Hi to everyone, my name is Henryk Majewski from Australia. I joined Tekscope a few days ago. I have 7Ct1N plug-in. I build adapter some time ago and it works fine except for some transistors and some

Thank you for replies. I have ordered some ferrite beads from Ebay as well I ordered precision cap/inductance meter LC100A. It has very good right ups on the net. It allows zeroing; very handy when bu

I just rebuild Vertical Current/Div dial knob on 177 fixture. I am having problem to position it correctly. If I turn the knob counterclockwise until stops, what the yellow pointer on the plastic dial

My knob completely disintegrated. What left was the dial and aluminium insert with small pieces of plastic still stack to it. I was lucky enough to buy some Tektronix knobs from Deanne Kidd some years

I received my 577 Curve Tracer last week. Very impressed, very nice instrument. When I was bringing it up with auto-transformer tantalum cap in -30V PSU started to sizzle. Later, I found two suspect h

I followed the advice and the error was consistent. Vertically displayed signal was halved. I found Q628 in complimentary pair in 177 fixture to be faulty. Unfortunately when I proceeded with calibrat

I followed the advice and the error was consistent. Vertically displayed signal was halved. I found Q628 in complimentary pair in 177 fixture to be faulty. Unfortunately when I proceeded with calibrat

I followed the advice and the error was consistent. Vertically displayed signal was halved. I found Q628 in complimentary pair in 177 fixture to be faulty. Unfortunately when I proceeded with calibrat

I am looking for 7K extender too, possibly 3 sets. John Griessen's production board looks very neat. @ John Griessen Do you sell them? Do you sell them as a kit including edge connector? Henryk

I second everything what has been said about removing caps and cleaning. The only thing I would add; after scrubbing the boards with soapy water, followed by alcohol and drying in the sun or in the ov

I acquired DC508 counter Opt1. It works fine from direct input but 75-1GHz input is not connected to the circuit. I couldn't find DC508 1GHz manual. I downloaded DC508A 1.3GHZ instead. The DC508A appe

Thank you for all replies. It confirms what I suspected. I am missing the prescaler board. Henryk

I found Q862 to be faulty in fast rise section of PG-506 generator. PG-506 manual asks for Tektronix part 151-0525-00 and further is referencing to S39291. In Cross reference Tektronix manual I found

Thank you for replies and my apology for the typo. Henryk

I would like to draw attention to some possible nasty problem with 577 Curve Tracer. Since I bought mine a few months ago, very intermittently, I could hear arcing noise somewhere at the back of the u

No, R754 didn't shorted through. Part of the resistor touching -30V trace burnt. Its resistance decreased. I think it changed to about 150k.

This is "Christmas tree" oscilloscope. On the back it says Option 5 - Video trigger. The front panel is off 24x5a. I would pass on that one unless one have a lot of 24x5B spares. Option's 5 front pane

It would be interesting to know how members go about and keep in check accuracy of their workshop multimeters. I have 5 multimeters and each is giving slightly different results. It would be nice to c

Thank you for sharing all the info regarding multimeters and voltage references. For handheld meter I had my trusty Fluke 75 since eighties. Great meter and the battery last forever. It slightly disag

What you can do, you can dissect your faulty DS1225AD. Just remember DS1225AD is using dual battery DS1210 non volatile controller. What that mean you must get to pin 2 of DS1210 instead of pin 7 of D