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kW-class amp : where goes the power ?
Hi,
I would like to buy a desk kW-class amplifier (tube or solid-state) but before I try to get as much information I can about advantages and drawbacks of each model (I have 12 tubes amps to compare while solid-states are not numerous between Icom - too expensive -, Yaesu and Tokyo Hy-Power). I learnt for example that Yaesu VL-1000 Quadra displays a RF ouput of about 1kW PEP, in line with its specs On the contrary the Tokyo Hy-Power HL-1KFX, 1.2 kW PEP provides less than 600W peak output (250W in RTTY or AM), even using an antenna tuner to get a VSWR 1:1 on the working band. So we cannot really say that the lost power (in this case 600W) is lost as heat as my SWR on the line is well 1:1. Can someone explain me where goes the lost power in the Tokyo model or if my reflexion is faulty? Thanks in advance Thierry ON4SKY QSL Mgr for LX3SKY http://www.astrosurf.com/lombry |
Hi,
I learnt for example that Yaesu VL-1000 Quadra displays a RF ouput of about 1kW PEP, in line with its specs On the contrary the Tokyo Hy-Power HL-1KFX, 1.2 kW PEP provides less than 600W peak output (250W in RTTY or AM), even using an antenna tuner to get a VSWR 1:1 on the working band. So we cannot really say that the lost power (in this case 600W) is lost as heat as my SWR on the line is well 1:1. Can someone explain me where goes the lost power in the Tokyo model or if my reflexion is faulty? It is all about how you read the specifications. The VL-1000 has 1.0kW output for 2.1kW DC input The HL-1KFX has 0.6kW output for 1.2KW DC input. 73 de Joe, G3LLV |
Hi,
I learnt for example that Yaesu VL-1000 Quadra displays a RF ouput of about 1kW PEP, in line with its specs On the contrary the Tokyo Hy-Power HL-1KFX, 1.2 kW PEP provides less than 600W peak output (250W in RTTY or AM), even using an antenna tuner to get a VSWR 1:1 on the working band. So we cannot really say that the lost power (in this case 600W) is lost as heat as my SWR on the line is well 1:1. Can someone explain me where goes the lost power in the Tokyo model or if my reflexion is faulty? It is all about how you read the specifications. The VL-1000 has 1.0kW output for 2.1kW DC input The HL-1KFX has 0.6kW output for 1.2KW DC input. 73 de Joe, G3LLV |
The radio equivalent of "serving size" calories, eh? grin
Can anyone tell me (out of curiosity) how much does the Tokyo Hy_power HL-1KFX cost? Paul "Joe McElvenney" wrote in message ... Hi, I learnt for example that Yaesu VL-1000 Quadra displays a RF ouput of about 1kW PEP, in line with its specs On the contrary the Tokyo Hy-Power HL-1KFX, 1.2 kW PEP provides less than 600W peak output (250W in RTTY or AM), even using an antenna tuner to get a VSWR 1:1 on the working band. So we cannot really say that the lost power (in this case 600W) is lost as heat as my SWR on the line is well 1:1. Can someone explain me where goes the lost power in the Tokyo model or if my reflexion is faulty? It is all about how you read the specifications. The VL-1000 has 1.0kW output for 2.1kW DC input The HL-1KFX has 0.6kW output for 1.2KW DC input. 73 de Joe, G3LLV |
The radio equivalent of "serving size" calories, eh? grin
Can anyone tell me (out of curiosity) how much does the Tokyo Hy_power HL-1KFX cost? Paul "Joe McElvenney" wrote in message ... Hi, I learnt for example that Yaesu VL-1000 Quadra displays a RF ouput of about 1kW PEP, in line with its specs On the contrary the Tokyo Hy-Power HL-1KFX, 1.2 kW PEP provides less than 600W peak output (250W in RTTY or AM), even using an antenna tuner to get a VSWR 1:1 on the working band. So we cannot really say that the lost power (in this case 600W) is lost as heat as my SWR on the line is well 1:1. Can someone explain me where goes the lost power in the Tokyo model or if my reflexion is faulty? It is all about how you read the specifications. The VL-1000 has 1.0kW output for 2.1kW DC input The HL-1KFX has 0.6kW output for 1.2KW DC input. 73 de Joe, G3LLV |
"Joe McElvenney" wrote in message ... Hi, I learnt for example that Yaesu VL-1000 Quadra displays a RF ouput of about 1kW PEP, in line with its specs On the contrary the Tokyo Hy-Power HL-1KFX, 1.2 kW PEP provides less than 600W peak output (250W in RTTY or AM), even using an antenna tuner to get a VSWR 1:1 on the working band. So we cannot really say that the lost power (in this case 600W) is lost as heat as my SWR on the line is well 1:1. Can someone explain me where goes the lost power in the Tokyo model or if my reflexion is faulty? It is all about how you read the specifications. The VL-1000 has 1.0kW output for 2.1kW DC input The HL-1KFX has 0.6kW output for 1.2KW DC input. You right. I misread specs... Thierry 73 de Joe, G3LLV |
"Joe McElvenney" wrote in message ... Hi, I learnt for example that Yaesu VL-1000 Quadra displays a RF ouput of about 1kW PEP, in line with its specs On the contrary the Tokyo Hy-Power HL-1KFX, 1.2 kW PEP provides less than 600W peak output (250W in RTTY or AM), even using an antenna tuner to get a VSWR 1:1 on the working band. So we cannot really say that the lost power (in this case 600W) is lost as heat as my SWR on the line is well 1:1. Can someone explain me where goes the lost power in the Tokyo model or if my reflexion is faulty? It is all about how you read the specifications. The VL-1000 has 1.0kW output for 2.1kW DC input The HL-1KFX has 0.6kW output for 1.2KW DC input. You right. I misread specs... Thierry 73 de Joe, G3LLV |
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