I have been using FT8 with my uBitX with CEC software for some time on those bands.

However when I upgraded to WSJT-X 2.2.2 the cat control stopped working. Apparently there is a bug in WSJT-X and it might work if you set it for FT-857 although I went back to using version 2.2.0

Hi Tom,

You might try loading my build on there. No hardware mods, but I did just test R1.5.0 with WSJT-X v2.1.2 and was able to transmit multiple cycles.

If you have the same problem running my build, then my next bet would be that somehow the RF is getting back into your rig and messing with the Nano's operation, locking it up or something.


Reed

New ubitx v6 with stock firmware works fine with FT8 on all but 3 bands.? 10m, 12m, 15m, 17m, 20m, & 40m all work fine (even 160m works fine with external LPF).? But 30m, 60m, & 80m won't TX correctly with WSJT-X for me.? Has anyone else successfully done FT8 on those 3 bands?? My problem is the same on all 3 bands.? TUNE works fine with TX.? But TX works once with TX light and power output.? But at the end of the TX duty cycle, output power stops (as it should), but the TX light stays on continually and output power never comes on again.? Unplug USB & power off/on just repeats symptom.? TUNE fine but regular TX only once.? Just 30m, 60m, 80m with problem.? DEBUG#1: Turn off radio & watch TX light.? TX goes on and off correctly with each TX & RX duty cycle (obviously no power out).? Works correctly until you turn on radio, then "lock up" behavior starts again.? DEBUG#2: Swap out new v6 radio with an older ubitx v3 & Ian's firmware and it works fine on those 3 bands with same WSJT-X software.? Older ubitx works on all bands.? I haven't had a chance to do DEBUG#3 yet: change out v6 display to Nextion & load Ian's firmware.? I was just wondering if anyone else has seen this issue?? Or if I'm missing something obvious?
Thanks!
Tom
AB7WT

Hi Reed,

I was going to point out that without the feet it will fit in that 3.5 inch height. I hope it is not too wide to fit a rack <evil grin>.

73,

Bill KU8H

bark less - wag more

Also note that the feet are optional.


Reed

Maybe this pic will help.


Reed

hello.
I try both..?

Last, with this faults..

I will assume that you have the input and output measurements reversed. Even with that modification, the output pin of U2 (the 78Lo5ACZ) should be 5volts +/- 0.15volt.? There is something wrong with either your measurement, the regulator is bad, or there is something else pulling the voltage higher than it should be.? It is a surface mount device, so tricky to replace without a hot air surface mount rework station.

As far as I can tell, the input is to the right of U2, and the output is to the left as shown in the board picture I sent before.? The center pin is at ground, 0volts.

You can measure the drains of the IRF510s on the large tab connected to the heatsinks.? The 12volts is there all of the time.? You do not need to key the PTT switch to take the measurement.? Switching the gate bias off puts them in a high resistance mode, such that only a few milliamps of current is drawn for both of the devices.

Double-check the U2 voltages.? If you are truly getting almost 8 volts on the output of the regulator there is something really wrong with the circuit.? My only suggestion is to order a replacement before you try to remove it for testing.? When ordering get the IRF510s as well.? I believe that you will need to pull them to verify that they do not have a drain to gate short that is pulling the regulator output up.? Do this before you try to remove U2.? If that is the cause of the U2 output voltage being over 5volts, then with both IRF510s removed you should get 5volts on the outpput of the U2 regulator.? Replace the IRF510s if that is the case.

There are others on this board who will do the repair that have the proper tools and experience.? I have done this type of replacement once (I thought I had an issue with one of the BAT54SL used in the product detector, that is the only removal experience. I had 4 transistors to install in a filter kit that were surface mount that went well), however I am not confident on my capabilities to work on someone else's uBITX, even at no charge and the owner taking all of the risk.? The best option would be to find a nearby ham or club that could help with the measurement and problem solution.

Hope the above helps, and good luck in finding and fixing the issue.
73
Evan
AC9TU

Hi Evan,?
Thanks for your help. It's okay.?

73
Bora
--
TB3EN From Turkey. Electronic Communication Technician, Member YM3KM.

Here are the measurements that I have.?
INPUT: 7.87
OUTPUT: 12.85
That may be backward as to what you were wanting, I determined the pins from the datasheet that I found here:?
I could not test the IRF510 PA MOSFETs because it was this time that gravity decided to ruthlessly attack my multimeter and hurled it to the floor and breaking it. I hope to have a new meter by the end of the day and I will test the IR510 PA MOSFETs then.?
--
'72

V4 with mods to add JackAl board. All parts that come with it, and W0EB Raduino clone.

$80 OBO?

mike
AI4NS

Hello Ken,
do you use Arduino IDE or UECIDE?
搁补尘ó苍

There is a capacitor on the output of the LM386 audio amp, so not sure if it matters.? Wiring as Edward suggests would work, as long as it is a stereo plug.

73
Evan
AC9TU

开云体育

I stand corrected tip and ring are (+), sleeve (-)

开云体育

The tip would be positive (+) audio, the ring negative (-) ground. Hope that helps you.

The mono audio is connected to both the Tip and the Ring with the Sleeve being the ground return.? This was done so that you would hear the audio in both the left and right headphones when stereo headphones are connected.? You MUST use a stereo TRS plug to wire it, or you will short out the audio signal.

73
Evan
AC9TU