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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

AHA ! /g/TekScopes/photo/77251/1?p=Name,,,20,1,0,0 That is a piece of blank PC board on the left there grounded by a clip lead. The trace is smaller than it looks in the picture, I

Well well well, Q4566 open. A depletion mode FET, and I couldn't find one. I look at the print, I think about those 2N7000s I got. I look at the print again. I think about the 2N7000s again. All they

Bert Haskins...... Calling Bert Haskins...calling Bert Haskins ....CALLING BERT HASKINS Confusion reigns....I'm only new here....I don't know whether this reply goes to you or Fabio. I'm a bit of a

I have recently acquired a spare CRT for my 2465BCT and am trying to understand the markings as follows: P/N?: 154-0850-00 S/N?: 149403 Other?: 41-91 Is this possibly a date code, perhaps

" Or, you could just slide the blue filter up, and out at the bottom and remove it. The gorp might be just there. " Thank you Chuck. I did not know you could do that. It was rather easy and it cleaned

Ok Fabio...finally I see it ...well some of it....Is that Brazilian site related to Bert? There's no contact detail for him. Can you assist there?...The vertical on the Brazilian site is "identical"

Hi again for your interesting information. Amongst it you wrote "But Bert already chimed in that he has a NOS 465M module... so I think you already have a good lead" I didn't receive that....was it

I found one more fast part. If you happen to have an MPSH55 in your junk box, or you can get one more easily than a BC556 or KSA992 (Netty Electronics has a few dozen left), it will do great with

Or, you could just slide the blue filter up, and out at the bottom and remove it. The gorp might be just there. -Chuck Harris David Kuhn wrote:

Hi Fred, Make a note to yourself - Craig is much smarter than me for several reasons: He knew the answer right away; He was able to describe it in one paragraph; He had a better way to test this with

Any digital scope is a sampling system, so it looks at a waveform, does an average during the sample period, and then ignores the signal to the next sampling period. Pretty much as long as you sample

hello all similiar hi my usual problem with the tektronix 475 voltages as of now: 50v 33 v 50v a reg 67 105-160v 132 + 15v 5.53 5v 3.25 -15v -8..8 -8v -5.12 110v 86.4v What could be the cause? if you

Okay, I think the analog would be more useful possibly in trouble-shooting, but I am so experienced in the TDS3000 series, that I love trouble-shooting with it, plus I know the equipment so well that