The DC resistance in parallel with the capacitor must be measured as it affects the AC measurement. If the diode conducts during either measurement, the results are not accurate. This is what the

Albert, This is the first time I have worked with the 7XXX series as far as repairs is concerned. I have 2 of these scopes, but this is the first problem that I have had to deal with. I fixed a

Ceterum censeo https://groups.io/g/TekScopes/message/164943 Grüße, Carsten

Reg, The "o)" symbol is a BNC connector. The ")" represents the grounded shield on the BNC connector, the "o" represents the center pin. One "o)" connector connects to the function generator, and

Check the voltages on the CRT astigmatism and geometry electrodes. Stephen

Roy, That article appears to me to be largely garbage. It states that they found 16.3% methanol in rafia palm wine in Nigeria.... Rafia palm wine is *not* a distilled product. They then went on

Chuck, I'm afraid I don't understand the diagram or the explanation. If there is a resistor in parallel with the cap, how much of the resistance is the resistor and how much is the ESR of the cap?

You can always take the engineer's way out, and use your scope (OS) and a function generator (FUNC). ...................................... FUNC

Hi Michael, I would indeed start with checks on the logic board <2>. The Theory is quite clear about signal levels and paths. In both mainframe ALT and plugin ALT the flip-flop U156A is involved

Michael,     I would imagine that with modern manufacturing you could source higher precision resisters then what was available at the time anywhere. I know precision resister can run around

Bad news come in pairs, threes, something. Just did my search on the 311-1404-00 and this thread was second hit!! I'm in need of the same item for a 7613. Anybody find one laying around looking

Hi all: Well, probably...yes and probably no. Probably, yes... if, it is all and only "... yeast digested sugars..." However, if you are not in the lab, doing fractional distillation, using a reflux

Does anyone have any experience with the B&K 881? It appears to provide the same testing as the EDS-88A for about $75 less. In fact looks like an outright copy with minor changes. Of course, that

Eric, Since I do not own the Calibration fixture, I rely on the -01 manual Cal Procedure, which does not require that fixture. The Fixture is great when you are doing 576 calibrations regularly or

Hi Tim, I recently experienced on an old oscilloscope weird changes in the trace depending on where it was positioned. Like a normal brightness on the right, with low brightness on the left, and it

Bill,     Yea it seems I tried to do a hard cal on even harder mode. I actually have the cal fixture which has been useful. I should not have to redo the hole calibration as the display amps are

Thanks, David. From the document from Hakan, it's only the center compartment that is wired for GPIB. Jim

Thanks, Hakan. I will have to take a closer look at the TM515. The pin 13/14 plastic barrier must not be in place because I could insert the PS501-1 into any slot easily. Jim

Eric I just went through Calibration of my 576 using the -01 version of the manual about a month ago. I don't remember which scope I used but it was probably my Tek 475 because it was on the bench

is this in reference to EDS-88A? pulled from Reg's comment?? or something else? I love zero context Renée