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ElectroTanya is free. It's been up for a long time (relative to the age of the Internet.) The indexing is not always that good. (Sometimes searches turn up mis-labeled manuals, or parts of manuals. I

Metal film resisters do have an inductive property to them and act strange at higher frequencies. And are helical cut so from a construction standpoint would be a resister with inductive properties or

A couple other options to possibly consider: The Tektronix AM700. A real, dedicated audio test system. Anything with XLR connectors says "audio" and lets you interface balanced or un-balanced hi-Z or

Today I removed the variable capacitor, disassembled it, cleaned it (including ultrasonic cleaner with isopropyl alcohol to remove all the old flux etc) then reassembled with new grease and a tiny bit

Oops -- never mind. Responding to a thread that's almost as old as COVID. (Sorted by subject, which ...) -- Prof. Thomas H. Lee Allen Ctr., Rm. 205 350 Jane Stanford Way Stanford University Stanford,

Hi Rich, Not a hijack at all -- you properly changed the subject heading, so you're good. :) If the 555 is getting the proper supply voltage (measure that at the chip), then there are very few things

First, what Ed said. :) Second, you're looking for leakage on the board, but you won't find it there, so don't tear things apart in a hunt for what is a ghost. The leakage is coming from the

Hi Roman If despite Eds argument you need to fix the switches. There is a document here https://w140.com/tekwiki/wiki/Pushbutton_switches that explains how to open the switches and clean them. I do

Don't worry about it too much. Any input amplifier of any system needs to have a certain DC input bias current for operation. It may be very small, but won't be zero, or constant, over operating

I have a pair of DM501As that I use as my every day go-to DMMs on my bench. They work well. I have noticed, though, that with an open input on the 200mV range, one reads about +11mV, and the other

Hi David, Did you ever resolve this issue? I'm observing something similar, though I can't see any signal in DC or AC coupling. I'm trying to determine if the AM503B or A6302 is at fault (or both).

I had never seen this unit until I “googled” it, however if you google this phrase “ Scientific Atlanta 4647 IF noise tester document” I found ATE Corp.,they rented this unit to customers,

We used TEK PG506 and,TM501. The Leo Bodnar 40 ps pulser is only ?49 and very useful. Perhaps someone nearby has the TEK,CAL plug-ins ? Jon

The traces are no signal, input open-circuit, with attenuator x1 and 1mV/div, i.e. worst case. I was just showing how much the transformer’s magnetic field affected the plugin. “Transformer power

Thanks to everyone who responded, both in this thread and privately. I am now suffering from the paradox of choice, which is fine: it gives me good subjects for research while I sock away money for

Dave, I've been looking at the pictures in the album you created ("Type W Plugin 8416-to-6DJ8 Conversion" here /g/TekScopes/album?id=261883) and I'm wondering about the three pictures

I'm located in a suburb of the Minneapolis/St. Paul area of Minnesota.

The fast edge low-aberration. This means a 1ns or better edge with good settling at the transition, no ringing or other issues this is usually a cal source or a tunnel diode pulser to speed up the

Square wave, 0.5 VPP, from ground to +0.5 volts at 1 kHz. Where are you located? Maybe someone close has the cal generator. Regards, Tom in MD? WA3PZI

I'm trying to calibrate my 2465 but don't have the Tektronix calibration equipment. For the CAL 01 Horizontal adjustments, I used square waves from my Hantek oscilloscope/multimeter/waveform