18MHz drain Voltage supply Bypass problem
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I started using my 2022 LA-1K this week in earnest. I was checking the power on each band as well as some CQs on CW or answering?some SSB CQs. Testing bands 40m to 10m I found a problem on 17m (18MHz)
Running the IC-7300 with just 30-50W into the amp, I saw 900 to 1050W on all bands except 17m.
There it goes into bypass, even dropping power to 15W in 300W out I get the?+Vd bypass.? Going down to 10W in 200W lets it keep working..
I made a 4 min video and a couple of pictures in case Palstar needs to see this. Is there an internal adjustment I can do or some testing I can do inside to avoid the shipping to and from Palstar? The book only has this text below Bypass+VD: [as seen on display]
Amp is in BYPASS to protect from loss of +50V, drain
voltage supply. The indication should clear in a few
seconds. This occurs when operating on 120V, if Drain
Current (Id) exceeds 32 Amps .
Solution:
Switch supply voltage to 240V, or If operating on 120V,
Reduce Drive Power
Any?help, appreciated!
BTW I'm using the HF-Auto tuner as well. The antenna is at 1.8:1 and the tuner gets to 1.05:1 easy.
73 Raul? ?W4AWI
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