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Total 654 documents matching your query.

61. Re: [Amps] FW: RE: Liquid Cooling Systems (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Fri, 11 Mar 2005 11:39:09 -0500
Well, it sounds good but they left out a few things. It would seem that if the surface tension is less with this product that would make turbulent flow become less. With less turbulent flow there is
/archives//html/Amps/2005-03/msg00285.html (14,445 bytes)

62. [Amps] FL2100B power switch needed (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Fri, 11 Mar 2005 21:19:11 -0500
Working on an old FL2100B amp. I am in need of the off / on power switch. The standby switch looks to be the same. Handle is broken off. Anybody have one? Even a bad one with a good handle may be ok
/archives//html/Amps/2005-03/msg00305.html (6,669 bytes)

63. Re: [Amps] Bird Element Calibration? (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Mon, 21 Mar 2005 11:41:24 -0500
Guys, keep in mind that 5% accuracy spec is of FULL scale. That means that a 2500 watt slug has +- 125 watt accuracy at ANY part of the scale. If you read 1000 watts on the meter with the 2500 watt s
/archives//html/Amps/2005-03/msg00453.html (11,763 bytes)

64. Re: [Amps] Measuring RF Power (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Mon, 21 Mar 2005 12:08:22 -0500
It may also be worth mentioning that there really is no such thing as "RMS power". The proper term is average power. RMS is only valid in terms of voltage or current. You can find an RMS value of pow
/archives//html/Amps/2005-03/msg00456.html (8,027 bytes)

65. Re: [Amps] Measuring RF Power (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Mon, 21 Mar 2005 13:06:21 -0500
Only average power is useful. 73 Gary K4FMX _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2005-03/msg00467.html (8,706 bytes)

66. Re: [Amps] Bird Element Calibration? (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Tue, 22 Mar 2005 10:02:12 -0500
To some it is like a religion. To even think of questioning it you will be accused of blasphemy. 73 Gary K4FMX _______________________________________________ Amps mailing list Amps@contesting.com ht
/archives//html/Amps/2005-03/msg00482.html (10,501 bytes)

67. Re: [Amps] Measuring RF Power (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Tue, 22 Mar 2005 11:16:57 -0500
That's a common misconception. Only RMS voltage or RMS current through a resistor produces the equivalent heating that the same value DC voltage or current provide into that same resistor. When calcu
/archives//html/Amps/2005-03/msg00485.html (10,683 bytes)

68. Re: [Amps] Measuring RF Power (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Tue, 22 Mar 2005 14:18:23 -0500
1. How much peak power do you get when you have 10 volts peak across a 50 ohm resistor? @ 2 watts. 2. What is the average power across that resistor? @ 1 watt. (average power = 1/2 peak power) 3. If
/archives//html/Amps/2005-03/msg00493.html (12,581 bytes)

69. Re: [Amps] Bird Element Calibration? (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Tue, 22 Mar 2005 14:22:41 -0500
Only by the unknowing. 73 Gary K4FMX _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2005-03/msg00494.html (9,688 bytes)

70. Re: [Amps] Measuring RF Power (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Tue, 22 Mar 2005 15:25:09 -0500
If what you say was true then there would never be any power into our transmission lines. Average power is not zero simply because there is no negative power. There is only RMS voltage and RMS curren
/archives//html/Amps/2005-03/msg00498.html (9,381 bytes)

71. Re: [Amps] Measuring RF Power (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Tue, 22 Mar 2005 16:04:27 -0500
The RMS value of a power wave form is not the same as finding the RMS voltage value, squaring it and dividing by resistance. 73 Gary K4FMX _______________________________________________ Amps mailing
/archives//html/Amps/2005-03/msg00500.html (10,061 bytes)

72. Re: [Amps] Measuring RF Power (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Tue, 22 Mar 2005 16:30:31 -0500
No fault found with why average is not zero. This is the part I was responding to: I guess you meant instantaneous VOLTAGE rather than power? Otherwise you would be finding the RMS value of power. 73
/archives//html/Amps/2005-03/msg00503.html (9,438 bytes)

73. Re: [Amps] Measuring RF Power (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Tue, 22 Mar 2005 17:37:36 -0500
As an additional note it is interesting that 120 volts DC on that same light bulb gives the same 100 watt power as the average AC power. The statement that you often see, "RMS has the same heating ef
/archives//html/Amps/2005-03/msg00507.html (11,287 bytes)

74. Re: [Amps] Measuring RF Power (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Tue, 22 Mar 2005 17:53:21 -0500
When adding PEP to the mix it is vital that average power be understood properly. Best to put RMS power out of mind as it is good for nothing but confusion. Reading the FCC definition of PEP it goes
/archives//html/Amps/2005-03/msg00508.html (8,668 bytes)

75. Re: [Amps] Measuring RF Power (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Wed, 23 Mar 2005 12:48:45 -0500
The water heater gets hot with 7200 watts average power. 73 Gary K4FMX _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listin
/archives//html/Amps/2005-03/msg00527.html (10,162 bytes)

76. Re: [Amps] Measuring RF Power (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Wed, 23 Mar 2005 12:52:29 -0500
If it were 1500 watts average power cw signal it would produce 1500 watts heat in the R. I don't know what you would do with 1500 watts RMS. 73 Gary K4FMX ____________________________________________
/archives//html/Amps/2005-03/msg00528.html (9,305 bytes)

77. Re: [Amps] Measuring RF Power (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Wed, 23 Mar 2005 13:31:06 -0500
A sine wave is considered in all of the above calculations. A sine wave is considered in all of the above calculations. Yes it is AVERAGE power. Look at the FCC's definition of peak envelope power. I
/archives//html/Amps/2005-03/msg00531.html (11,644 bytes)

78. Re: [Amps] Measuring RF Power (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Wed, 23 Mar 2005 13:35:12 -0500
And that would give you average power to calibrate your watt meter at. 73 Gary K4FMX _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/
/archives//html/Amps/2005-03/msg00532.html (10,621 bytes)

79. Re: [Amps] 4CX1000A for SSB?? (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Wed, 23 Mar 2005 13:47:02 -0500
But what does it tell you? 73 Gary K4FMX _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2005-03/msg00533.html (11,035 bytes)

80. Re: [Amps] Bird Element Calibration? (score: 1)
Author: Gary Schafer <garyschafer@comcast.net>
Date: Thu, 24 Mar 2005 08:58:27 -0500
A 5% error in measuring voltage means a 10% error when calculating power. 73 Gary K4FMX _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.c
/archives//html/Amps/2005-03/msg00541.html (9,109 bytes)

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