I bought some cheesy no brand keys and they're useless. The 0.050 (1/20") key just sort of cams around inside the set screw. What brands do you recommend?

Hello, I've read this group off and on for several years. Finally joined. I am a BSEE of ~30yrs and have used Tek gear since technician school in the mid 80s. My first scope I owned is a 1956 type 531

Hi, I have successfully retrofitted the 5S14N sampling plugin with readout for use with the 54xx scopes, by basically recreating the 7S14 readout board and wiring it in, thus creating a 5S14. See the

Hello gentlemen, My first post here, but I've been looking for information on this site for a long while. Some 8 years ago I bought A TDS544A with normal caps issue; that was solved (removed all old c

Down the rabbit hole again... of unobtainium tunnel diodes, that is. I couldn't get my "new" 3T77A to trigger at all. I'm actually not sure if the 3S2/3T77A/561A combo allows internal triggering or no

On 2021-03-07 7:03 a.m., Dave Daniel wrote: > Someone should snap these up. $89 is a good price. > Someone did. (Not me) I wonder if they are all scanned and online? (I know a handful are) --Toby > Da

Just want to bring this to your attention: https://www.ebay.com/itm/Group-of-14-TEKTRONIX-Electronics-Handbooks-1960s-1970s-Vintage-Electronics/313430432838 (Not affiliated!) Seems to be a real bargai

Hi All, My TG501 1ns output died. I suspect it's CR515, the 4V hot carrier diode at the start of the 1ns section. It's just a rare sized barrier Schottky. If I understand the circuit correctly it adds

Hi *, I start this new thread on the new issue seen after fixing the PSU issue from now ended topic: https://groups.io/g/TekScopes/topic/79486087 ;o) Hands back on the 485and starting from some Servic

Does anyone have reference material or procedures to weld an open filament on a CRT? I understand that with the judicious use of a large capacitor and a high voltage, it is possible to weld a filament

The following photos have been uploaded to the Sampling with 3S2 album of the TekScopes@groups.io group. 0306211734-00.jpg 0306211734-01.jpg 0306211736-00.jpg By: Charles <charlesmorris800@...>

Hi, I have a Tek 2335 that reads “OPT A1” on the front panel, next to the serial number. So far I’ve been unable to find anything about this. It’s neither in the 2335 manual, nor the 2336 one. These o

I have a tek 2455b with option 01 dmm and was wondering if there is a front protective cover for this scope.

Hello All I have a 7704A with 2 x timebase: 7B53 and 7B50 The 7B50 has developed a fault suddenly and the screen is now all lighting as green and cannot see the trace anymore when using this timebase

durechenew@... added the album TDS544A with strange display

The following photos have been uploaded to the Sampling with 3S2 album of the TekScopes@groups.io group. DSCF0216.JPG DSCF0217.JPG DSCF0218.JPG DSCF0219.JPG DSCF0221.JPG DSCF0222.JPG DSCF0223.JPG By:

Hi, as the title says my big boy needs a new HV transformer. I've found a similar one PN 120-1348-02 for a reasonable price but i'm not quite sure it will work for my scope. I've also heard that there

TEK Console Port Card interface to Opt. 013 (plug&play) For all TEK TDS 5xx 6xx 7xx Series oscilloscope Homemade interface card for Debugging and add Options. This interface uses Option 013 card for t

Hi All: Yes, there are some threads about beeswax... and many more posts about beeswax, in other threads too... usually about using beeswax in/with transformers. In this tread, I want us to try to get

Though I follow the group postings regularly, I do not do as much “repair on the bare metal” as many of you do. However, I have some vintage equipment (frequency standards) that use discrete transisto