Hello all,
I’ve been searching for repair information regarding a Tektronixs 465 oscilloscope and found this interesting website.
So, I just registered and like to introduce myself.
I’m Wilfred, 62 years old and living in the Netherlands.
My interests are electronics, in particular restoring the good old tube televisions and radio’s, Oldtimer cars and general technical things.
Recently I found a Tektronix 465 scope in a fairly good shape, with some issues though, but in a working condition.
The 100:1 attenuator on channel B needed replacement, capacitor C1552 as well.
Anyway, at some point I noticed that the beam was intermittent blurry due to the astigmatism.
Astigmatism could be adjusted but not within reach of the potentiometer.
It was even so that the scope reacted strange when I turned the potentiometer to one side, the illumination of the small light bulbs went too dark and also the beam disappeared.
Voltage on the grid seems to be okay, 0-110 V depending on adjustment.
I’m afraid that the picture tube has an shortage issue between grids, but like to know from the members experience if this would be he case indeed.
Thanks a lot for any reply and have a great day !
Wilfred
Wilfred