Hi, Sorry, I have none in my stock. I have 7603s and a 7704. No 7904 stuff. jerry

Hi: It was a bit of a chore because I had to tear it down a good bit further than I otherwise would have. This is because I needed to remove the rear casting on #2 to replace the damaged one on #1.

Hi Jerry, sorry, I can't answer your question at the moment, because I destroyed the hybrid U685 on the vertical ampliefier board by a short circuit during checking the output signal. Do you know,

Hey guys, I wonder if I could use an ECL one shot triggeredfrom a HP 8656B signal generator to get the three pulses needed to finish thecal? It could have a 5, 2, and 1 nS pulse and triggeredfrom

Thanks for the reply Victor. Ok then, any way to center the focus knob? Seems both my 2430 and 2445A come into focus right about 2 o'clock on the potentiometer. Just curious if this was

Hi, I forgot to ask if the signal on the vertical plates swing positive above zero. jerry

Hi, You might check continuity of the lead. If the lead is good, I would suspect the CRT itself. You can often inspect the internal leads through the glass. Sometimes the internal glass rods that

Tek has the 2440 SM on its site: http://www2.tek.com/cmswpt/madetails.lotr?ct=MA&cs=msv&ci=15047&lc=EN You really need the SM for the 2432, it's very different from the 2440 and even the 2432A. If

The CCDs are the crucial Fast In Slow Out portion of the main sampling circuit and yes CCD does stand for charge coupled device. The PA failure points to the Pre-Amp, but is often a secondary result

Hi Jayw, Thanks for your response.. I know tek used hybrids in alot of scopes, what part of the ckt are these CCD's used in, and what does the CCD stand for, charge coupled device? Thanks, Ryan

Checking the vertical plates are connected inside the CRT is easy - check ohms from vertical plate input pin on CRT to the corresponding pin for the terminator. Also of course check that the

This sounds like the same issue I have with my 7704A. Just curious; can you move the trace above the center line when you activate the beam finder button? Glenn

Before you condemn the CRT (or the vertical output amp) check the values on the large emitter resistors R724, R725. They should be 500 ohms (early 7904) or 332R in the later (post B260000) version.

But the + wire from the horizontal main amplifier is plugged on the contact on the CRT neck, or do you think inside the crt?

Hi Gerald, Whenever problems of this sort appear on Tekscopes, I search the archives for additional information about the problems if they are of interest to me. A search of the archives for "test 05

Hi, Sounds like the horizontal + pin on the neck of the crt is open. jerry

Hi Gerald I've done a couple of 2465B rebuilds. The best capacitors (IMHO) for this application are Panasonic EB's. They are my first choice for about 90% of the replacement caps on the 2465B.

In my 7904 the readout is placed 1 division below the middle of the screen. Additionally the vertical signal can't be moved to upper half of the screen. When I move the vertical signal from bottom of

Hello Stan, You said "Theslewed edge consists of a series of very accurately > spaced "edges",space accurately "in time" from the CG551AP Trigger Output > pulse. Ascope display of it will consist

Hi Ryan, These scopes had a high failure rate in the CCD hybrids. It is likely that on or both are defective. You can determine which using the extended service diagnostics. (Or looking at their