开云体育

One of my favorite scopes (the venerable 7603) had some intermittent issues with the on-screen readout for some time. Usually I could encourage it to work by pushing the plugin in firmly or applying a

Sorry Eric, doesn't apply to what you did... Raymond

At 0.5V, it's 1 ns max. Raymond

Now Raymond has me thinking I might need to check the rise time when I get back in to the lab tonight on mine make sure my BNC jack did not roll it off to far. I did the mod because the GR to BNC

Stephen wrote: Yes, I'd say at least twice the diameter. There's not much space on the face of the DC505, so I don't think I could reasonably replace the SMB connectors with SMA connectors. Even if I

Hi to All, Early Type 519's have Nickel Plated GR874 Outer Connectors. I had one of these. Later Type 519's have Gold Plated ones. This change is described in the latest Manuals. Greetings, Egge Siert

I already have a 184, which I actually just recapped after it started acting very funny. (A little parentheses on this. It turns out both the 700uF and the 2000uF read 0 on the cap meter! The 700uF

Good progress. 485 uses B sweep generator for 5/2/1ns settings even in A sweep setting. Since you are seeing functional 5/2/1ns in B sweep it is a problem of scope not selecting B sweep in 5/2/1ns

I was actually thinking of leaving it alone, if not for the reflection issues, at least from a historical perspective. I’d like to find good GR874 to BNC connectors, preferably in Europe

For everyone who was interested in these crystals I LOST YOUR INFO. I need your mailing address so I can send these out to you. The price will be $10 per crystal. If you want an extra one, and I have

Ahhh, that should be 170 - 180 ps, of course. Raymond

Just FYI: You don't *need* high-voltage to drive a tunnel diode (TD) of course. It's Tek's TD pulser that is dimensioned to be fed from a relatively high voltage. In it, relatively large resistors

I have a 6 foot P6011 1X probe I do not need. It works fine and it is in good mechanical and cosmetic condition. For more info on this probe see https://w140.com/tekwiki/wiki/P6011 It has a ground

Thanks for that further explanation, Albert. The 240mA max is written on the front plate, with the 120V max. Raymond

Experience will teach you that 120V into 50 Ohm is unlikely, if even only for the reason I mentioned earlier (> 140W output) and that use as a high-amplitude generator is possible with lesser loads,

In this case, the loaded output is not (50/650)*120 V. The fast rise holds for the edge from negative to GND where the output tubes are cut-off. Only then the output impedance is 600R. The amplitude

The PG506 some times will not have enough drive current to trip the tunnel diode in the pulser, It can be hit and miss especially with the ageing of the pulser diodes I have not had any issues with

Hi Martin, DON'T TRY THIS WITH YOUR SC502: When I was 12 or 13 I got my first Volt Ohm Meter (VOM). I used it to measure every battery and my skin resistance and anything that I could find. Eventually

You do need very good BNC (cables, connectors, constant contact surfaces) to get even close to that. Even good quality BNC tends to be visibly inferior above 500 - 800 MHz. I'd rather leave GR874 on

Thank you for the explanation.