Re: SWR High SSB ONLY - When Using LA-1K Amp
My IC-7300 kept overdriving the LA-1K even with relatively low drive (30
watts), no matter what I did. Later, I heard the 7300's are prone to run
hot and my 7300 seemed to be one certainly did. But,
By
Joe Loverti WW8X
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#1059
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Re: SWR High SSB ONLY - When Using LA-1K Amp
I have two LA-1K amps and two HF-AUTO tuners.
One pair is connected to my Flex6400 and the other pair is connected to my IC-7610
The pair connected to my Flex6400, I have no problems, full 1200 watts
By
Thomas NE7X
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#1058
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Re: Digital modes and fast temperature rise
Hi, I blew one of the final transisters. :) Oops, lol
Scott
Sent: Wednesday, February 1, 2023 11:51 AM
To: [email protected]
Subject: Re: [la1k] Digital modes and fast temperature rise
By
Scott Sherer <ssherer@...>
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#1057
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Re: Digital modes and fast temperature rise
Scott,
I used to have the problem of my amp going into bypass on digital modes all the time. Made it totally useless. However I changed the way I set up my radio and now the problem seems to be gone.
By
Al - KD2PNR
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#1056
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Re: Digital modes and fast temperature rise
Scott,
Out of curiosity, what was the symptom or problem from the over-drive??
Was there an error that pointed you in the direction to say it won't
operate until it is fixed??? Or did it just not
By
David Campeau
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#1055
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Re: Digital modes and fast temperature rise
Hi Fred,
My environment includes a Yaesu FTDX-101MP that I use with FT8 (the only mode I do). I have an HF-Auto tuner and a 43ft vertical with dozens of radials. I drive the amp with from 9 to 16
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Scott Sherer <ssherer@...>
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#1054
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Re: Digital modes and fast temperature rise
With the duty cycle of digital, I treat it as AM and run at about 125W
output.
I don't run FT8 that constantly runs, but I run keyboard chat modes and in
long rag chews that can run an hour+.
Like
By
Chris E.
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#1053
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Re: Digital modes and fast temperature rise
Scott - Don't recall ever meeting you, but we are not far apart.
My LA-1K went back for warranty service two years ago.? While there it was upgraded with quieter T/R relay and fans (at a reasonable
By
Fred, W9KEY
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#1052
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Re: Digital modes and fast temperature rise
Cooling issues: high level gamers use liquid cooled processors and innovative heatsinks. Ham radio is all about innovation, so maybe you digital guys might take a page from their book and make some
By
David Hussey <N7BQV@...>
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#1051
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Re: Digital modes and fast temperature rise
There's really no reason to be disappointed because the AMP really holds
its value well if you wanted to sell it. The really good news is the AMP
market is fairly saturated meaning there are a lot of
By
David Campeau
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#1050
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Re: Digital modes and fast temperature rise
Interesting observations all around. I run on 240, so there is no improvement to be gained there. As my temps rise the fans shift through the 3 levels, with the last one being very loud indeed. This
By
Al - KD2PNR
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#1049
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Re: Digital modes and fast temperature rise
Hi all,
Regarding heat and my la1k: I push about 350 watts using ft8 and the temp in my amp (regardless of band) climbs to 64 degrees C. I have the amp sitting in a plenum with four
By
Scott Sherer <ssherer@...>
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#1048
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Re: Digital modes and fast temperature rise
Al,
Is the amp suckling on 120V or 240V??? I'm still on 120V, but from what
I understand, the amp will run hotter, hence fans will run more.? My
Elmer also has the LA-1K, but on 240V, and we have
By
David Campeau
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#1047
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Re: Digital modes and fast temperature rise
Certain bands show the same quick rise in temperature, some other bands rise slower, but I pretty much have to stop operating digital modes after about 10 to 15 minutes.
2 QSOs on 40M are enough
By
Bernd - KB7AK
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#1046
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Re: Digital modes and fast temperature rise
I actually have a small fan sitting next to the amp which I have found
helps the quick temperature rise.
[email protected]> wrote:
By
Terry Hursh <revhursh@...>
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#1045
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Digital modes and fast temperature rise
I have had my la-1k for a few years now, and it has never gotten hot in SSB use (usually <500 W). I have recently found out how to solve a problem I had with it constantly going into SWR bypass in a
By
Al - KD2PNR
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#1044
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Re: Display is blank
When I was using my LA-1K I never had a blank display. ?Art W1SWL
By
W1SWL
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#1043
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Re: Display is blank
Same, my amp has never exhibited this behavior, but like Thomas, never used a data cable (la-1k is RF sensing so not required). However, I just assembled a data cable for the FTDX10, and will report
By
David Campeau
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#1042
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Re: Display is blank
This is the first time I've read about this issue. I have 2 LA-1K's and
have not experienced this issue with either. I use the band data cable to
connect to my 101MP and SteppIR controller. I
By
Fred Kepner
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#1041
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Re: Display is blank
Very interesting my amp never does that no matter what series of on and off the radio or the amp or switching to my second amp
By
THOMAS ARCORACI
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#1040
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