Replies interleaved: That'll help later. Then disconnecting the rectifiers can be useful, but I wouldn't do that at the moment. Firstly, and I'm looking at one of the schematics. What's the

+160V is depends on +140V (not the other way around). +160V is regulated by +140V plus VR1712. +140V could be low because it is in current limit (i.e. a problem downstream from +140V regulator).

Gidday Morris Interface-? The plugin connector etc on the rear- or something in addition? I have a few plugin frames plus plugin connector here-remains of old mil versions of 7k plugins that were

Just checked again and all is well with the site now.

Hi again. You wrote; " Didn't you find and replace some capacitors on another board? " So far (and on four of the boards) I have found and replaced, damaged tantalum and electrolytic caps,

Hi all, After my experiences restoring the 7904 and other 7000 series scopes I would like to make something like Dennis Tillman's 7V10. I'm reluctant to hack a working plugin so this is an appeal for

From Italy the site is perfectly working to me. Max

From Spain also redirected to "a male improvement" site.... Leo

Confirmation DNS redirect most likely Jon

Hi Folks, I am looking for a source for the transformer from a Tek TM-501 Power Module. Mine seems to have developed a short in one of the secondary windings and I'd like to repair the unit. The

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