I'm building a QMX+ and will get to that stage in a day or two but I really doubt that the PCB wiring is incorrect.? I checked some of the connections round T507 and it seems fine.
I've always considered that the wiring instructions for T507 to be totally clear - wind the two transformers one on each side of the binocular core and connect using the holes that seem obvious but people do seem to have the ability to misinterpret this.
?
T507 is wired as two separate 10:1 transformers, one through the upper hole of the binocular core, the other through the lower hole.
Holding the board with the RF output in the lower right corner the T507 connections are two vertical rows of 4 holes just to the left of the RF BNC:
- The top pair of holes are used for the ends of the upper 10 turns of the upper transformer.
- The upper centre pair of holes are used for the 1 turn wire for the upper transformer, this comes straight from the upper centre left hole to the upper centre right hole, through the upper hole of T507.
- The lower centre pair of holes are used for the 1 'turn' wire for the lower transformer, this comes straight from the lower centre left hole to the lower centre right hole, through the lower hole of T507.
- The bottom pair of holes are used for the ends of the lower 10 turns of the lower transformer.
?
Hope that helps, if you have a problem then photos showing exactly what you have done will be useful.
?
Chris, G5CTH
