One of my 561's has a severely double-peaking CRT and it's not that bright. Voltages are in spec. It's probably not worth locating and buying a new CRT (especially if the USPS is going to handle the p

So, I am a new member and maybe this topic been discussed before.... I recently was trying to use a 1A1 plugin in my 1956 type 531... Have some issues with it.... Reason for joining. While I was worki

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

Applying special effects to video using analog circuitry, no digital processors required David Sieg - Introduction to the scanimate part 1 https://www.youtube.com/watch?v=UHjkMThH0aE

If anyone's looking for one, there's a new listing for a 1S1 sampling plug-in. https://www.ebay.com/itm/Tektronix-Type-1S1-SAMPLING-UNIT/284211115843

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

Just acquired a working 7M13 but the C and H buttons are broken. The 10-way button assembly doesn't have a Tek part number in the manual, it is just listed as an assembly. Is there any source for it?

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

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

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

I have just refurbished and calibrated my 7603. The frame itself showed 2.5ns rise time and bandwidth was 140MHz. With 7A26 system rise time is 3ns and bandwidth seems to extend to 130MHz. Small dip a

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

Thanks to all for the helpful sweep mod data to make the 3L5 run, it was just what I needed. Now, what I could really use is a test plug in to check the 561/564 frame and power supplies. is there such

While searching Ebay for a GR874 splitter tee, I came across this listing: https://www.ebay.com/itm/Lot-of-4-Tektronix-017-054-017-052-With-General-Radio-GR-874-Connectors/362763553704 I think these a

In 2017, my 547 with Bill Schell HV transformer (installed around 2000) was working. It has sat unused in a dry basement since then. Today, in March 2021, that transformer exhibits the same thermal ru

HI All... Got a Tektronix 2215A. Channel 1 was bad, no signal coming through. Channel 2 fine. Found Q122 Jfet on channel 1 was a J210 part # and bad... already replaced a while back perhaps? should be

When I bought my 3S2 sampling plug-in, it came with a 012-0124-00 Sampling Head Extender (3 ft). Thought that was a nice bonus. Unfortunately some genius seems to have removed the push-on coax connect

Is it possible to upgrade a 370A to 370B by changing the firmware? (except from floppy drive) Any information welcome... thanks, Fred

Hi! im currently fighting with a Tek 2230 that really don't want to come back from the graveyard, i'm posting this hoping that my experience may one day help someone else. So... i've got it from an au

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