I have a very nice 549 that I have owned for nearly 35 years. It worked flawlessly at first, but then began showing the infamous epoxy HV transformer potting issue. Back when it started doing this ('8

New member here. 2 Months ago purchased an older 465 scope on the auction site. It worked for approximately 2 days begore the trace went dead. After lengthy searches on this and other forums I traced

Hi folks, I have been trying to read the content of the Dallas DS1486 of my TDS684A before trying to desolder it. The battery is really low since it is necessary to run SPC calibration every time I tu

I have a 465B that is looking good and running well, except that the coupler for ch 2 amplitude var coupler is broken. Check these two tweets in a twitter thread for images of the broken part includin

The other day, I was given an SR760, presumably with a faulty CRT. I don't know where else to go for help, so I'm turning to you guys and girls. If someone can recommend a place to seek help, please d

Hi, Since I’ve had this scope (2235), it’s one that I enjoy using because it’s fairly light in comparison to my other ones; the form factor is convenient. And it gets the job done for my needs. Howeve

Hi guys Happy New Year to all. I'm new in the group. I've bought a working (supposed to) Tek 485 for a few euros here in France : received it and tried it for ~10mn. I powered it off and cannot power

Hi, I have a Tek 2235 serial (no letter) 203946 with a long persistence orange screen. On the front it states "opt 76", which I cannot find in manuals or catalogues. Could someone point me to more inf

Hi I am trying to fix an tektronix 7L12 spectrum analyzer! When measuring a frquency-say 50Mhz-it is offset on screen--the zero hertz are shown clearly with same offset!. Have any off you some experie

I mailed all of the international orders for Peter Keller's book today with the exception of the five going in one package to the United Kingdom via UPS. Those will be mailed as soon as I get the pape

Hello all: Having replaced the PSU (ref. 2465B Power Supply Precautions) have just powered on, J119 voltages perfect, test have some issues eg TEST 05 FAIL 42, but basically working. Had no trigger, t

Hello, I have been lucky to find a P6042 current probe with a fully functional coil and hall sensor. The only band thing is that the cable to the sensor was broken in at least 7 places. It is repaired

Hey folks, Wondering if there is someone here who is a readout system whisperer. I have me a 7904 that wasn't working when I got it. It's a rather interesting one, with all available options equipped.

Dear Sirs, I got hold of a 7L13 spectrum analyzer in a 7603 mainframe and I have two questions to ask you, first from the manual the tuning knob can be pushed or pulled to change the tuning speed, but

I have a 214 that I bought a number of years ago. It had bad batteries, no probes, a broken store/normal/reset switch, and (as I find out) a bad channel A vertical gain switch. Fixed the batteries by

Hi, recently I have become aware of this group and the interesting topics discussed here. For more than 40 years I have been fixing almost anything as a hobby - from 1930s radios and all kind of TV se

Hi guys, Just putting the word out. I’m looking for a 465B tigger pot with switch, parts number: 311-1192-00 QService doesn’t have one at the moments. So if you have one for sale, hit me off line. Tha

With a spare HV multiplier sent from the UK by a fellow radio amateur, I managed to get the HV supply in my 465 working. (Has anyone told you guys that working on these things is NOT easy?) The HV pro

I am working on 2 Tektronix function generators. An FG 507 and a FG 502 both 2 Mhz. The 507 is on the bench currently and I am having a weird issue with the frequency selectors. Everything above 100X

Hi Jon, I always stick a repaired/recapped power supply on a dummy load and check its voltages on the bench before I put it into a scope. Saves a lot of frustration, and damage. If you know the supply