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Hi Ke-Fong Lin, for me it's logical to change the PCB rev: something has changed. Maybe the board material has changed too, but I think the point is that the Enhance/Integrate functionality has been

Hi Stefan, Kinda strange they updated the part number of the PCB, yet they have unpopulated parts. Maybe they changed "technology" in the manufacturing of PCBs and made only the minor changes needed

Rogerio O <rodd414@...> updated the album Tek 577 unable to display more than 5 steps ***SOLVED*** ( /g/TekScopes2/album?id=279289 ) : The waveform at TP305 is fine, but when I

PROBLEM SOLVED!!! The culprit was Q234, which was testing as two diodes. I did not realized that the steps should be present at Q310 base, so I never checked this part of the circuit, especially

Hi Ke-Fong Lin, nice photos. The newer A20 BD changed to Rev 4 (670-5369-04). The CRT is still the same. Stefan

The 200 series are all fine, but rare to obtain and expensive to ship. Look at Craig List, and go to local Ham radio flea markets The straps and foot rails are adjustable to fit most Tek portable, we

Thank you for your help, Ozan, I have posted a picture of the signals at Q310 base & collector and Q310 base & emitter on the photo album /g/TekScopes2/album?id=279289. The base

Hi Stefan, Look at the photo directory, I've added a screenshot of the older schematic along with photos. For my restauration, I'll eventually have to buy the SN B040000 manual from Artek Media, but

Ke-Fong Lin, please take a closer look, if some components are not installed in the newer one. (Should be according to newer manual.) The F&I BD is on the left side. I've added a screenshot schematic

On Sun, Oct 23, 2022 at 01:34 PM, Rogerio O wrote: > > Hi folks, > Following Ozan's suggestion I have measured pin7 in on CH1 and pins 5 and > 6 on CH2 and everything went as expected. 0V at pins 5

Hi Stefan, I've actually both a SN B040000 and up newer version, and an older one. They're both non-working and restauration projects. However, I've taken a quick look already, and if I remember

IF Q310 is used as a current amplifier (low impedance input) then the base voltage can be 0.6 volts even if the operating conditions are bad.? Is the base connected to multiple sources through

Hi folks, Following Ozan's suggestion I have measured pin7 in on CH1 and pins 5 and 6 on CH2 and everything went as expected. 0V at pins 5 and 6 while having the staircase signal at pin 7. Then I

I need a scope cart for one of my 465s. I'd like one of the "single rod support" style. Is there a reason to prefer one of the 200 series (K212, 200-1,200-2, etc) over another, or are they all more or

I've managed to source the info I need, special thanks to the member who opened up their unit! :)

Hi all, I am currently looking for copies or scans of the Instrument Interfacing Guide (part no. 070-6759-00) and the Reference Guide (part no. 070-6761-00) for the AFG5101 arbitrary function

The Enhance/Integrate knob + corresponding electronic components (Storage schematic 10) have been removed on later units, SN B040000 and higher. The remaining circuit + CRT was mainly unchanged. Why

Bonjour chère Jennifer, We have met before..am sure you knew our friends in audio....and Tek... Sid S. Dick S. (RIP), Rich C, Bruce H Tomlinson H Sol Marantz Bravo for the Tektronix collection! Fine

Jennifer- Welcome aboard...... and here I thought I had too many...space is the limiting factor.....I am not a collector either but grew up using mostly Tek scopes. Great bunch of folks here. Renée

I like the 7844 and 7104 also. Welcome to a place to ask questions about repair, use of probes, measurement setups, whatever. I have spare scopes untested also. I am not a collector either. I only use