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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+Re\:\s+Calibrating\s+LF\s+Current\s+Meters\s*$/: 5 ]

Total 5 documents matching your query.

1. Re: LF: Re: Calibrating LF Current Meters (score: 1)
Author: "Alexander S. Yurkov" <[email protected]>
Date: Fri, 15 Nov 2002 19:21:14 +0000 (GMT)
Hi, Group. 3. Put a suitable light bulb in series. Measure the brightness with a light meter, then see how much DC or mains frequency current it takes to produce the same brightness. More easy way: t
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-11/msg00167.html (10,567 bytes)

2. LF: Re: Calibrating LF Current Meters (score: 1)
Author: "Dave Pick" <[email protected]>
Date: Fri, 15 Nov 2002 14:50:58 +0100
Hugh. Quick and dirty way.... Fire up a 100W jap rig on 160 into a 50 ohm load. At full welly of 100W you should read 1.4A into the load. If the tx has a power meter or you have an external one in li
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-11/msg00172.html (10,725 bytes)

3. LF: Re: Calibrating LF Current Meters (score: 1)
Author: "Stewart Nelson" <[email protected]>
Date: Fri, 15 Nov 2002 12:41:23 +0100
Hi Hugh, You don't say what other instruments you have available, but here are a few suggestions: 1. Measure the RF voltage across the dummy load with a scope. Determine current by knowing or measuri
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-11/msg00174.html (11,816 bytes)

4. LF: Re: Calibrating LF Current Meters (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Fri, 15 Nov 2002 12:32:26 +0100
Hugh, How have other people done it ? Any ideas ? I built a 1A antenna current meter with a current transformer. For calibration, I put a 10 ohm resistor (actually 10 x 100 ohms 1W in parallel) in se
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-11/msg00175.html (11,051 bytes)

5. LF: Re: Calibrating LF Current Meters (score: 1)
Author: "Alan Melia" <[email protected]>
Date: Fri, 15 Nov 2002 12:45:06 +0100
Hi Hugh, two possible methods, one, put the power through the meter into a dummy lead, and measure the voltage generated across the load with a scope (easiest) or using an RF diode probe (but there i
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-11/msg00177.html (9,021 bytes)


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