Hi all, As mentioned by Dave, fixing something is better then tossing and buying again. It's also good practice for us problem solvers! On the issue of broken interlocks the wife here used to slam the

Chuck, Please tell me more about the 564B HV transformer epoxy disease! Thanks! Pete On Sunday, January 3, 2021, 8:07:20 a.m. EST, Chuck Harris <cfharris@...> wrote: It is a cute little scope, b

Jean-Paul, Is the 68pf 2Kv cap a ceramic disk cap? Sounds like it is. I can't remember the last I had a leaky disk cap! If there is evidence of dirt, oil, old flux right around the cap, I would clean

Hi all, I agree with 'Sdturne@...' completely! We are lucky in a democracy that equipment can trickle down to ordinary folks at a goodprice or we can buy when most gear is new if that's what we want

Hi all! Heating the shield til you demagnetize it would work, but what about using a AC degausser instead? Turn it on 2 feet away and then bring it close and move it all over the shield, when you've c

Chuck Harris, I agree, but I don't think I've seen anything like extra metal or plastic to duct air thru the scopes. 2 years ago I picked up a MIG welder, and noticed how the diodes would heat and the

Well said Dennis! I can see many of us feel that same way. I'll be quick: The first time I saw a Tek scope was in high school back in '73, only the teacher was allowed to use it, students used mid 60'

If you get to test the 561B, do it. If filter caps are bad inside a 'bent trace' may appear, horse trade a little and repair it.If a buyer was sneaky, twist the horizontal trace position so it goes of

As far as a Tek 561B is concerned, you may want to bargain down the price since it is not a 564 / 564B storage scope version!With the covers off by comparison, the 561B looks empty inside! Storage fun

Hi John, I still have a 564 storage scope on the bench, it's smaller then a 547, etc and there's lots of plug-ins including sampling units! I guess I cornered the market on mint 3L10 SA units too. But

I'll take a 465B over the 465, first it's at least 10 years newer. A nice one usually means it's not been beaten up, plenty of abused ones out there! Sad! I had a scare a while back when all time base

Pre-emptive fix for your 7CT1 plug-in: C30 and C32 axial caps (100 μF, 25 V) are voltage under-ratedand have a tendency to leak or short, causing resistorsR30 and R32 (240 Ω, 0.25W, 5%) to overheat an

Hi all, I started with Tek way back. The 564 had the balance of function and repairability, whereas owning a 7000 scared me at bit at the time. Using a 7000 at work was always the way to go for speed

Lots of good comments on making replacement filter for scopes! I've made a few replacements myself, no big deal. On your vintage scope, check some date codes on parts and see when your scope was actua

Thank god it was not the quality enclosed Bourns pots - I use them all the time! Replace the pot and hopefully you'll be back up and running! I don't trust open frame pots over 1M! Cheers! Pete

Nice one! Back in '78 I was told to tear into a new Tek T912 scope and add wiring to remote control various features thru other equipment! As a youngest guy in the lab I thought they were setting me u

Hi GeorgeP, I'm over in Toronto, Ont., I don't mind driving over for big items. I only saw 5 items on Ebay, can you post a list we could look at? Thanks, Peter

I'd look at the following being a real issue on your 7CT1N: There is an issue where capacitors C30 and C32 canblow/short since they are voltage underrated at 25VDC when they should beover 35VDC causin

David, Sooner or later all of us will dread an accident like that! I'm closer to 60 then you are and I just cut my foot open a bit on the deck near the poolthis weekend - I won't be picking anything T

Hey Brent, If you're looking to find a hot spot due to a load on -50v rail of my R7903, it would depend.on howmuch current it will dump into a near short, etc, before limiting occurs, if the current l