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Hi Harvey, Are your disassemblers available somewhere? I've been using this one for the 6800: http://www.seanriddle.com/willy3.html#dats It can be explicitly told where data sections, routines,

Thanks for the link & the information. I have found another which hopefully is in much better condition. I'll keep this one in mind as a possible backup. John

Looks like the 7104 has 10 Gsamples/second, while the 5104 has 5 Gsamples/second. May be the only difference. Harvey

Hi Team Tek - I am considering upgrading my scope. There are a bunch of TDS5104s and TDS7104s on Ebay, and other than the OS, I can't see any difference in their specs. Does anyone know how these two

Thanks Dennis, For the heads up and for the kind offer... I think I`m covered, with the 10 x NEC EB2 relays I got, and the 2 OMRONs G5V-1. What puzzled me more (until I gave up on the Tek ones) was

....and it appears that the lower fan isolation mount has turned to goo and melted, so the fan is not straight and is probably rubbing against the grille.? ?Or it was dropped, and the fan motor's

Here is a link. The asking price is out off wack. https://www.ebay.com/itm/Tektronix-Type-551-Oscilloscope-Power-Supply-Parts-or-Repair-READ/302769747661?hash=item467e7bb6cd Jerry W2JI

Fortunately I have the cable. Thank you for the lead but an ebay search using various combinations of Tektronix, 551 and power supply failed to bring anything up. Would you have a link to

Ah, ok. They wanted money for that. Mine works the same way (all the disassemblers that I w

I've measured the +1.36/-1.25V test points today with two Agilent 34401A. So, the results are the following: On the working o-scope the points are stable with a time (4 digits after the decimal point

Dallas/Maxim made a few variants of the 1225. The notable themes are: 1) Speed, which is unimportant. 2) Temperature range, which is also probably unimportant to you. 3) Voltage tolerance, which is

Just to confirm, a compatible NVRAM replacement for the 2467B (DS1225Y) is DS1225AD-150+? Thanks Jude

Thank you Siggi. I had no time to re-measure the test points, I'll do it today. But now DAC is centered (pin 13 J119) between -1.250V and 1.250V, which is quite amazing. I hope that the results will

Harvey, I used IDA (Interactive DisAssembler created by Ilfak Guilfanov. There is a Wiki page), you can see the section of photos in this thread for the screen capture. it's a semi-automated

Any idea which ones were the TEK ones? I'm primarily interested in the TM500, 468, and not sure about any other ones. Disassembling the DM5010 indicates to me disorganized, but mostly assembly

On Wed, Oct 17, 2018 at 07:16 PM, <skv1958@...> wrote: While trying to figure out what is going on with my 468 I decided to monitor the -8V and 15V supply DC coupled. When the trace starts to

Just loud thinking...when jitter starts in some circuit, sudden current draw changes may cause sudden voltage changes, which may appear as noise. What are the amplitudes of these noises on power

Congradulations.

And more... Both Tek and HP used Smalltalk embedded in test instruments. Plus Tek also produced Smalltalk workstations.

Awesome, congratulations! This has been one of the more epic repair threads I've seen here recently, it was fun to see some of the firmware disassembled. Super-fun to see the firmware matched my