What do I know?
- I have had to replace BS170's in QDX and QMX four times before adding Zeners..
- I was using an auto tuner before I realized they have big SWR spikes - possible cause of failure
- I also found an intermittent in a coax cable? - possible cause of failure
- No failures since I put the Zeners in - not proof they work, could be coincidence
- Even a fast voltage breakdown of BS170 will probably cause permanent damage.
I am concerned that the Zener's capacitance may be detrimental during 6m operation.? I have been unable to find the Zener's capacitance, I may just see how the QMX+ works with and without Zeners
It would be good to hear Hans' views.
