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On Thu, Aug 16, 2018 at 03:43 PM, tom jobe wrote: > > Hi Leo, > Thanks for the progress report, It's good to see that your 2215A repairs > so far have gone well! > In studying your photos, it looks

Hi Leo, Thanks for the progress report, It's good to see that your 2215A repairs so far have gone well! In studying your photos, it looks like you have one of those dreaded "Schaffner" brand AC inlet

Yes and no. The ground lead for the probe, when properly attached, minimizes ringing on the signal. The long lead from chassis to chassis will not. For low frequency signals (especially sine waves),

Hi all, just a final message: it's all done! Today I received the 12V 60mm brushless fan that was a perfect fit. I used the half wave rectifier circuit I was able to place the components for on the

Which is optino 94 for a Tektronix 214? /g/TekScopes/photo/66992/0?p=Name,,,20,1,0,0

Hi Jennifer, It is appropriate to let the members of TekScopes know if you have any conflict of interest when you post an item for sale. Dennis Tillman W7PF

See http://www.eevblog.com/forum/repair/renovating-an-early-tektronix-475-oscilloscope-a-few-random-hints-and-tips/

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F362410334858

Yes, for best frequency response the ground lead should be short and the area between it and the probe minimal. You may see ringing and other strange stuff with your separate ground lead. Probably OK

Hello Folks, Thanks for all thoses interestings comments. As Ive reconnected the ground, and turned power ON : no differential main shut down occur, even when my finger played with chassis parts. I

Well, after a week on vacation, I replaced the old 18,000 uF, 16 V C821 with a new 22,000 uF, 25 V job that was the same diameter but less than half the length. I knew I was going to be out of town,

Our work benches vary quite a lot, and things found useful by some may not even be at others places: I have a relaltively common magnifying goose-neck lamp. The tubular fluorescent lamp surround a

Hi John, It's good to hear that you are making progress on your 475. Those large capacitors for the low voltage supplies in the aluminum cans often fail internally and do not show any bulging or other

On Wed, 15 Aug 2018 15:25:30 -0700, you wrote: >It turns out that C965 (Board A9), a tantalum bypass capacitor on the +15 rail had gone bad; removing brought the +15 rail resistance to ground back to

Look for a tantalum with a small hole in it.

It turns out that C965 (Board A9), a tantalum bypass capacitor on the +15 rail had gone bad; removing brought the +15 rail resistance to ground back to where it should be. Most of the capacitors look

to the electrostatic There are no such capacitors in the 453. Hence my comment regarding the primary capacitive coupling to the shield. I - er - looked at the schematic before I commented :-) Craig

Tantalums are really good when used properly. 1) ESR / ripple current rating MUST not be exceeded, creates internal self heating that will lead to internal shorts. 2) Use them for high frequency, low

As pointed out by others, there are times and places when (at least you think) you need to make a floating measurement (independent of the local ground.) I’ve done this with mapping sonars that are

Agree with Jeff for 422 AC, just look around hardware and you might find one to fit without trimming. I trimmed a couple extension cords for mine.