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Use with FT 8
开云体育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.
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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.
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Ron - WA2EIO
General consensus is to only run a few hundred watts on FT-8:
/g/la1k/search?p=Created%2C%2Cft8+tranmit+power%2C20%2C2%2C0%2C0&q=ft8+power Ron?? WA2EIO |
开云体育I'm not aware of any problems with FT8. Best Regards, and 73 On 5/2/2023 6:28 PM, Olen Persons via
groups.io wrote:
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开云体育Gents Today I started using my LA1K and HF Auto Tuner with my IC 7300 running FT 8. I noticed the amp running around 50c after a while so I put it in stand by for a while and resumed operation. Does anyone know if the LA1K has any problems with FT 8 operation? ? W4EZR Olen Persons ? ? From: [email protected] <[email protected]> On Behalf Of Michael Kelly
Sent: Tuesday, May 2, 2023 4:50 PM To: [email protected] Subject: Re: [la1k] POWER SWITCH FAILURE ? Mine is 2yrs old purchased direct from pal star, never a glitch.? I drive it with 40 watts from a ten tec omni7 and get 800 to 1k out.? Ant is a zero 5 40 meter vert fed with 213 coax. Swr is pretty flat across 40 and 15 meters. Great amp ? On Tue, May 2, 2023 at 4:29 PM tuneupmagic (null) via <tuneupmagic=[email protected]> wrote:
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