I had a similar problem on an early 7k prototype mainframe Vert Mode Select switch. I could not find loose replacement parts. *******WARNING********** Collectors and instrument restorers should not

Congratulations!!!

Hello Holger, From what I have learned, the Gotek emulators are all similar but have different firmware.  The TDS3000 series use a 26 pin interface, so the cable is a bit different from the

Really, the answer is yes. The new CRT will certainly have different gain for its deflection plates, its control grid will have a different curve to match. The geometry plates will be a little

Just what I'm after, unfortunately about 3,000 miles away from me.

I've just acquired a 7854 scope for a nice price; the 7B15 timebase module that was included has a pushed-in switch (S90) which I have found to be due to a broken plastic catch that should be holding

Thanks Dennis and Ke-Fong, I have ordered and will attempt this repair next week. EJP

The replacement CRT arrived yesterday afternoon, so I promptly sequestered myself out in my unheated shop (in a drafty barn) in 30 degree weather to swap in the new tube. Before I could even think of

7B50 primarily working. there is a problem with the readout at sweeps 5uS and faster, reads 1000x faster that is 5uS reads as 5nS amnd 50nS reads as 50pS. 7B50a again primarily working, the display

The Tube in my 576 displayed a similar behavior. Though no read out on the 576. It was confirmed by others here as a high hour / weak tube.

Was purfectly working scope until the delayed sweep switch broke internally. The friction part just broke off. There is a post somewhere how to fix it. No time to do it and got a new one

Hi! I've added a Gotek Floppy Emulator to my 420A a while ago. A short description of the process can be found on Tekwiki: http://w140.com/tekwiki/wiki/TDS420 The exact model number of the

Hello Dennis, Thank you for replying but ... I cannot find an attachment :-) Perhaps the "system" stripped it? What was the format of the file? Cheers, Rick

On-topic:  My own experience with 720K 3.5 inch disks is entirely with a Toshiba T1000 laptop computer (running DOS 2.x) that I think I purchased around 1988.  The T1000 had/has a single 720K 3.5

Really both the Readout and the Display intensities are weak. With the Display, that is, the sweeping trace, it is quite readable in normal light but maxes out at merely "readable"; as for the

Hi Rick, Attached is my list. Dennis Tillman W7pF

I have been more or less following this thread, because I am a big fan of these 24xx scopes, but I am a bit puzzled by the title of the thread: Is it just the readout that is weak, or are the traces

I would consider increasing the heater voltage as a test, and only as a test.  It does risk destroying the tube completely but it usually does increase electron output and can brighten a CRT.  So if

David, This may not be that illuminating, but my memory from the time these disks were in daily use was that there were drive differences as well as disk differences and that it was not at all

https://www.ebay.com/itm/GOTEK-26-Pins-1-44Mb-Floppy-To-USB-Disk-Emulators-For-Barudan-Embroidery-Machine/254448239852?hash=item3b3e4c04ec:g:knMAAOSwG5td7hXh ???? I wonder if this will work with