amps-request@contesting.com skrev:
Ian,
Thanks for pointing out that the potential is still *below* chassis ground. Of
course it is!
Also, you triode board looks very interesting. I have some reading to do here!
73's
/Ulf
Date: Wed, 8 Apr 2009 17:40:14 +0100
From: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Subject: Re: [Amps] HV supply question
To: amps@contesting.com
Message-ID: <DToSW8GuNN3JFAmB@ifwtech.co.uk>
Content-Type: text/plain;charset=us-ascii;format=flowed
Ulf Tjerneld wrote:
> >
> >I have noticed when I look on different HV supplys that sometimes the
> >negative lead is connected to chassis ground and sometimes it is kept
> >at a potential somewhat above ground by means of a resistor. Can anyone
> >explain to me why, and if, this is important?
> >
>
The HV-minus lead (American: B-minus) is often allowed to go a little
*below* chassis ground potential to permit safe metering of the anode
current. In a triode amplifier, the grid current can also be measured
separately.
For more details and diagrams of the current flows, you're welcome to
download the Triode Board manual from the link below.
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