Craig, Yes, there is a lot of garbage on Ebay. This is 100% of my experience. Two months ago I bought there a 1A1 plug-in for my restored 547, and this unit had been abused: the Ch.1 BNC input

WOW! If this "transformation" is what can be done with Tektronix oscilloscopes, then one should never buy one second-hand. Or one can do what I did back then in 1971... build your own. Ernesto

Ross, Well you will find a lot of great scopes and a lot of garbage on Ebay. This seems to be a market place for equipment of all sorts. I personally have 2465B units and accessories available for

Hi Chuck Noob question here. After doing many recappings on LCD monitors and other simple inverters, I have finally got an ESR meter. But I've never actually known what values to look for. How can

Hi Eric, I have limited experience fixing these Tek scopes, but this is what I would do .... assuming that it is the 7603 Linear supply and that your comment "When I disconnect power from the

Hey Rich, congrats on getting the old girl going, glad to help in a small way. Even though these scopes are pretty old and limited, you'll find they're full of tricks compared to your analog

Hi Steve, Understand that probe calibration is supposed to be done at 1KHz, as it is intended to calibrate the DC to AC transition of the probe. The 2445A's calibrator will change its frequency with

Well, I got my 2445A from a guy on eBay who said it had a slow startup which it did sort of I guess the first time I started one of these up? I have no idea if they’re instant on or I presume they

The -12 and +12 vdc was a little les than 1vdc low. No damaged components I can see. I suspect a transistor but will do more troubleshooting and testing. https://i.imgur.com/sGgmFge.jpg Bill

Tony, I don't recommend any of this! If you think this is something you should do, then I have stepped over the line between informing, and encouraging. I didn't intend to do that. -Chuck

This should work on all of the generations of the 2445/2465, but for the 2445/2465 plane models labeled timebase knob. You would have to move a stop in the switch to reveal the 5ns/div position. It

Hi Jan, I hope none of you would do this... but if you do, don't lie about it. It is still a 2445B. Tell your customer, write a description of what you did on the middle shield. I had a long email

I am so happy that nobody faked my 547 scope. So far, all parts on in match exactly what the service manual says. Ernesto

No, Chuck, you are not a dumb engineer, you are a smart engineer!  One of the greatest assets this group has, no less.  Thanks for putting in your thoughts once again.Jim FordSent from my Verizon,

Chuck, Thank you for the explanation. As I said I'm not interested in performing this modification. I just find it interesting from a technical point of view. It's crazy that the seller is getting

Just a minor note on the 2465 (non A or B) fan... Starting with 2465 serial number Β050100, the Siemens fan was replaced with a standard 12V axial fan (Manual Change Info from 9/19/1985). I've had

You misunderstand what Chuck was saying - he was saying that's what the fakers do. He would never countenance that. David

He's the one selling 2445Bs faked up as 2465Bs David

Wow, that seems like a lot of work to sell a fake, especially when you can pick up a 2465 for $250-350. But, the low priced ones need some careful due diligence. Look at the photos. If the seller

Chuck, my Tektronix is 2465 DMM - is this the 2465A version? Can I do what you recommend in step # 2 and 3? Thank you very much for your help.