https://indianapolis.craigslist.org/ele/d/indianapolis-tektronix-516-oscilloscope/7457356704.html Craigslist 516 in Indianapolis, $150. I don't know the seller.

I tried to go to the museum page today and it takes me to a male ED drug seller site. Can someone contact them and let them know please?

Stephen, I was a nice situation that you found the culprit this way, especially because the specified condition in the Power Supply diagram is quite weird. I only noted that because I tried to

The vintageTEK Museum has restored a number of 468's and has some parts units left. We could supply these parts. Where are you located? -- Bob Haas

Rogerio, It occurred to me after my post is if you question if a resistor in the string is bad, unsolder one lead of one resistor. This makes the circuit an open circuit to anything on either end.

I'm looking for a source of a power switch 260-1849-00 for a 468 repair. Apparently this switch is used in a number of other scopes including 2445-series? I also need the 2-part control shaft

Thank you all for the replyes. I will try to follow the traces, although this might prove to be difficult in the577 without taking out the PCB. Regards, Roger

If this is purely capacitive (i.e., the cap hasn’t started leaking, which adds a resistive component), this would be indicative a few nF. I don’t remember if you said what mains frequency and

Brian, That article from allaboutcircuits sounds very familiar, but reading it now I think I took too strong an implication from their discussion: that both X and Y had mandated failure modes, and

Hi all, Taking into account all your recommendations and suggestions, I finally fixed my Type 106. While I was about to make more measurements on the A supply, R233 burnt almost instantly after I

I seemed to remember something about particular failure modes - open & short so I looked around online. The pages below are general ones not manufacturer sites. A few online sources state that the X

Barry, Thanks for correcting me about cam switches. I figured they were from 1 to _ from front to back. That would be the logical thing to do. The cam "numbering" I too can get confused with. Out

I ran into this with at least one 7000-series plugin. If I recall correctly, the switch contacts weren't numbered from front to back, back to front, or any other scheme I could identify. It was a

Rogerio, Contact 1 should be the same on a cam as a rotary switch. The first contact number should be the closest to the front/shaft. Ryder's manuals showed the 1 parts of the switches with layered

Hi Mark, Thank you for your reply. Is this convention used for the cam switches also? If affirmative, contact 1 would be the closest to the "front" or shaft . Regads, Roger

Rogerio, The F and R are front and rear. One is the wafer closest to the shaft behind the metal wafer with the collar for the shaft. Position 1 is usually the fully CCW (anticlockwise) rotation

Dear all, I am trying to fix a Tek 577 and would like to check the operation of some specific contacts of the Step Offset Ampl cam switch as well as the 177 Vertical Cuurent/Div rotary switch I can

Hi everyone. I am unable to complete the calibration of a 577/177 I am working on. I narrowed down the possible culprits to the vertical amplifier (in the 577) or the vertical pre-amplifier (in the

Thanks for that, Peter. Raymond

There are 7000-series scopes beside the 7104 that X-Y phase compensation boards. As far as I can tell it was standard in the 7503 and 7504 in 1969, and optional in later models, e.g. the 7704 (Opt.2)