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Chuck, The 7D20T did not require anything extra from the 7D20. Any production 7D20 will function in the T package without modification. You could add the rear access cable for the GPIB that had a

Ok, here's where I'm at. ALL of the electrolytics, except the two big ones in the back, have been replaced. I tested them and they were all good with very low ESR so I'll toss them in a box for now.

I am having issues with a 2445 Oscilloscope that is not showing the A horizontal sweep. The “B” sweep appears when the B delayed time base is used. The readout shows some dots on the bottom line

I believe I've narrowed the issue to the probe tip, as you've suggested. Seems hitting it with a shot of cold air will calm the oscillation for a short period of time. The probe tip seems to be an

You're of course absolutely correct about the numbers in my example, Bruce. My approximation is only valid if R >> 1/(2 * pi * f * C), in which case R as a parallel R may be ignored. In my example it

Wrong, when calculating the impedance of a parallel R +C the 90 degree phase shift should be taken into account. The input impedance is actually closer to 550 ohms. Bruce

At higher frequencies the P6249 is a lighter load than the P6158, not because of its 20 kOhm parallel resistance vs. the P6158's 1 kOhm, but because its input capacity is significantly lower (< 1 pF)

There are a number of tricks.? One is to put a current limited supply on the +15.? Adjust the supply to +15 volts and the current limit to roughly between 50 ma to 100 ma.? Look for the lowest

Frank, Ray, I recently needed to measure some 600 MHz clock signals and the folks I was working with were not convinced that probe and scope bandwidth was so important, so I came up with this data.

To reply to my own message again , the TDS3PRT printer I purchased from an overseas seller arrived yesterday, but without instructions or accessories. Upon examination I found the platen knob to be

The only non-Tektronix scope that can accept Tektronix letter- and 1-series plugins is the Lavoie clone AFAIK. http://w140.com/tekwiki/wiki/Lavoie_LA-265A

Hi Phil, I have (found) two of the tiny screw-in probe tips, NOS, that I can part with. How about a (free) NOS witch hat (015-0135-00) for your P6201 or do you have one? When I purchased components

I asked the gentleman in question to plug in the 2465B, 2465, and the second 2445 to take a picture and see if there were a visible screen. He said no. I again wrote back to say it would take 5

As I recall, there was a variation of the 7D20 that was called the 7D20T, that fit in its own chassis, and was used in conjunction with computers to gather data. A picture is shown on page 338 of the

At least one, ideally two. NL->UK shipping is fine, I can't see that being too expensive! How much are you asking for the probe tips? I've found a few ebay listings in the US but either the price or

This 466 worked great for years, then suddenly I smelled something burning, and the fan stopped. All low voltages good on interface board, *except* for +15VDC. Reads about 4VDC, (and about 4 ohms to

Have you used the P6158 probes with this scope, and if you have, what are the drawbacks of the P6158 compared to the P6249? Thanks, - Frank