Hi Band Kit display disagrees with wattmeter

[W4PUO]

Hello, all troubleshooters; this is my first time showing a problem on Forum though I have been working with this amazing rig for nearly 7 months. My first purchase was an Orange Lo Kit. I made a few QRP contacts and ordered a DL2MAN printed 3.7v x 3 battery pack for walk around. Next I bought a pre-assembled Army Green Lo unit to compare performance, etc. I am showing the Pwr/Eff readings for both in the chart below: All rigs on F/W 2.00i
Green Lo (Assembled at New Diy) 12.5 VDC Gel Cell Band M Pwr W Eff %
20 3.8 76
30 3.5 81
40 3.5 81 60 3.7 80 80 5.9 79
Orange Lo Kit__________________________________________________________________
20 5.8 85
30 3.8 87
40 3.8 87
60 4.6 89
80 5.3 88
Here is my problem: a recent build of a Hi Band Kit _______________________________
20 0.00 0.00
17 0.10 0.19
15 0.05 0.37
12 0.04 0.58
10 0.06 0.61
Also, the Hi Band Kit using MFJ watt/swr meter
20 2.2
17 3.0
15 4.0
12 3.2
10 2.8
Question: Where should I be looking on the Hi schematic/circuits. Which filter parta could be at fault?
Some other reason for the low Pwr/Eff readings? Any suggestions would be appreciated. /Lee @W4PUO.
Oops, my format problems. anyhow, maybe you can catch the problem with the displayed pwr/eff.

[kg6yj]

Schematics can be viewed and downloaded from this page:
https://dl2man.de/2-trusdx-assembly/

The schematics show which toroid has how many turns to be winded.

On the same page, "A Video on Filter Tuning" should be viewed and followed to tune each band's toroids. Adding or subtracting 1 or 2 turns may be needed for specific band. Lx2 toroids (for HD2 supression) may have big impact on output power, although LX1 toroid tuning is also needed for output power. I can share more detailed information if needed.

Happy tuning and good luck,
73 de KG6YJ, Jun

[TangoBravoMike]

Your external wattmeter indicates the transmitter is producing power. So you seem to have a problem with power sensing.

On the schematic for the RF board, find the sensing circuitry on the right hand side, a little above center. Find T1, T2, some resistors, capacitors, diodes. You see the “FWD” and “REV” identifying tags? Those go to the inter-board multipin connectors, and then (on the Main Board schematic) to the AtMega processor pins 19 and 22.

The most likely problem is poor solder joints (no connection or solder shorts) at T1 or T2. This kind of problem is quite common! Less likely but possible are poor solder joints at the 1x14 multipin connectors. Much less likely is a poor solder joint at the AtMega processor since it was presumably installed at a PC board fabrication factory. Take a look at the resistors, capacitors and diodes as well. These were also installed at factory, but something could be broken.