I have posted a couple of messages to the list in the last couple of days. None show up on the list or have been responded to. This is a test to see if this gets through. If I am being moderated it wo

In case anyone nearby and interested. It just hit craigslist yesterday. Looks like a good buy. https://portland.craigslist.org/wsc/ele/d/newberg-tektronix-475-oscilloscopes/7464954073.html

Hi I solved the issue. I was not the U2890. I was a broken trace underneath U2965- probably a result of the leaky capacitor and at that time for repair I did not notice the broken trace because it was

I'm still very new at learning how to use a scope, but I'm getting mighty frustrated. I bought a used 464 and have been able to get it to display a straight line as well as its square wave from the ca

I just received a 7704 and several of the card edge connectors on the main interface board have their left and right (or A and B?) covers falling off. They are not completely disintegrated yet, though

For your weekend browsing pleasure, we have added all kinds of interesting things to all the categories on the stuff page, hopefully you will see something you like. The connector area keeps getting b

Now all is successfully re-assembled and essentially operational.... but that does not mean correctly!! All PSU voltages are set correctly (a low +55V due to a faulty U712 had been upsetting all the o

I realize that this is off topic, but: Does anyone reading this use either an Ailtech 460 signal generator or the Adret 7100 version...? I have a couple of questions I need answers to before I can com

I was recently in a discussion about an HP scope that suddenly developed a ghost/reflection on the CRT that followed the beam image. The pictures of the effect showed exactly the same sort of thing th

Hi, with the time-base equal or slower than 1ms/scale I noticed "blank outs" on the trace when I turned on the readout. The blank out are about 1mm in length at the same horizontal position where the

I built a 28v unregulated power supply to run mil-surplus equipment that's capable of 150 amps DC. Basically a 5 KVA toroid transformer (240 volt primaries), a 200 amp bridge (big heatsink and fan-coo

Hi all, I know this is a common problem, and have seen a nice description here: https://forum.tek.com/viewtopic.php?f=568&t=138253&sid=c827508d3401e2cd90eb52f42415517a In his fix he replaced some of t

I have a number of tantalum capacitors in my spares. Is there a way to determine if these are prone to failure? I am not a design engineer, but, am toying with the idea of building a test jig to place

My 485 works fine but knob plastic cracked. Anyone have a spare?

hi, Anyone have a .pdf of the Tektronix " 576 set-up chart" ( 070-0970-01 ) that they can email ? thank you, Rik

I had a TDS3032 that would not remember its GPIB buss Address not the time and date, After some advice, I did order a Dallas DS1742W-150. It took about 6 weeks to get. So this afternoon, I carefully t

The following files and folders have been uploaded to the Files area of the TekScopes@groups.io group. /TDS3032 NVRAM.pdf By: DH7LK <dh7lk@...> Description: Repair of DS1742W-120 NVRam/Timekeeper

The following photos have been updated in the Power supply inrush measurements album of the TekScopes@groups.io group. Bridge input current, inverter startup By: Charles <charlesmorris800@...>

Well it finally happened. I managed to kill the EEPROM on my SD-24 sampling head. I'm lucky enough to have a friend who could give me a backup of the EEPROM on his SD-24 sampling head. But I needed to

Hi guys, I just got a Leo Bodnar pulser and need your knowledge on how to use it. When I connect it directly to the scope channel 1 BNC connector, I see 0.96nS risetime. When I connect to channel numb