On 11 Oct 2012 at 16:49, TekScopes@... wrote:
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__ 3a. sc502 glow
Posted by: "jerry massengale" j_massengale@... hojo3008
Date: Thu Oct 11, 2012 8:50 am ((PDT))
Hi,
goldeb rubi has an sc502 for sale on the bay that seems to have a
flooded display. how can that be? see 110962526159
Jerry Massengale
The X10 magnifier is on (TB variable knob pulled out) and the intensity
turned up. The expanded trace is "reflecting" from the inside of the
tube envelope. (Electron scattering.)
All tubes do that to a greater or lesser degree.
73.
Dave B.
