Keyboard Shortcuts
Likes
Search
100 ALC and 0.0w on transmit, no matter the antenna/TX power/band/mode
#projects
|
Hi all,
?
I am having troubles with an X6100. The unit receives fine, but upon initiating a tuning cycle, the power drops from a hair over 0.0w to 0.0w rapidly and ALC goes to 100. This persists when attempting to use any phone modes. I can hear the matching circuits click, and there's no indication the tuning cycle fails at all. Additionally, when attempting to TX, the light goes red and I can again hear relays in the radio click. My voice modulation does appear on the spectrum, but power remains at 0.0w and ALC stays at 100 despite that.?
?
My understanding is that this means, for whatever reason, the radio just isn't passing modulation onto the RF amplification stage, which would be a software issue, but I've none the less verified all cables and connectors internal to the radio are connected and appear functional. There's no sign of blown finals. This persists, even on R1BCU firmware and after a factory reset.?
?
For context, I'm running a random wire which should be tunable for the X6100, in addition to a couple of resonant dipoles that I have verified with a VNA would not require tuning and should not cause the unit to fold back power.
?
Any help troubleshooting is greatly appreciated. Unfortunately, this unit is used so I do not know when this problem began (although I was told the former owner did not have any issues). |
|
Hi!? That sounds exactly like the experience I went through with my X6100 unit. I bought it second-hand (like you), it still had a valid warranty and the former owner also told me he didn't have any similar issues before. Immediately after taking it out of the box, the device had the EXACT same symptoms as yours: a trace of modulation on the waterfall, ALC at 100%, and 0.0W output from the power stage. These symptoms were present with both the original firmware and the R1BCU. Because of the valid warranty and the seals on the casing, I decided not to attempt further diagnostics on my own. I chose to send the device back for service. At first, I suspected damage to the power stage, but in the service, the power stage was diagnosed as functional. Since the technicians didn¡¯t really know what else could be damaged (the service manual from Xiegu is very limited), I received a new, working unit under warranty. After some time, I also received information from the service that the problem was related to incompatible APP and BASE software version, although this was strange to me because even before I sent the device to the service center, I tried all sorts of software upgrades and downgrades and it didn't change nothing. In summary, it's not entirely clear what happened; the problem is probably software-related, although I'm unable to give you specific instructions on how to deal with it. While searching through X6100 user communities, I found another similar-looking case on the X6100 user group on Facebook. Good luck, and let me know if you manage to sort this out. My X6100 is working smoothly now, but not sure how long. niedz., 25 sie 2024 o 22:50?Skylar Culek KD9WYX via <skylarculek=[email protected]> napisa?(a):
|
|
Verify the Red TX light is on when keying the
Mic or transmitting via computer control.
? Check the output power using the NFM
mode.
? Check setting of TX POWER in the RADIO
SETTING1 Menu.
? If using SSB Voice, check the I-MIC GAIN / HMIC GAIN setting (depending on the
microphone you do use) in the RADIO
SETTING1 Menu.
? Verify that Split operation (SPL) has not been
enabled and forcing the transmit frequency
to be out of band.
? If running a soundcard digital mode, verify
that the mode is set to U-DIG to route audio
into and out of the radio. |
|
Bummer. I had a similar problem and it turned out to be the SPL setting On Sun, Aug 25, 2024, 3:30?PM Skylar Culek KD9WYX via <skylarculek=[email protected]> wrote:
|
|
I learned that the ALC meter is "backwards" in that it shows 100 when there is no power and down at 4-10 when pwr out is 4+ watts.
In my case it was fixed by increasing the audio output from the terminal program to the rig.
I'm using FT8cn Android app, so it was a matter of going to my Android phone app and selecting SETTINGS, then SOUND, then selecting MEDIA and increasing the slider to 100%, and then all is well, rig output is 3-7 watts during xmit of tones and ALC number runs low tween 1 and 10, again variable as tones go through.
I think WSJTX also has a xmit "pwr" slider on the lower right side of screen.? Push it all the way up and then give it a try.
Hope this helps
--
de Herb - WB8BHK Mt Gilead, OH |
Herb