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Jim, In audio applications, when a huge filter cap is required, and not practical (usually due to cost), I use 2 smaller caps wired in parallel. In your case, I would use 2 x 10,000uF 105°C caps,

Why do you think "for the 7603"? Version -01 is called for in the 7603 calibration procedure. Version -02 is intended for the fastest scopes in the 7000 series including 7104. I don't know whether the

Thanks Adrian. What I was wondering was whether it could be externally connected in some way to another scope in order to calibrate that second scope. I suppose not based on the responses so far.

It will work with any 7000 series mainframe. This gives an outline and there's a link to the manual: http://w140.com/tekwiki/wiki/067-0587-02 Adrian

From what I've read, you should never trickle charge Ni-Mh batteries. I just replaced the Ni-Mh batteries in two of a set of three cordless phones. The phones have a controlled charging system, and

067-0587-02

Which calibration plugin? Craig

Tek scope noob question: Can the calibration plugin for the 7603 also be used in some way for calibrating other scopes too? Or just the 7603?

My (limited) understanding is that NiMH cells really don't like more than C/20 - and in many cases the definition of C is, um, very optimistic. I'd restrict trickle charging to C/40 or C/50 - but that

This inquiry is for the more knowledgeable folks on these scopes.. I have noted that there is a small red wire strung through the main harness from the switch pre amp to the trigger - Z axis board

FWIW, there is a Tektronix list at Yahoo called TekTronix_TECHs This seems to be mostly about Tektronix instruments other than scopes but may be of interest. The only other list I found when searching

Since the 7B80/85 use +5V it is not surprising that they don't work properly if your 5V is screwy. Craig

I wasn’t aware of another list! You mean there other scopes besides the three number ones?

This is absolutely the right list for those! Lots of people here collect and restore gear of that vintage. Craig

Yep, a 3300 uF cap jumpered across C821 smoothed out the voltage fairly nicely. The 18,000 uF C821 is toast! I have a feeling removing it is going to be a two-person job. Next order of business: there

Pretty sure this is the only one.? ? ?I have a 545, a 575, a 7854? ?(and a Telequipment D51 and some HP scopes) and this is definitely the place to discuss those old tube behemoths. ? Dan

There are some pictures of the guts at: https://groups.yahoo.com/neo/groups/hp_agilent_equipment/photos/albums/1325546042 Folder name: HP70843B 12 Gbps BERT More to follow Ed

Is there a mail list oriented to the older “Classic” Tek equipment? (I have a 547, a 545, and a 360 Indicator with 160 Power Supply.) Roy Roy Morgan k1lky68@... <mailto:k1lky68@...>

If by "intensified beam" you mean the mode where the "selected" portion of the delaying sweep is brightened, then yes, there is. The problem is that I am only seeing the brightened part but not the

I have a couple control panels from a machine tool where the design was for the Varta 3.6V 70mAh batteries that were common on computer motherboards. When they became NLA, the company started using