my new scope (Tektronix 326)

[Maxlor]

Today I received my new scope. Well, actually it's rather old, it came out in 1972. After a bit of fiddling, I managed to get a picture on the screen, something I can't really do with the DSO because its X-Y mode sucks:



Back then, it was called an "ultraportable" at a mere 5kg, and as you can see, its front is tiny, smaller than many multimeters. That screen is only 3.5"!. It is however 38cm deep. The diminutive (for an analog scope) size was the reason I got it; I've been lamenting getting an analog scope, but frankly I don't have the space for a big one. This seemed like a good fit. The probe connectors are on the left side btw.

It doesn't have a lot of bandwidth (only 10MHz), and there seem to be only very few controls, but all the basics are there, different trigger modes, chopped/alt beam modes, obviously an X-Y mode with blanking (and the X axis is actually on a separate channel, so you could display two separate images using the two Y channels. I don't know if all analog scopes have that.) The controls you don't need all the time like trace rotation are on the inside, in the form of many trimpots, most of them on the bottom of the unit:

(higher res pics here: http://w140.com/tekwiki/wiki/326)

And as you can see from the top image, the unit is packed! It seems to me they tried hard to make it as small as possible, so there's next to no free room left inside the case. There are several boards stacked on top of each other, visible through the cracks:



So... this unit is probably around 40 years old now. And everything still seems to work perfectly. I had a quick look inside my unit, didn't see any corrosion. At this rate it'll do another 40 years easily! I doubt the other, plasticy scope will last half as long

Anyway, just needed to share my joy, I'm done now 

[Rigby]

Very nice. 

[PaulAm]

Even though the bandwidth is only spec'd at 10 MHz, that's just the point where the vertical gain is 3db down.  It's usable to see a signal at much higher frequencies.  I have a 422 which is spec'd at 15 MHz, but it will trigger and display at 50 MHz although the vertical response is getting pretty bad at that point.

That's a nice little basic scope.

[w2aew]

Today I received my new scope. Well, actually it's rather old, it came out in 1972. After a bit of fiddling, I managed to get a picture on the screen, something I can't really do with the DSO because its X-Y mode sucks:



Back then, it was called an "ultraportable" at a mere 5kg, and as you can see, its front is tiny, smaller than many multimeters. That screen is only 3.5"!. It is however 38cm deep. The diminutive (for an analog scope) size was the reason I got it; I've been lamenting getting an analog scope, but frankly I don't have the space for a big one. This seemed like a good fit. The probe connectors are on the left side btw.

It doesn't have a lot of bandwidth (only 10MHz), and there seem to be only very few controls, but all the basics are there, different trigger modes, chopped/alt beam modes, obviously an X-Y mode with blanking (and the X axis is actually on a separate channel, so you could display two separate images using the two Y channels. I don't know if all analog scopes have that.) The controls you don't need all the time like trace rotation are on the inside, in the form of many trimpots, most of them on the bottom of the unit:

(higher res pics here: http://w140.com/tekwiki/wiki/326)

And as you can see from the top image, the unit is packed! It seems to me they tried hard to make it as small as possible, so there's next to no free room left inside the case. There are several boards stacked on top of each other, visible through the cracks:



So... this unit is probably around 40 years old now. And everything still seems to work perfectly. I had a quick look inside my unit, didn't see any corrosion. At this rate it'll do another 40 years easily! I doubt the other, plasticy scope will last half as long

Anyway, just needed to share my joy, I'm done now 

Congrats on the nice little scope, and good job on the XYZ mode graphic.  Many people have forgotten at the old classic Tek application note called "XYZs of using a scope" is named this way because a CRT is driven with X, Y and Z-axis inputs.

[c4757p]

What a cute little guy.

(and the X axis is actually on a separate channel, so you could display two separate images using the two Y channels. I don't know if all analog scopes have that.)

No. My Tek 2445A was the first one I've had that did that (sort of - Ch 1 was X, but it's a four-channel and you can display as many channels as you like)

[pomonabill221]

Typical Tek stuff... gorgeous!  Congrats on the scope!