[Amps] RE : Led display problem

[Carcia, Francis A HS]

Hall effect is an active current transformer device so it would be used to
measure current.
I think digi key sells them. It converts current to volts. The device fits
over an insulated wire for high voltage isolation. It will measure DC
current unlike a current transformer that only measures AC current. A simple
panel mounted DVM could be scaled to measure current and be isolated from
high voltage. gfz 

-----Original Message-----
From: hermans [mailto:on4kj at skynet.be]
Sent: Tuesday, April 19, 2005 4:09 PM
To: 'Carcia, Francis A HS'; 'Patrick EGLOFF'; amps at contesting.com
Subject: RE : [Amps] Led display problem


Hall effect!!.... would you make clear how you would proceed with a hall
effect Francis. 

Jos on4kj

De : amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] De
la part de Carcia, Francis A HS
Envoyé : mardi 19 avril 2005 14:31
À : 'Patrick EGLOFF'; amps at contesting.com
Objet : Re: [Amps] Led display problem

how about a hall effect sensor???

-----Original Message-----
From: Patrick EGLOFF [mailto:pegloff at gmail.com]
Sent: Monday, April 18, 2005 5:30 PM
To: amps at contesting.com
Subject: [Amps] Led display problem


Hi All,
I'm new on this list...

I'm planning to build a 2m amp with a 4CX1500B tetrode.
I want it a bit state of the art and replace the meters with LED bars.

My design will be a cathode driven, DC grounded amplifier and i want to 
monitor at least screen, grid and anode current and anode voltage.

The LM3914 input seems to be always referenced to ground. No problem to 
measure the screen current for which a pole of the supply is grounded.

But a bit more difficult to measure the other currents and voltages for 
which the reference et the cathode level.

Has anyone an idea how to do that, on a simple way ?

73, Patrick TK5EP.
http://tk5ep.free.fr
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