According to the service manual, +55, +15, +5, -8. (The original fan motor is thermally controlled from the +15V supply.) > > >

Nice. Sounds like you've got a good one. :-) Ed

My 2213A would show ripple on my workbench with the case off. I discovered it was nothing but the fluorescent shop light I was using, I did all kinds of things to track down that ripple. I turned off

One more thought about your ripple on the lower voltage settings... are you putting the perforated metal cage back on the power supply section before you check to see how much ripple there is? Without

I have a 2215A I have been working from time to time that I'm going to give to a friend who works on magnetos used in some forms of motor racing. It was a scope with many-many problems that now works

Yes, all good information. I have a 2213 I bought in 1980. It is still used. I did get dirty horizontal sweep size potentiometer inside on the board. I used deoxit and it is still working years later.

I am guessing there is a 12 volt supply in the 465. A low volume computer fan sounds like a simple solution.

Yes! Those are the only three of concern in the common 22xx scopes as far as I know. (Where I live the 2213 and 2215 are not common, and not included in my definition of common 22xx scopes) I doubt

Yeah, pet peave of mine: not being able to see voltage and current for all supplies simultaneously.  All power supplies should have this ability. Jim F Sent from my Verizon, Samsung Galaxy

FYI, I have just uploaded the schematics for the Tek 2782 spectrum analyzer to KO4BB. It may be awhile until they are posted. These are scans from the 11"X17" set I have, sorry I don't have anything

Tom, these would be C900 0.15uF, and C902/C903 0.0022uF correct? And I thought explosive Rifa caps where only limited to the 2465x scopes.

Without changing those small tubular caps, by any chance do you remember if your traces where still showing any ripple (not thermal noise) on the lower 2-10mV ranges? As is mine are still showing

On Thu, Jan 3, 2019 at 05:01 PM, tom jobe wrote: -snip- > I saw where someone asked if all of your discussion applies to the > 2215... which it may very well do... but the 2213 and 2215 are very >

Sorry, one typo: The FET has number Q920.

Hi all, for nostalgic reasons I wanted a 475A, just because it was the very first scope I ever touched in 1979. My mentor at my first job made sure I would understood what a scope was, so he made me

The issue you list about the transformer is for the 2213 and 2215 which are very different scopes (as hard as that might be to believe) and does not apply to your 2213A Look in the TekScopes group

Hey that's great, I'm doing the same for a 465! How did you access the pots for lubing?

Here are the photos: https://groups.io/g/TekScopes/album?id=81158 It would also appear that the delay line is fully soldered to the board?

The current line is the DeoxIT F-Series: https://caig.com/fader-f-series/ Dale H. Cook, GR/HP/Tek Collector, Roanoke/Lynchburg, VA https://plymouthcolony.net/starcity/radios/index.html

The attenuator and timebase cam switches should be cleaned with little strips of bond paper soaked in isopropyl. That's a very fussy job, but I wouldn't use anything else on them. The service manual