If you are using a 0-1ma FS meter it is typically 1000 ohms per volt. This
means that if you wanted a 2500V FS reading you would need 2500 * 1000 =
2,500,000 ohm in the meter multiplier string. I would think that you want a
FS higher than 2500V, like 5000V, which would mean that you need 5,000,000
ohms or 5 meg ohms in the meter multiplier string. Then you need something
to lift it slightly above ground, like 10K ohms.
Bob W6TR
----- Original Message -----
From: "KB0NLY" <kb0nly@mchsi.com>
To: <amps@contesting.com>
Sent: Sunday, March 01, 2009 7:47 PM
Subject: [Amps] HV Divider
I'm using GM3SEK's Triode Board for my 6m amp project using the GI-7B, i ran
into a problem today with the power supply. According to his manual, i sent
him an email as well waiting for a reply, for 2500v i should use 10 1M Ohm
resistors in series from the B+ line, on the end of that string of resistors
there is also two 100k 1W resistors to chassis ground. My supply is 2400V,
measured with a HV meter i get 2380V.
The problem is the output of that divider is supposed to be 12v or less. I
put the positive of my meter on the end of the chain of resistors and i put
the negative to chassis, 0V, nothing nada. Then i put the negative to the
0V lug on the secondary of the transformer and i get 113V.
How is this supposed to work that i can get 12v from it?????
73,
Scott KBØNLY
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