#qdx no transmit on 80m 60m and 40m #qdx


Bernd DL2NEA
 

Hi,
i build the QDX Rev4 for 9V. Only on the 40m, 60m, 80m bands at transmiting the current stays at the receiving level (about 130mA) and the LED blinks in the 2 times rythm. Antenna is a dummy load.
With the build in transmitting test when pressing 't' the current increases on all bands to about 1A.  FT8 operation on 20m Band was succesfully tested.
Any idea where to start troubleshooting ?

Bernd DL2NEA


Hans Summers
 

Hello Bernd

Please read operating manual section "5. Troubleshooting Transmit issues" at page 44 which describes this issue and its solution. 

On Thu, Nov 24, 2022 at 5:07 PM Bernd DL2NEA <dl2nea@...> wrote:
Hi,
i build the QDX Rev4 for 9V. Only on the 40m, 60m, 80m bands at transmiting the current stays at the receiving level (about 130mA) and the LED blinks in the 2 times rythm. Antenna is a dummy load.
With the build in transmitting test when pressing 't' the current increases on all bands to about 1A.  FT8 operation on 20m Band was succesfully tested.
Any idea where to start troubleshooting ?

Bernd DL2NEA


Bernd DL2NEA
 

Hello Hans,

yes it works and i am happy - thanks for the hint to read the troubleshooting again.

Now i found out that the PWR slider in WSJT-X is individually on each band !

So i started with 20m Band put the PWR Slider to the maximum as described in the manual and
then never look again to slider because it works on 20m.
My fault - thanks for the fast reply.

73 de Bernd DL2NEA


Hans Summers
 

Thanks Bernd

That's new info to me, I didn't know that either! 

73 Hans G0UPL
http://qrp-labs.com
https://www.buymeacoffee.com/g0upl


-------- Original message --------
From: Bernd DL2NEA <dl2nea@...>
Date: Thu, Nov 24, 2022, 8:08 PM
To: QRPLabs@groups.io
Subject: Re: [QRPLabs] #qdx no transmit on 80m 60m and 40m
Hello Hans,

yes it works and i am happy - thanks for the hint to read the troubleshooting again.

Now i found out that the PWR slider in WSJT-X is individually on each band !

So i started with 20m Band put the PWR Slider to the maximum as described in the manual and
then never look again to slider because it works on 20m.
My fault - thanks for the fast reply.

73 de Bernd DL2NEA


Alan G4ZFQ
 

On 24/11/2022 18:58, Hans Summers wrote:
That's new info to me, I didn't know that either!
There is a tick box on the Audio setup pane. Unticked by default.

73 Alan G4ZFQ


Bernd DL2NEA
 

Thanks Alan for this additional info.

73 de Bernd DL2NEA