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Scale Factors nearly off the bottom of the screen on my 2465A


 

Hi All. On my 2465A the scale factors are readable and seem to be accurate but they are nearly off the bottom of the screen. I have to look at an angle to read them. Is there an adjustment that is necessary to bring them back into view? Or do I just need to learn to stand on my tip toes!

Everything else seems to fine with the scope... but this is pretty annoying.

Thanks in advance for any advice.

John w.
N7ZMG


 

John,

Look for pots R2918 and R2931 on the A5 board. These are the centering and gain. Usually the centering pot is centered and the gain is adjusted. Resistors R710 and R910 on the A1 board could be too high. The latter is for the horizontal section. These I replaced with a pair of 20meg 1% in series in my B version. The original 39 meg 1/4W carbons were almost 60 meg in mine.

Mark