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That is correct. Raymond

Eric, I am pretty certain that the 455/465/475 use a linear power supply. That is the purpose of the big heavy transformer in the back of the scope. If it was a SMPS then there would be no need for

Hi Jim, The artifacts that I was referring to don't show up on standard 'scope calibrators. Those only allow you to adjust "LF" behavior with a 1 kHz square wave (flat top). I meant fast-edge

I would test the rectifiers the silicon is usually pretty resilient and normally grossly fails "open or short". I have only run in to one transistor so far that has "kind of" failed that one took a

Bruce, Another critical peace of advice. Before you tare something down take a TON of picture from ALL angles. This will aid you in reassembly. A digital camera in the lab can save you hours in a

Martin, ??? Unfortunatly I can answer that. I have the tube in question it is weak. It is doing a double ramp but this one is slightly weak. I have a second tube as well that is VERY weak. I have

I agree. I recently grabbed a P6139A out of Raytheon Technologies (RTX, my day job) e-waste bin and found that it works well with my 400 MHz HP 54504A scope (also an RTX rescue). I was able to adjust

James, Maybe my earlier response was a bit terse and therefore limited. The general answer to your question "Is this probe a good match for my scope?" should be "no". Chuck's answer and mine show you

If you're going to the trouble of ordering new ones and replacing, I believe it's also now understood to be good practice to de-rate tantalums by *at least* 2 x the operating voltage. (In these lists

Tektronix tweaked the probes meant for the 2465B to match the response of the inputs on the 2465B, so for specified performance, only a p6137 will do. But, likely you will never notice the difference.

Hi Bruce, Okay - I was thinking the 475's caps were the same as the 465 but perhaps not. It's a custom board I designed and had manufactured. BTW, if you notice, the board shown has a trace that had

Many enthusiastic youngsters had comparable experiences with instrument companies in the 1960s. General Electric and to a lesser degree RCA were also very kind to young hams and experimenters. I spent

Stephen, I think it would be pretty simple to put an Arduino board inside the 4041 case - connected to the internal keyboard header, plus my resistor mod so the Arduino could direct drive serial into

It would be insofar as bandwidth is concerned. The transient response however is not matched to the input characteristics of the 2465B. It'll work but signal fidelity will not be optimal, resulting in

Ryan, has that CRT been taken? If not, I would be interested, does the screen appear burned? My 576 works, but has a completely dead spot where the intensity was left too high with a static spot

Wiring restored to original and now it's working. Going to go through the full test and cal procedures to see how it's behaving now.

This is intended for use with some TDS scopes and has a 500MHz bandwidth. So probably ok with a 400MHz scope. They also have a problem which can render them scrap. See:

Monty, Good to see you have now established communication with the keyboard port. You are correct that the COMM0 port description is required for a 4041 with the dual RS232 port option. I use the same

Hello Dennis, Denis Cobley was his name, I spelt it incorrectly. If you look up the old messages you will find him. In regards to test equipment repairs, Magic flowed from his hands and he had an

Hi All, I may have done this, but I don't think so: /g/TekScopes/photo/247625/0?p=Created,,,20,2,0,0. Note the cap and resistor are supposed to be soldered to one another, but the