For accuracy I definitely would use some 1% to 5% resistors in a separate
multiplier string. Use considerably higher values in the multiplier string so
that they don't act as bleeder resistors. Using something like a 9 megohm
resistor in series with a 1 megohm would give a 10:1 voltage ratio if the
voltmeter has a high ohms per volt. I know, this is not exact. But, close
enough for government work.
Most bleeder resistors don't have high tolerances so they can vary quite a bit
in relation to each other.
Glen, K9STH
Website: http://k9sth.com
--- On Wed, 12/17/08, Steve Flood <kk7uv@bresnan.net> wrote:
From: Steve Flood <kk7uv@bresnan.net>
Is it 'better' to meter the high voltage at the bottom of a bleeder string (I
have 8 100k resistors in a SB-220-style power supply), or is it 'better' to
build a seperate multiplier string between B+ and B- for the meter?
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|