开云体育

Hi thanks Harvey....yes that's about it.....time saving with a good spares inventory ....replace the faulty aspect of equipment and then send through the system to component level repairs. Repair was

Hi Raymond, My records show he has never posted on TekScopes since we switched to Groups.io in Dec 2017. There were no posts from him on July 18 of this year either. Dennis Tillman W7PF

ok, all I recall is I was told ( by the counter tech at tektronix in sunnyvale when my 475 went in for cal service eons ago... ) the case had to be on for something due to sensitivity/shielding and

He's active on EEVBlog forum, last post was yesterday. http://www.eevblog.com/forum/profile/?area=showposts;u=93452

FYI: I'm missing contributions from our long time, very active, helpful and knowledgeable member David Hess. As far as I can see, his last message on this forum is from July 18th. On October 7th, I

Well Dennis - I learned something there! I have a 7CT1N (no surprise there!) and have only occasionally used it for low power bipolars. I would have missed the oddball electrode mapping between

Hi Raymond, That was the easy part, the photo shows he was using a 7633 scope (lucky guy to own one of those) so it had to be a 7CT1N. Slightly harder was verifying that the traces on the screen are

On Fri, Nov 2, 2018 at 06:37 PM, Dennis Tillman W7PF wrote: Hi Dennis, > > COMMON MISTAKE: Your photo shows you did not switch the Drain and the Gate > leads when you were using the 7CT1N. I believe

I've never had a need to do any of these adjustments externally, "in the field" so to say, using 464, 465(B), 466 and 475(A) scopes for decades. The "construction" allows unguided poking at least 1.5"

Hi, COMMON MISTAKE: Your photo shows you did not switch the Drain and the Gate leads when you were using the 7CT1N. I believe when you do switch them that you will see there is nothing wrong with the

Yes that is the fet in the curve tracer. I hope I didn't blow it up trying to curve trace it.

Not precisely sure what I'm looking at. Is that the said FET on a 7CT1N in your 'scope? Because if it is, I would say that was an ex-FET. It has gone to join the choir eternal.

I don't remember it that way. The entire 475 can be calibrated sitting out of its case on the bench. The entire 465 family can be calibrated sitting out of its case on the bench. The adjustment holes

These holes provide access to e.g. vertical position, attenuator balance and DC gain settings. They are there as a convenience to allow some adjustments "in the field" without opening the case. These

check the side of the case there may be "holes" for some of the sensitive adjustments. there are on a 475 and the case needs to be installed for those adjustments. Renée

After messing around this is the trace I get. /g/TekScopes/photo/77313/0?p=Name,,,20,1,0,0

I just put this fet (151-1121-00) on the curve tracer and get nothing. should I follow the same procedure to trace this fet as a 151-1042-00 --- S2089? Or is something different? The 151-1121-00 in

That's a very good point. When I was using CFL illumination in a desk lamp, at my bench, I used to see a lot of excess noise signals in hi gain, hi-Z circuitry. In addition, carrying a smart phone

No, it is not normal although the area is sensitive to external signals, like hum; you're covering and grounding a high-impedance part of the vertical input amp, directly after the attenuator block

Definitely not normal! If tektronix needed you to put a special shield there, there would be a shield with a part number specified in the list of things required for calibration. What you have is