from Tim P (UK) re the 555, I've often wondered why the timebases were made plug-in. Was it just for servicing, or was someone at Tek thinking about specialised units (TDR, sampling, etc)? According

Just to chime in. I got a 555 some years back with 2 CA, and a D. I have since added a W, and 1A7. I’ll not mention the initial price, as it was phenomenal. The crt has the purple/blue phosphor for

Yes, the spacings look like you're ready for 40kV!

I'm trying to understand where to start looking for the defect and I really appreciate any help. Checking the service manual, there is a defect flowchart. In the Parametric measuremet trobleshooting

Vídeo with the fail: https://youtu.be/9RO12A-TQbs

Ernesto expressed interest in a thread about the Type 555, so let's see if it'll fly! :-) For any bench project within the vertical bandwidth of the 555, it's my favorite oscilloscope and has been

This is artistry. I'm in awe. --Toby

That looks rather nicely laid out. Clearly will be a beast when you're done! Look forward to more info. yahoo.com@groups.io> wrote:

WTF do you need to test? -----Mensaje original----- De: TekScopes@groups.io [mailto:TekScopes@groups.io] En nombre de Ed Breya via Groups.Io Enviado el: martes, 25 de febrero de 2020 21:05 Para:

Here are some pictures that should give a pretty good idea of what it is - or at least what it looks like. https://groups.io/g/TekScopes/album?id=241896 I'll put up some descriptive info later. Ed

Hello. I hope to be able to resolve this defect with the help of the experienced technicians of this group. I hope that someone will have the patience and willingness to help me. In my ignorance, I

Hello, I have the same problem with my 2465B. Auto setup and measurements not working "Noisy or Aperiodic signal" The problem was there when I got the scope rest seems to work fine. So far I tried

Fluorescent lamps are mercury vapor lamps, and mercury vapor, when ionized, emits predominantly blue and ultraviolet. The phosphors that coat the tube turn this high energy UV into visible light,

I searched a lot here on the group and found this topic that I believe has the same defect as my

Thank you for your help. I'll try to explain it better: When I bought the scope, when connecting it to 220V (voltage from the mains network) the Rifa capacitors exploded. That was 2 years ago. At

Leandro, did you do a complete calibration? What was the cal status before backup of NVRAM? Did you do a DC bal? Your description points to lack of CAL. Do you have the required CAL

Do a search for osibatteries tektronix 212.  $22.00 per pack.  their site is broken right at the moment I'm posting, but Google gave the $22.00 USD result. The 211 uses the same batteries as the

Dave, Since fluorescent lamps use mercury vapor to generate UV which then excites the phosphor lining the tube, they do produce some UV output as the phosphor absorbs and converts most of it. The IV

I have a number of 7000-series plug-ins of varying ages. The intensity of the colors (silk screened? anodized?) definitely varies, but not always "oldest are most faded". I suspect it has to do with

I can't add anything except that I thought those colors were too deep, but since the "tek" logo is blue, it's a later model.  My 7B15s are all pretty washed out, and my later 7104s are as well.  In