The P11 phosphor is better for film but not your eyes. I would guess that the aluminum electrolytic capacitors in the power supply have expired. You may be able to tell by setting the trigger to

I have an original paper copy of this. It is 1/2 A paper size,about 1/2 inch thick with the English pages or about 30mm withGerman, French, and Spanish language instructions.  I can .pdf(I think)

I wanted to do an update for anyone that might have similar problems in the future. The scope powered up but had no sweep, just two dots on the screen. Troubleshooting disclosed Q701 was bad

Merchison, I think we have the root cause. I received my 10x probe today and after hooking it up to channel 1 and the 575 collector to channel 2 I began to see the noise. I immediately switched off

If somebody sends the document to me, I will put it on Tekwiki. [TekScopes] <TekScopes@...> wrote:

With “A” Sweep knob unlocked (pulled out) with calibration sig into Ch 1 With the A trigger level I can vary it, locks on and trace becomes stable Trigger view works. In the Lock

Fairly sure Craig Sawyers has one and knows all about them-ISTR postings on this reflector about them a few years back. DaveB, NZ

Walter, I forwarded you the 5 pages of the manual I have, which were kindly given to me by other members of this fine group. I have an A6901, but never used it in anger. You need to make sure line

David, C5020 and C4020 (nearby) IMHO simply provide low frequency PS decoupling in a crowded portion of the PCB. The way they are drawn on schematic (2) associated with 2 different opamps is IMHO

There is lots! of material in the archives concerning the drama connected with the tunnel diode triggering system of the 465/475 scopes.

Hopefully someboy out there has at least a user manual for this nice looking unit. It appears to be a test fixture that breaks the ground connection to a unit under test, but I do not undertand if t

Congratulations on the great gift! A 485 is a really nice instrument.... As you said, not only can you not calibrate via software, there is no software in it! :-) A nice facet of that is that it

r221b0 Have you tried running the cal routine yet? I suspect the cal routine will step you through complete processes. It may offer several menu paths i.e. one for horiz another for vert etc. A

If you look at the line (60 Hz) input to the 575, do you still see the break in the waveform? If you do, turn off the 575 and check the line input again. If the break is still there, then the cause

Siggi: You never know what to expect. I have seen some scopes that had spent years in an industrial environment - complete with corrosive atmosphere and callus-fingered technicians who never heard

Hey y'all, my wife gave me a crusty old 485 for Christmas - how lucky am I :). I've been curious to look inside 70s vintage Tek scopes as those are all-analog and mostly discrete. In particular

I have an actual svc manual for the scope. Keith Sent: Friday, December 26, 2014 11:08 AM To: TekScopes@... Subject: Re: [TekScopes] Re: More Info RE: Tektronix 475A x-y discussion

artekmanuals.com <http://artekmanuals.com/> dave has some of the best scanned stuff… he cared enough to do it right. and they are reasonable in price 7 to 15 $ downloadable in

Raymond: Thank you for responding. Yes, it is much less than a second. It is only slightly perceptable, but gives the impression that something is amiss. I wish it had not been designed into the

Hey guys, Here's a photo of the 575's collector sine wave with a 1K resistor between C&E and no DUT. As you can see, the problem persists. Does this look like a typical bad cap discharge issue....or