On Thu, 17 Jun 2004 02:39:33 GMT, James wrote:

|1. Must all the tubes be in socket to check DC. voltages from
|bottom?? Some tubes are deeply burried in chasis and impossible to
|measure from bottom. By removing tube and checking pin from top of
|chasis - it would be possible to measure volts. Is this OK ?

Depends. If there is any resistance between the power supply and the
tube element(s) and the element draws current then the reading(s) will
be in error. For example a control grid in a class A stage will not
draw current and the voltage reading will be accurate. A screen grid
may or may not draw appreciable current thus the reading might be in
error.
|
|2. I have no VTVM. Can a modern Fluke voltmeter be used ?

Yes.

Wes N7WS