[Re: Grid leak resistor wattage]

[Noel Page]

  When sizing  resistors, one has to take into account the maximum
circuit voltage.
Typical ratings for Carbon Film resistors are:

1/8w - 200v.
1/4w - 250v.
1/2w - 350v.
1w - 500v.
2w - 500v.

Noel Page

-------- Original Message --------
Subject: Grid leak resistor wattage
Date: Tue, 12 Nov 2002 19:03:52 -0700
From: Brian Wood <brianmwood at DIRECWAY.COM>
Reply-To: Brian Wood <brianmwood at DIRECWAY.COM>
To: HEATH at LISTSERV.TEMPE.GOV



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

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.asp?list=HEATH
To post - HEATH at LISTSERV.TEMPE.GOV
Archives - http://in

teractive.tempe.gov/archives/HEATH.html

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.asp?list=HEATH
To post - HEATH at LISTSERV.TEMPE.GOV
Archives - http://interactive.tempe.gov/archives/HEATH.html