Thanks all. I think I will keep running 100 150 watch and watch the temperature to let it government length of transmission. As long as the temperature does not get above 50 C, I don’t think it will be a problem as that is similar to what sideband does. I am surprised that digital output only gives me a couple hundred watch that Sideband with the same input would give me five or 600 and watts ?it’s still a little bit strange. Thanks if anybody has any other information about FT8 please share it. Thanks to all have a great day W4EZR. ?
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On May 3, 2023, at 9:56 AM, tuneupmagic (null) via groups.io <tuneupmagic@...> wrote:
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What error messages popped up on the LA-1K when it kicked out?
My experience doing SSB voice is that the amp’s protection schemes could be unnecessarily set on the conservative side.
73,
Ray
KJ5MI?
On May 3, 2023, at 8:56 AM, Al - KD2PNR via groups.io <ahw609@...> wrote:
?I can't speak directly about FT-8, but I have tried to use my amp on other digital modes (using fldigi), and have experience a couple of different issues. For a long time it would keep kicking out into BYPASS for some unknown reason. The antenna is resonant, and I tried it straight, as well as through my HF-AUTO, and the same behaviour. Ultimately I discovered that if I set up the levels differently in the transceiver it would stop kicking out. I am only looking for about 100 watts, so I only drive it with 5W. Now that it has stopped that behaviour I can use it, but the temperature climbs like a rocket! Keep in mind that many of the other modes require longer continuous transmissions, and so after about a minute it is up over 50, and a 2 minute transmission puts it in the red (over 70). In the end I think this amp is not really suited to any digital work, and I now just go direct at 25W. Given I got this amp for some SSB use, and decidedly being able to run 100-200W in digital modes, I am disappointed. My expectation was that trying to run a 1KW amp at 100W would not be any strain on the amp at all. Good luck with FT-8, maybe with it's shorter transmission times it will work for you.
