Wow, too bad that I am too far away. I love the 535 series and to top it off, has a Type D plug-in. I am always looking for those.....

Hello everyone! I have been wanting to get my 535A into calibration, but according to the manual I need an EP53A gain set adapter which I will also use with my 533A and my 545A when the time comes. Ho

HI everyone! I thought I would take my 564 out and see what I possibly do to get the storage section of the CRT working again. I fired up the scope and only to find that absolutely nothing worked. I m

I would love to have that scope as well, but too far away and looks like the CRT has seen better days with the 2 rather nasty burn ins. Hopefully the HV transformer is decent and not lossy as I have r

Hello everyone! I have a Tektronix 310A serial number 016911 that I have had in my shop area for quite some time. When I first got it, I only got a very faint trace and was only sweeping 3 divisions i

I haven't tried that. I have gotten so confused as to which spray to clean them out. Seems like everyone in the forums has their own opinion and what spray should be used for pots. I myself get a litt

I am sorry everyone...I meant to say the intensity pots are the ones that I am having an issue with, not the focus pots, my bad. Those pots are 5M .2W as well and labeled R856 for the upper and R879 f

Hello everyone! I have a Tektronix RM565 Dual Beam scope that works great and have been using it for the last 2 years. The issue that I have is the focus pots for both the upper and lower is starting

Hello John! I have noticed the same trend myself. But I have am very interested in these 500 series scopes, for me, they are a real pleasure to use and at the time, reminds me of how much thought and

Hello everyone! I just got a Tektronix 3A72 plug in, and it seems like it spent a LOT of time in the sun. The red knobs lost their color and the red writing is practically gone. I have to look really

Hello Tim and ty for the info and I am aware of this. However, I am asking folks on this forum if there is a way that I could get the graticules show red instead of white on my scopes such as the 561A

Hello everyone, I just wanted your input on something. This is about the graticule lighting in Tektronix scopes. I have a 310A, 503, 531 and a 545a that has the red "paint" for the graticule and I rea

Hello Jacob! I am the one that is needing a CRT for the 561A. I am also interested in that cart for the scope as well if you still have it. I just haven't been able to work on this scope lately, have

Hello, I should have mentioned that my 561A has the all glass style. That's why I was mentioning the 4 cushions that are inside the CRT shield not wanting to let the CRT out. My other working 561A is

Hello Xnke, I would certainly be interested in the spare CRT and the scope cart since I only have 1 for now. But my main concern is getting the old CRT out of the 561A. Something has a death grip in t

Hello! To Mike: I have measured the resistance of the CRT heater filaments again and the reading was 5.22M ohms. You are right, that it's strange that there's a reading, usually would be infinite. I m

Thanks so much Harvey for your input! I have a few more details which may help others help me with this issue. According to the schematic that I have downloaded from tekwiki site, the 5642 rectifier t

Hello everyone, I just got my hands on a nice looking Tektronix 561A, and has some problems. I did see some searches on the HV issue with the power transformer for the CRT heater. I spent some time ch

Thank you very much Dave Wise, I didn't know that those capacitors would have been original. I have a lot to learn about these old scopes. I had assumed that they had been replaced at one point since

And thank you Bob, Morris and Dave Wise for your reply. I thought that the 1n4007 would be good enough, just wanted to double check. The diodes are on a PCB where the selenium rectifiers were and also