[Test-Equipment] Scope questions: OT for Tek?

[Ron Youvan]

bonddaleena at aol.com wrote:

> Hi. I collect scopes (don't ask me why, some kind of sickness) ha ha
/*snip*/
> It works beautifully with a crisp display, but when I feed a signal to Channel one, the display is non-functional at .2 mv/div and higher, In other words, using the calibrator (or an external signal generator), I have a nice display until I start LOWERING the voltage/div. This is kinda opposite what seems likely. .1 V/div (and lower) looks OK and .2 V/div looks like ground. Channel Two is fine.

   Easy, put a signal in both inputs, set the same and signal trace back and forth between the two 
channels.

> Next the .......... Kenwood
>
> Using the calibrator signal as above, and the exact same settings, the scope looks like it is TRYING to work. I can see 'flashes' of light on the screen, but no traces. Pushing the "trace locator' produces a compressed, visible trace in the center of the screen, for each channel. I can use the 'position' knob to move these traces up and down. However, when I release this 'finder' button, the traces disappear and all I see are these low level flashes of light and I cannot locate the beams. It appears (!!) they are off screen.

   Step one.) compare the PS Voltages between the Kenwwod and the Leader carefully.
-- 
    Ron  KA4INM - The man who sets out to carry a cat by its tail learns something
                  that will always be useful and which never will grow dim or doubtful.
                                                                     -- Mark Twain.