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KPA1500 Temperature Management
#kpa1500
For what it's worth, I run my KPA1500 "stock" (no fan modifications or management). On some of the 6 meter openings this summer, I'd be transmitting 15 on /15 off for over an hour straight. At full bo
For what it's worth, I run my KPA1500 "stock" (no fan modifications or management). On some of the 6 meter openings this summer, I'd be transmitting 15 on /15 off for over an hour straight. At full bo
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Scott Townley
· #35728
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KPA1500 Temperature Management
#kpa1500
Thanks all for your suggestions and replies. I am more comfortable now accepting Elecraft’s technology to protect the amp from over heating. One change here, I relocated the amp to provide much better
Thanks all for your suggestions and replies. I am more comfortable now accepting Elecraft’s technology to protect the amp from over heating. One change here, I relocated the amp to provide much better
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David Mackey
· #35727
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KPA1500 Temperature Management
#kpa1500
Making a couple of observations. 1. I run the KPA 1500 at about a KW on lower bands and full power on higher bands. I am a long winded CW operator so generally get to fan level three during most trans
Making a couple of observations. 1. I run the KPA 1500 at about a KW on lower bands and full power on higher bands. I am a long winded CW operator so generally get to fan level three during most trans
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By
wb6bee
· #35709
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KPA1500 Temperature Management
#kpa1500
I can only speak for my little KPA500, but the first few weeks I had it, the temps would rise to about 59C on digital and the unit would make small thermal contraction noises at the end of tx. However
I can only speak for my little KPA500, but the first few weeks I had it, the temps would rise to about 59C on digital and the unit would make small thermal contraction noises at the end of tx. However
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Steve Fox
· #35706
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KPA1500 Temperature Management
#kpa1500
In CW contest operation, I've never see the temperature get much above 60 C. I have, however, tested the fans at maximum speed. You will know if they ever reach that speed, and there better not be any
In CW contest operation, I've never see the temperature get much above 60 C. I have, however, tested the fans at maximum speed. You will know if they ever reach that speed, and there better not be any
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By
K9MA
· #35705
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KPA1500 Temperature Management
#kpa1500
K6XX, a neighbor and good friend, is the engineer for Elecraft tasked with putting both of Elecraft's amps into production. We are both contesters, and I do a lot of WSJT modes on 6M and 160M. Bob adv
K6XX, a neighbor and good friend, is the engineer for Elecraft tasked with putting both of Elecraft's amps into production. We are both contesters, and I do a lot of WSJT modes on 6M and 160M. Bob adv
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Jim Brown
· #35704
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KPA1500 Temperature Management
#kpa1500
I just added a KPA1500 to the shack, and I am unsure about how much I should worry about temperature management. I know the maximum specified in the specs is 110C, but that does seem very high. The fa
I just added a KPA1500 to the shack, and I am unsure about how much I should worry about temperature management. I know the maximum specified in the specs is 110C, but that does seem very high. The fa
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David Mackey
· #35702
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K3s driving a KPA1500 - how much drive power is nominal for 1500 watts?
#kpa1500
Re dummy load. First measure it with an ohm meter. It should measure 50 ohms +/- 5% or better. Then measure it with your antenna bridge from the lowest to highest frequency you intend to use. An MFJ-2
Re dummy load. First measure it with an ohm meter. It should measure 50 ohms +/- 5% or better. Then measure it with your antenna bridge from the lowest to highest frequency you intend to use. An MFJ-2
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Bob McGraw - K4TAX
· #32059
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K3s driving a KPA1500 - how much drive power is nominal for 1500 watts?
#kpa1500
I have only received my KPA1500 recently, But I decided to put it through the paces with the K3S being the exciter. I found that into a Cantenna Dummy Load that has not been tested for 50 Ohm impedanc
I have only received my KPA1500 recently, But I decided to put it through the paces with the K3S being the exciter. I found that into a Cantenna Dummy Load that has not been tested for 50 Ohm impedanc
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Mike VE3YF
· #32058
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K3s driving a KPA1500 - how much drive power is nominal for 1500 watts?
#kpa1500
That display should be indicating OUTPUT power. I suggest you use an external meter of known accuracy and a 50 ohm dummy load of known accuracy. Measure both the input to the amp from the transceiver
That display should be indicating OUTPUT power. I suggest you use an external meter of known accuracy and a 50 ohm dummy load of known accuracy. Measure both the input to the amp from the transceiver
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Bob McGraw - K4TAX
· #32044
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K3s driving a KPA1500 - how much drive power is nominal for 1500 watts?
#kpa1500
Adrian, I mean 1500W as indicated on the led power bar whatever that means - input / output. 73, Jim K7EG
Adrian, I mean 1500W as indicated on the led power bar whatever that means - input / output. 73, Jim K7EG
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By
Jim Denneny
· #32043
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K3s driving a KPA1500 - how much drive power is nominal for 1500 watts?
#kpa1500
FCC max gain for amps is 15 dB. Ray W8LYJ
FCC max gain for amps is 15 dB. Ray W8LYJ
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Ray
· #32042
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K3s driving a KPA1500 - how much drive power is nominal for 1500 watts?
#kpa1500
I think that was a typo - I'm sure he meant 1500 watts out.
I think that was a typo - I'm sure he meant 1500 watts out.
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By
...
· #32039
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K3s driving a KPA1500 - how much drive power is nominal for 1500 watts?
#kpa1500
Jim, Can you clarify what you mean by 1500 watts input ? I thought that 1500 watts was the output figure on the amp with that drive, and that the input value would be much higher allowing for efficien
Jim, Can you clarify what you mean by 1500 watts input ? I thought that 1500 watts was the output figure on the amp with that drive, and that the input value would be much higher allowing for efficien
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...
· #32038
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K3s driving a KPA1500 - how much drive power is nominal for 1500 watts?
#kpa1500
About 25 - 30 watts for 1500 watts input. Jim K7EG
About 25 - 30 watts for 1500 watts input. Jim K7EG
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By
Jim Denneny
· #32037
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K3s driving a KPA1500 - how much drive power is nominal for 1500 watts?
#kpa1500
Sounds friggin' awesome! ______________________ Clay Autery, KY5G (318) 518-1389 On 02/02/20 08:53, John Canfield wrote:
Sounds friggin' awesome! ______________________ Clay Autery, KY5G (318) 518-1389 On 02/02/20 08:53, John Canfield wrote:
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Clay Autery
· #32035
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K3s driving a KPA1500 - how much drive power is nominal for 1500 watts?
#kpa1500
Good. 35 watts of drive from my K3 drives my Alpha 8410 to legal limit power. Chris NU1O
Good. 35 watts of drive from my K3 drives my Alpha 8410 to legal limit power. Chris NU1O
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By
Christopher Scibelli
· #32034
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K3s driving a KPA1500 - how much drive power is nominal for 1500 watts?
#kpa1500
Thanks again guys and thanks Bob for the numbers. I wasn't making notes when tracking drive vs. output power - just a fairly gross report of what I was seeing. The entire reason for my question is my
Thanks again guys and thanks Bob for the numbers. I wasn't making notes when tracking drive vs. output power - just a fairly gross report of what I was seeing. The entire reason for my question is my
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...
· #32033
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K3s driving a KPA1500 - how much drive power is nominal for 1500 watts?
#kpa1500
In doing the math, 28 watts to 1500 watts is 17.3 dB gain, while 5 watts to 150 watts is 14.8 dB gain, and 5 watts to 200 watts is 16.0 dB gain. The point is the amp appears to be operating normally w
In doing the math, 28 watts to 1500 watts is 17.3 dB gain, while 5 watts to 150 watts is 14.8 dB gain, and 5 watts to 200 watts is 16.0 dB gain. The point is the amp appears to be operating normally w
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Bob McGraw - K4TAX
· #32032
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K3s driving a KPA1500 - how much drive power is nominal for 1500 watts?
#kpa1500
Yes the K3 is cleanest around 35 watts. No I never tested it at 30 watts vs. 35 watts, etc. I doubt you could tell the difference. Rob, NC0B
Yes the K3 is cleanest around 35 watts. No I never tested it at 30 watts vs. 35 watts, etc. I doubt you could tell the difference. Rob, NC0B
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Rob Sherwood
· #32031
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