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Whaw Daniel, a nice lecture for new tube scope owners! Albert

HiSorry, I thought I had posted an image. I've added one to the albums: https://groups.yahoo.com/neo/groups/TekScopes/photos/albums/816692027 Unlike the 2221 and 2230 the 2220 doesn't have on screen

Its troubling that the scope ma have been dropped so hard.? Double check the CRT.? If all channels show similar distortion you may have a CRT fault.? Its repairable though. To:

Got a chance to open up the 2465B tonight. Pretty clean and no obvious signs of capacitor issues (leakage, etc.). It's a 65K serial number and appears to have been made in 1994. Fan is broken. Two of

p.s. ?Oh, and the glow you reported on the CRT when the beam is all the way to one side of the sweep appears to be normal. ?The beam is either hitting the side of the phosphor or perhaps the

Hi Alex, ? I am back from vacation now, catching up at work, so I still don't have too much time to reply, but nevertheless read through all your messages. ?Also there is nothing like having a copy

Bad voltages on certain supply rails can also cause the trace to distort as it is moved top to bottom.? One concern is if the distortion is the same on all channels and at the same place on the

Depending on the history of your scope, the U400 pins may be corroded and make it hard to remove.? This isn't common nor likely, just possible.? So voe the screws that hold it in place and pry

It is a way to make a common cathode driver with all NPN transistors. I do not know why emitter followers with a 4.1 volt output minimum would have not worked though.

I would not hesitate to buy?a 2465B with a trace for under $100. Once home with this reassure I would measure all voltages and most likely replace all electrolytics.? Then borrow a U400 from my

I figured it out with NPNs in series with segment drivers A and D so the voltage drop would be insignificant; N-channel power MOSFETs would work also and a full 5 volts are available for enhancement.

Hi, thank you for this long post. In fact even if I think that if it may be done in your way, it will be difficult to have the same segment luminosity. May be it's less work to use a microcontroler

Hi, You do mean an "X" or a cross? "+" ? A cross hairs pattern is part of the calibration, (Clock delay timer). If you power up the scope, then do a reset, (using plug P9104 near the microprocessor),

How "good" is the "X" display? Is it like a distorted Lissajous, or accurately formed? Can you move it around with the position controls? If it's well-made, and fixed at the center, then it's likely

I bought the 2465B today. Nice physical condition on the outside but haven't had time to open it yet. Seems there's a bit of noise on some channels. I'm guessing power supply issues. Changing the

Thanks for your comments.It happens in analog mode. After power on, the display comes up normally for about a second then the X comes up. Occasionally the scope will start up as normal, the problem is

david.partridge@... [TekScopes] <TekScopes@...> wrote: ?It's everything else. Malcolm? [Non-text portions of this message have been removed]

I thought some of you might be interested in these - my wife would kill me if I adopted a bunch of oscilloscopes so close to our anniversay! The state of Illinois surplus auction in Springfield IL has

Hello-- My thanks go to everyone who inquired.

Just to clarify is that the entire Bee Documentation or everything except the Tek and HP stuff?