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Bonjour à tous Great topic, and as Dr Lee mentioned, historical links. We must deal separately the noise of the input signal vs internals noise of the amplifier opamp, resistors, etc. There is also

Other time bombs: there are study cases made for transporting gear. Typically they have an aluminum extrusion frame with plywood panels that have been laminated with Kydex plastic sheet, and those

Hi, "You cannot control what you do not measure" is how I introduce negative feedback to my freshmen. An example that they all seem to get right away is a thermostat. I go from there to explaining how

The following photos have been updated in the Sampling with 3S2 ( /g/TekScopes/album?id=261250 ) album of the [email protected] group. * GR oscillator display with Russian D42

I should do the recapping of my Tektronix 2465 (not A / B), I found on this group the list produced by Menahem Yachad of CondorAudio but from Mouser (Italy) there are some parts not available. Since I

OK, had a chance to play with it. In a word, performance is improved but still not perfect. After reconnecting the 300 ohm fixed resistor and readjusting R44 (the bias for this TD), I can now get a

I can't access B sweep without taking the case off so I don't know the exact shape but it should look similar to A sweep. A sweep maxes out at 10ns/div, B sweep can go 2ns/div (then there is a 2x

EDIT: U9028 should be U902A/B Dave

These look fine. Logic selects B sweep is selected in 5/2/1n mode. I was hoping this would be it but no smoking gun yet. Ozan

Hi all, I'm trying to explain to people at my company (none of whom are EEs or statisticians) how negative feedback works in a system. That's one thing that I'm trying to get across, and I can't come

Back to 3T77A tunnel diodes :) It took six full weeks (Feb. 11 order, until today Mar. 22), between the Russian and the US postal services, but I finally got a "Pellet" 1I308J (20 ma Ge TD). It

One more question, the A sweep is triangular but the B sweep has a flat top and becoming almost square, that doesn't look right? wrote:

OK I replaced Q913 and Q923 and I'm using an external supply of 45V I have isolated W984, W987, W989, W972, and W991 W972 reads 35V W984 reads 95V W987 reads 8.5V W989 reads -8.5 but W991 is showing

If it works like the FG 502 (making an assumption) that is the heart of the unit everything is derived from the triangle wave. If there is any setting where the triangle wave is not running that is

I would definitely keep the original GR connectors, and if you need to, use an SMA adapter. They're made by GR too and it doesn't have any effect that I can see on my ~ 650 ps (so far) avalanche

Yea that is why I only changed the normal connector as it only has a wire to it. I did not mess with the fast rise and fall either. Eric

For those who haven’t seen this, this is how the GR874 connectors are mounted directly on the Fast Rise and Fast Fall outputs of the Type 106. I definitely DO NOT want to mess with that!

Ken, I think you are right. This is definitely an early production unit. Although to me, it looks like it might be a transition unit. The reason being that it does have the screw on the front panel to

I can see I haven't read your question correctly. I can see -3.6 when 521 is selected, -3. 7 when B is selected and -5.3 when there is A selected and outside of the 521 range wrote:

Triangle generator is stand alone, doesn't need anything else to work. I try to put all the relevant information in the post, sometimes I may miss somethings. Triangle generator starts (and works