Re: 100 watt PA issue
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According to the schematic I have, L23 is part of the 20/30 meter output LPF. If it's been overheated I suspect a mismatched load was encountered at some time. Does your problem occur only 30 and/or 20 meters? If so, I think you have your answer.
On Sunday, May 3, 2020, 4:37:40 PM MST, Jeffrey griffin <kb2mjeff@...> wrote:
Well I was asking anyone if they had a clue about L23, I guess not :-)
I will call Elecraft tomorrow…
73 Jeff kb2m
From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> On Behalf Of Wes Stewart via groups.io
And the IMD will be awful.
On Sunday, May 3, 2020, 2:59:43 PM MST, john ni0k <jasimmons@...> wrote:
Running 12 watts on data modes is bad. The low power PA won't withstand that.
Last summer I was running more data modes (FT8) when I started having an issue with the 100 watt PA failing with a ERR 12V message. I then did the KP3A power connector replacement. This worked fine for a few months. It was working fine till I once again noticed a strong burnt electronics smell coming from the K3's PA. I at that time just used it at 12 watts to Drive the KPA500 for a while as this worked fine. Today I decided to take it apart and try to determine what the issue is. After removing the KP3A module I noticed that L23 on the main board is severely heat damaged. I wasn't expecting this, I was looking to inspect the power connector that I had fixed with the gold pins 6 months ago. Anyone have any thoughts on why L23 would fail? Before I send it to Elecraft. Thanks...73 Jeff kb2m