Grid leak resistor wattage

[Neil Morrison]

IIRC, we're talking microamps. Think of a VTVM, which is basically a
similar tube with a 10 Mohm resistor. To get 1 mA through a 10 Mohm
resistor would need about 10,000 volts!

Neil


----- Original Message -----
From: "Brian Wood" <brianmwood at DIRECWAY.COM>


> How much current comes out of a 12AX7's control grid? Everyone's
said to
> replace the grid leak resistor on the DX-100's audio input stage
with a 10M
> resistor to better match my D-104. But the current better be darn
close to
> zero or I'm gonna need a big wattage resistor! Even 1 mA would
require a 10W
> resistor. It's a 1/2W 470K now. I happen to have a 1/4W or maybe
it's an
> 1/8W 10M resistor. Help!
>
> Brian, W0DZ

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