You need to connect the back panel BNC, labeled OUT
through a power meter to a dummy load.
This is the 10 watt amp out. OUT is 10 watt amp output.
IN is the 100 watt amp IN to the BPF.
If you get them backwards you will see what you describe.
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hello everyone, I’m rescuing a ft-301ad from the scrap yard. The
issue I’m currently wrestling with is that the protection circuit
is always engaged, preventing transmission. I have the linear amp
removed from the rear and the 2 BNC connectors jumpered and the
radio connected to a dummy load. When the radio is powered on, the
light is already blinking. I don’t see any obvious damage inside
the rig and was hoping this might be something people have had
trouble with before. The pb-1445 described in the manual available
online appears to be slightly different than mine, but I did try
adjusting the 2 adjustable pots on the board that are similar to
those mentioned in the manual for adjusting the protection
circuit. No change was observed.?
Anyway, hopefully someone can point me in the right direction!
KI7WQH
