Topband: 4 sq receive and high power

[Ignacy Misztal]

I was planning to buy a 4 sq receive system for the upcoming CQ160 contest.
One question is about handling of high power when the 4sq cannot be put far
away from the tx antenna. HI-Z claims that their system is immune to high
power. DX Engineering claims the opposite and requires a sequencer. The
sequencer adds complexity and cost.

Did anyone experience a damaged amp in those systems? Would clamping the
input of a vertical with 2 back to back diodes be acceptable?

On a different note, the Hi-Z site states new legal problems and no sales.
There 4 sq was about $770 with new amps. However, DX Enginnering has an
"electrical only" option to HI-Z for $799 that appears equivalent to Hi-Z.
However it is sold out. So neither is available. Not sure there is another
viable option.

Ignacy, NO9E