[ARC5] Voltage Sequencing on 807s

[jmfranke]

The divider is safer. Otherwise, you may apply power to the screen with no 
voltage to the plate. Under the right circumstances, the screen will then 
draw too much current and the screen could melt. Plate voltage without 
screen voltage is safer.

John  WA4WDL

--------------------------------------------------
From: "J. Forster" <jfor at quikus.com>
Sent: Friday, October 18, 2013 6:21 PM
To: <ARC5 at mailman.QTH.net>; <boatanchors at mailman.QTH.net>; 
<boatanchors at puck.nether.net>
Cc: <ArmyRadios at yahoogroups.com>; <Milsurplus at mailman.QTH.net>
Subject: [ARC5] Voltage Sequencing on 807s

> I'm looking at testing some 807s, which seems pretty straight forward.
> And, no, I don't have a tube tester available.
>
> Obviously, the heater and control grid get powered first, but what about
> the screen and plate? Or does it even make any significant difference?
>
> My original intention was to use a (decoupled) divider off B+ for the
> screen, but at the moment, I'm inclined to use a separate supply.
>
> -John
>
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