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A friend acquired a J16 but the sensor is, in his words, "toast". Any thoughts on replacing such a beast?

There's no memory in the module but there is a DALLAS DS1742W-150 Timekeeping RAM on the main board in the scope. Does your scope have the latest firmware ? Is the date & time clock working as

Hello Kerry, Can you post some photos with waveforms for 5, 2 and 1 ns ?I have one TG 501 and I don't know if it is in range of specifications.I don't have an oscilloscope with 1 GHz bandwich, but? I

That would be the one I scanned. I took a lot of care to make sure it's clear -- if you find any problems, let me know, I still have the original files and paper manual. --Toby For serious fault

Sounds like an insulation failure in the HV section. With sound, my guess is the wire that brings HV to the CRT. HTH, Dave Wise ________________________________________ Sent: Monday, September 03,

There is a very decent PDF manual at w140.com/tekwiki/wiki/466. For serious fault finding I print off a few pages, sometimes as two sheets stuck together, and make a note on these where to find other

There were four revisions of 154-0644-0x, -00, -04, -05 and -09. Only -00 (< B040600) and -05 (repl for -00 and used from B040600) were used in 7704A. The other two were used by 7854 and 790x series

Hey all, When I turn on my 547, occasionally once the thermal relay clicks on, the fan will slow down more than usual, and I'll hear a loud crackle and hiss and the CRT won't come on. Any ideas what

My TDS3032 (original version) works fine. When I turn it off, it seems to retain its settings except it doesn't remember the GPIB address configured in the I/O Setting. I set it to GPIB Address 2, and

Oh, right. That hadn't occurred to me to be honest. I've removed the 'CRT fuse' as you suggested and run the rest of the scope up to 230VAC without anything going *bang* so that's a plus, anyway.

Hey Kerry, Nice to know that it worked. Such a pity that you had to replace U310. ECL logic ICs are usually very robust and don't seem to fail very often. But definitely, better this than having to

Hello Fabio i replaced U310 (with the help of another Tekscopes member) and this solved the problem. The 20ns, 10 ns and 5ns timing is now correct. I made most of the adjustments in the manual to

The circuitry around the high voltage transformer T1501 constitutes a power oscillator running at around 50kHz, there is feedback from the CRT cathode to Q1472 that controls the drive to the power

Ok Chris, Let me get the scales out and do some weighing! It would be much preferable to send the entire module, as I know it works, and includes the driver power transistors. I have things on over

That’s good to hear Colin, As an aside, the connector will dismantle into the body, sides and the connector pins. However, getting it back together is a right pig’s ear! If your rigid extender is

Dennis Tillman W7PF Aug 30 #150747 Hi Dave, "The internet is rapidly eroding the privacy of individuals everywhere on earth. Each of our members is entitled to the protections of, and governed by,

Many thanks for that; good idea! I'm just a bit bamboozled by the fact that the schematic you mention shows that line from the fuse going to the primary winding of a transformer. If it's +15V unreg as

You have 135th one off the production line. Your deduction on the part number is correct the last two digits are the major rev level. For your scope any revision of the CRT will work.

Gentlemen, I am considering replacing the CRT on an old 7704A that is worn out. According to Sphere, the part number is 154-0644-05, but my mainframe S/N B010136 has a CRT labeled 154-0644-00 Before I

If you remove the fuse in the 15V unregulated supply to the high voltage inverter (z-axis / crt schematic) you remove both the high voltage to the CRT and the CRT filament supply so that should keep