrections are:? 30m should read 10m for 30mhz,? ?and? "else c=0 for 40m, else 80m".

Note that the 10m LPF also handles 12m and 15m, the 20m LPF also handles 17m,
the 40m LPF also handles 30m,? and the 80m LPF also handles 60m, true for all versions.
I've added a third line to show Allison's hacked v3,v4 board, which fixes the LPF harmonics.
The symbols a, b, and c refer to signals TXA, TXB, and TXC from the Nano out to the three LPF relays.


##########################
Here's what the routine setTXFilters() does in the firmware for v3,v4,? and? v5,v6.? Also v3,v4 with Allison's hack:
On Wed, Jan 15, 2020 at 08:25 AM, Jerry Gaffke wrote:

I've been having fun with my V6 uBITX on the air while I'm waiting on some revised prototype boards to arrive from China.? I'm mainly a CW op and and that usually works best QRP anyway.

Worked K9CT on 40 a couple days ago (got him first call), W3R on 20 yesterday (again, first call) and just a few minutes ago worked W1VE on 20 meters.

My antenna is an end fed Zepp QRP antenna (PAR EndFedZ) and it's only 15 feet off the ground plus it's only about 3 feet above the roof of my house.? I use it mainly for testing when I'm working on things like the uBITX.

I was also using our TSW Teensy 4.0 to NANO plug in adapter on the Factory supplied V6 Raduino.? For the CW ops out there having problems with the keyer timing in the stock firmware, you might consider changing over to the Teensy 4.0 and our latest firmware (available from TSW) as the keyer operates like it should with decent timing.? TX starts immediately on the first character element and if you set CW Delay to 200-250 milliseconds, it comes back to RX fast enough that you don't lose the other guys first character.

All the details are on the TSW website - .? Using the adapter, you might have to bend the 7805 regulator slightly toward the bottom of the factory V6 Raduino in order for the bottom edge to clear the heat sink on the 7805 (Factory has it a bit too close to the NANO socket).

I've been running the rig on the air configured like this for quite some time now and have run into no issues at all regarding the Teensy 4 replacing the NANO as the CPU.? Nice thing is the Teensy 4.0's available program space is only 2 percent full whereas the NANO with current software is around 90 percent full.? Add much more to the NANO's program and there won't be enough room for the program to operate properly.?

Some people are balking at the $19.95 price of the Teensy 4.0 but yet they are willing to spend quite a bit more than that for the NEXTION display which won't fit the mounting holes of the factory case (so they have to modify it anyway) and also the NEXTION's connections are not really "plug and play" either.?

Using the Teensy 4.0 to NANO adapter is about as close to plug and play as you can get except for the need to use a separate key jack for the paddles.? If you don't use the keyer, and just use a hand key or plug in an external keyer you can use the PTT contacts on the microphone connector and you don't have to modify your pretty case.?

No matter what you do there are going to be compromises that will have to be made if you want to really speed up the display and allow for the ILI9341's available font libraries to be used.?

We've kept the screen close to what was original with a few useful additions and ours doesn't take 3-4 seconds to paint the display.? Also ours doesn't repaint the entire display every time you change something and doesn't "blink" when tuning or touching an on-screen button.? This is one of the real advantages of a 600 MHz processor vs the MUCH slower NANO.

Just food for thought ----

Jim, W0EB
TSW Project Coordinator

That EEPROM thing is inside the ATMega328P processor chip used on the Nano.
? ??http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-7810-Automotive-Microcontrollers-ATmega328P_Datasheet.pdf
It's 512 bytes a of a special kind of memory that that is easy to write to,
but sticks around when power is off.

Jerry

Glad you found it.

Ideally, all firmware would have sanity checks on critical values stored in firmware,
ignore them if they are out of bounds.
And there should be an easy and obvious menu entry to revert to reasonable default values from flash.

Jerry, KE7ER
?

Firmware for a v3 or v4 board mistakenly installed on a v5 or v6
would seriously attenuate 80 and 40 meters, but 10 and 20 meters should be unaffected.
Operation on 80 and 40 would be as if the antenna was disconnected, might damage the IRF510's.

Firmware for v5 or v6 on a v3 or v4 board would allow harmonics out on 80 and 40 meters
since only the 30m filter would be getting used, but again 20 and 10 meters are unaffected

Here's what the routine setTXFilters() does in the firmware for v3,v4 and v5,v6 boards:
To get the symptoms reported (particularly an attenuated 20m) would require two different problems
out in the LPF's.? ?Possible, but seems more likely to be trouble further back in the power amp somewhere.

He reports that CW transmissions are also affected, so not an issue of anything prior to the first mixer at D1,D2.

Jerry, KE7ER

If you are referring to the KD8CEC stand alone s meter and spectrum analyzer, it is on the Hams Key Blog. the latest is here:



Otherwise you can search Hamyskey blog, the messages section in this group, or ubitx.net for other sources.

73
Evan
AC9TU

going to fit a sotabeams? cw filter to my ubitx v5 ,where can i insert this on the board (before lm386 amp) if any one has done this what tracks will i need to break into as i would ike to fit inside the case?? many thanks dave c

anyone got a bix40 pcb bare or (partially) populated they want to part with? dave c? gw0nvf

I have the same question did you ever get a answer?

Mike