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Andy, Congratulations on your new 7633. In its time, it was Tek's most powerful 100MHz analog storage mainframe. It is capable of all useful and not-so-useful storage modes that analog 'scopes

Tek's Concept Series are a good way to go. Since you've got a 7633, use its Operator's Manual, which is available for free online. It contains some pretty good introductory information on what you're

I need to take a look at that. I recently acquired a 7514 and I'm quite puzzled about how the anode lead makes it to the CRT. The HV out of the multiplier goes to a typical cylindrical anode-style

You might find useful information in the Tek Concepts Series volume on storage crts and circuits (see Tekwiki for "Concepts Series"). Even though it isn't written as a how-to-use manual, knowing how

The better choice is the 3A6, which is just a 3A1 with a delay line, so the scope can display the event that triggers the sweep. I've only got one 3A1, but I have several 3A6s, all in good cosmetic

I've got several 3B3s, all in good working and cosmetic condition. Make me an offer. I always thought the 3B4 was the better timebase plugin. Should I take a better look at the 3B3?

A simultaneous failure of all trimmers is highly improbable. Your problem is elsewhere. Possibilities include: Bad connection at input BNC, poor contacts at attenuator socket pins, etc. So, your plan

I have just become the proud owner of a 7633. Back in the day, I did not get any serious exposure to analog storage scopes, and I have used DSOs for this purpose for many years. Reading the 7633

Hi John, All ceramic trimmers have some effect when turned. So, I assume none of them are open. It seems strange to me that after a year of use the plugin suddenly exhibits such behavior. Can a

Max, Some plugins of that era had small ceramic trimmers that went open circuit. See if one of the trimmers does not seem to have the effect implied by the calibration procedure. --John Gord

Hi all, I reopen this thread because a few days ago suddenly the step response became very bad. I've added a new photo here: /g/TekScopes/photo/262075/3428607 I tried to tweak the

The following photos have been uploaded to the 7A16A step response (with 7854) ( /g/TekScopes/album?id=262075 ) album of the [email protected] group. * 7A16A_2ns_faulty.jpg (

I have a 3A1. It's pretty nice. I also have a couple of 2A63's, a 3A74, a 3A9, a 3L5, a Nelson-Ross PSA321, and a Nelson-Ross Model ??. Can't remember the model number. Have a 067-0581-00 calibration

The 2B67 is a decent, although basic, timebase. I don't have one, but I do have a 67, which is the predecessor of the 2B67. Just doesn't have single sweep. Until I got the 3B4 restored, that was what

I certainly don't have all the 560 series time-bases, but I have a few. As for usefulness, the 3B3 is at the top. Pretty much next is the 3B4. And I can feel your pain Joel. I don't need another 3B3,

I would love to have a 3B3. I have been halfway looking for one to jump in my lap, but it hasn't happened yet. All I have for my 561A and R564B Mod 121 for timebases is 2 2B67's.

All suggestions a comments are help Joel, and I take them into consideration. When I hook it back up to the scope with the extender, the voltage checks will find the problem, if it is rail related.

Okay, so we know the problem is within the 3B3. I'd start by putting your two 3B3s side by side and comparing the wiring of the plugin connector. Start with the 2 wires for the horizontal output. If

Well, I must respectively disagree. My opinion is that the B Sweeps should be superimposed over the top of their respective Time Markers. My reasoning is that I believe that this is calibrating the

Hi Ozan, The 10v on TP901 is solid. Don't see any problems there. The output of U903, the OpAmp, is swinging +/-1.7v and TP911 on U900 is +/-10v, so that also looks to be ok. Since this is turning