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Re: 465B Z-axis?
Here are a few more pictures. With a signal, you can see slight "ghosting" It won't focus in clear. You can also see some noise in the waveform that scans along the wave.
Hello everyone, I have a Tektronix 465B with a small issue: There seems to be some Z-axis modulation of some kind. I will attach a pic of the screen. When there is supposed to be a straight trace, you get some chops in the trace. It is most noticeable at slower times. Also, at faster times...
What I mean by "another light source" is I took the covers off and shine a flashlight back and forth. What capacitor is responsible for decoupling? I rebuilt the entire pre-amp, so all parts are new and know to be good.
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By the way, I thought that was a direct link to...
Also, would polarized or non-polarized be more appropriate?
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The popping is present whether or not there is a signal present. Also, if you take the bulbs out and use another light source, no popping. Would it be safe to put in caps higher than 68uf?
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Hello everyone! I have an old Fender Rhodes electric piano I am rebuilding and I have a question. It uses a stereo pan circuit which pans the signal back and forth between the left and right amplifiers. It does this with a simple oscillator circuit that drives two 2N3053 transistors (now...
I dropped the scope at the shop today. I'm sick of messing with it. I am waiting for an estimate. In the meantime, I've found a Tektronix TDS 320 Scope locally. What do you all think about this scope? How does it compare to my 2246?
The voltages are all well within the limits listed in the manual. As for the readout jitter pot, the only thing I could see affect that is the U701 Vert. Out amp. The pot itself checked exactly 5K and that 1k resistor connecting the wiper to U701 was perfect. I got about 1 volt on pin 23 when...
On the 55V and 15v lines, the meter won't register anything in AC mode, it blinks back and forth between 4 and 9V AC on the 15 volt line and 113V and 17V on the 55V line. It does this very quickly as the frequency bar along the bottom goes up and down. I'll attach a schematic of the power supply.
Ok, I checked the voltages for ripple...there is nothing over .006V AC on those DC supply lines. I have discovered something new that I do not think is right. There is a pot adjustment for "Readout Jitter" It is right by the HV part of the main board. If it is turned anywhere but fully...
They move. And there are more. In other modes, there are only 2 sets of dashes (there will be one set for every different readout item on the display) in LINE mode the multiply and are all over the place.
First of all, thank you for all your help. Secondly, I think it may be a power supply or trigger issue. Far fetched, but what about a bad AC Line filter? If you play with the timing and the trigger holdoff, with the right combinations, the problem disappears completely. It is like this on...
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