QDX #40m #qdx #manual RFSweep waveform different to manual #qdx #manual #40m


Mark ZS6MDX
 

Thanks Alan, much appreciated, will check these on the weekend and hope that sorts it out... A great build otherwise!


On Thu, Dec 9, 2021 at 9:56 AM Alan G4ZFQ <alan4alan@...> wrote:
> QDX is built and firmware loaded, on dummyload the RF Filter sweep (top)
> looks quite different than the example in the manual (v 1.06 page 89)  -

  Mark,

Assuming v 1.02 is loaded then maybe something in the BPF or LPF.

Do you have TX power on all bands? If not any band maybe LPF switching
or bad joint in common path.

The RF sweep checks LPF and BPF so if TX is good then maybe a bad joint
on L12.

73 Alan G4ZFQ








--
Mark Walker
+2782 385 2688


Alan G4ZFQ
 

QDX is built and firmware loaded, on dummyload the RF Filter sweep (top) looks quite different than the example in the manual (v 1.06 page 89)  -
Mark,

Assuming v 1.02 is loaded then maybe something in the BPF or LPF.

Do you have TX power on all bands? If not any band maybe LPF switching or bad joint in common path.

The RF sweep checks LPF and BPF so if TX is good then maybe a bad joint on L12.

73 Alan G4ZFQ


Mark ZS6MDX
 

Hi

QDX is built and firmware loaded, on dummyload the RF Filter sweep (top) looks quite different than the example in the manual (v 1.06 page 89)  - any ideas? 

Appreciate any help 

73's

Mark ZS6MDX