Jeff, the resistors connected end to end are an attempt to make a required resistance that was not available as a standard resistor value. Shortage of parts? Engineering change? Select in test? Who kn

I found a small stash of older memory parts, all safely anti-static stored: MK4516N-15 (8) MCM4164BP15 (16) AM9101PC/P2101-2 (2) MBM2147E (1) SMJ4016-20JDM (8) Free to anybody that can use them. Also

My service manual for the Ballantine 1032A scope got lost; hoping someone here might have an electronic copy or could point me to a resource other than a $100 online manual vendor. Thanks, Michael

I'm selling a Tektronix MDO4104-6 4 Channel 1GHz Mixed Domain Oscilloscope, it also has 9kHz-6GHz RF optional input, the machine is in excellent condition. Frequency Range: 1GHz Number of Channels: 4

This is the magical device that changes some of Tek's monochrome CRT displays to color (Logic Analyzer, 5K scope, etc.) by time multiplexing the display through different color filters. Clever trick.

Dear all, I bought a Tek 2465BCT at Ebay. The scope was damaged during shipping and two control knobs had their shafts broken. While opening the unit to replace the pots, I used the opportunity to tak

Dear All, After fixing the A5 board of the scope which was damaged due to capacitor leakage I have started to try to calibrate the scope. I managed to adjust DAC REF without any issues and moved to CA

Rogerio O added the album Tek 2465BCT CAL01 weird behavior.: This are photos and movies of what I get when trying to execute CAL01 routine.

All- I am doing a bit of fall cleaning and have several hundred (10 lbs.) vintage Tek ceramic terminal strips and plastic inserts. I only need a few of them. The rest of the terminals need to go to a

Hi all. I'm currently restoring my DM502 Digital Multimeter and am looking for a few parts. Specifically, I need the 'dB' and 'INT' push button caps (with writing in good condition) and hopefully mayb

Hi folks, I was working on a 7T11 --> 7T11A mod for my recently acquired 7854. Got some intelligible traces @ 100kHz (albeit dotty) on the 7854 in SCOPE mode. However after trying these and a 7A24/7b9

While pulling apart this 465 parts scope I tried removing the pushrods from the Horizontal Display switch on the A7 board. Working on the bottom "B DLY'D" pushrod the push button came out of the switc

Have been searching but have not found the latest version of Firmware for TDS540A. Does anyone have an idea? Thank You Luca

tekscopegroup@... wrote on 11/30/2020 12:28 PM: > I recall walking Canal Street in lower Manhattan in 1976 during a vacation trip with my parents. <snip> Hello-- Sometime in the early 1960 , my roomma

The following photos have been uploaded to the 70ies electronics... electromechanical computer ? album of the TekScopes@groups.io group. P1200918 (07.07.2019 - 12h43).jpg P1200919 (07.07.2019 - 12h44)

Harvey White wrote... "See if you can find the SF novel "Venus Equilateral" by George O. Smith. Pay attention to the electronics and computing part if you would, which shows (amongst other things) mec

These are likely to be leaky from C to E as a diode while checking normal as an NPN. An hfe meter will show way off hfe on the leaky ones. If they have round leads (tarnished above the socket), they a

Hello, I live about 2 miles from Fair radio. I know the owner Phil, not a close friend though. I am not sure what will happen when he retires.... I do not know if the show room is open to the public a

All: I am working on a 468 Scope. All voltages are within parameters both the main and digital power supply sections. I have tested the analog section, bypassing the Digital section. Analog seems to w

Dear all, I have read somewhere on this forum what is necessary to do in order to store the calibration constants without finishing all the calibration steps. However I have spent more that an hour se