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like For 50 ohms explanation you need to read Tek's Concepts and Circuits books on this topic. The two probe books are downloadable from here http://www.slack.com/concepts.html There is one on

Hey guys, I am still pretty new to this forum, as well as my understanding of the inner workings of oscilloscopes. I've been following Kent Lundberg's "Reading Jim Williams" blog and found it very

With the BW of the 2247, this is correct. With higher BW scopes, such as the 2265 and TDS 3000 series more than just the input C matching needs to be considered. The probe series compensation

Bob Check your E-mails. I have an xfmr for you.

To kill two birds with one stone if you will I will reply here: “Rob can you confirm if the 7704A shows any dot without plugins installed?” After alignment the 7K scopes in general do not

The horizontal U700 shown a CTO in pin 7 cap made in PCB, I suppose for the fastest sweep,could for any reason this cap increase his value..dirt perhaps..? Can I remove the heat-sink of U700 to see

Hi Nick!. The 2246 input channel has a X10 & X100 att controlled by K102 & K103 at the front end of U112. At the back end of U112 you have an other att X1,X2,X5 controlled by K104 & K105 . There may

I found that my cheap Chinese AideTek x1/x10 100MHz probes which are rated from 15pF to 35pF actually managed to barely make it to 47pF on my 7A22. For best performance, the probes used for

Thank you for your input. Even into the 7103 the 7A26 limited to 20MHz shows a thin trace. As for the 7A22 input capacitance, I have two of them recently acquired, and only one old (cheap) 60MHz

My 7603 (100 MHz) CRT has a lot of hours on it but comparing it to my faster 7000 series oscilloscopes, I find that the plug-in matters more than the mainframe as far as noise which is what I would

A "meshless" CRT would have to be much longer to achieve the same deflection (screen display size) at the bandwidths of the upper 7000 series. The fuzziness and other abberations due to the electron

Thanks for the replies. iglesia_cristiana_arpas_eternas, I am not sure what you mean by the "back attenuator works with the front one" I do see where there is a cascading arrangement, meaning, the

From time to time, people will attach pictures to their Tekscopes emails and it becomes a mystery to me as to where the attachments go. If you log into yahoo groups, (this is the link I used,

Hello Kurt, well, my point is that I do not see any contradiction here. When it comes to switchable 50 Ohm/1 Meg-Ohm inputs, I am only familiar with the input attenuators of Tek 24xx o'scopes. In

Re trace width- Most, if not all, of the 7K series scopes have an expansion mesh in the CRT which effectively blurs the trace to some degree. There has been some debate about whether a mesh-less

Thank you david and all for your opinions. Yesterday I had problems with personal email and send the messages using online yahoo form, but the second message seem that has gone lost, I cannot find it

Wanted to buy High voltage transformer for 464 storage oscilloscope. part # 120-0909-00 . The transformer is also used in 466 oscilloscope.

I have been using the Nichicon PW series as general replacements since they are inexpensive, long life, low impedance, and available up to 450 volts. Unfortunately I have found no equivalent axial

wrote: I was surprised by the simplicity of the 7904 versus the 7834. It was mostly empty space inside but I should have expected that. I have a 547 and while it is definitely sharper than my 7