I'd suggest that you don't worry about it. There will be some fixed holder capacitance due to the package, but the rest is non-linear, and depends on bias voltage and circuit conditions. If there are

I see what you mean. Yes 20ps is really fast. I am sure that is usefull for some cases. The 33120A can never do that. I checked what the 33120A could do with my SC504 scope, which is 80mHz.

Thanks for the suggestions everyone, I will start with cleaning the soot. The D2 is the non-storage. The front-panel intensity pot is very linear, delivering -30..30V to the HV board. But the

The main feature of the Tektronix 067-1338-0x is the step rise time of under 20ps. The 33120A arbitrary waveform generator is much, much slower. --John Gord

I used an Agilent 33120A arbitrary waveform generator instead if a time mark generator. It costs less, and you can use it for many other things too. I don't know of there are any important

I have a bunch of russian tunnel diodes, I want to test his capacitance. Any suggestion? I have a working 7S12 reflectometer, a 7s14, a 500Mhz TDS 5054 scope, a nanovna V2 +, a waynekerr 6425 bridge

Hi Tom Yes, the output tunnel diode was "working", but it haves >100 ohms resistance Arm diode is ok, but is diferent kind, is a 10pf, de output is a <5pff When I first tested operation I don´t

Thanks Chris for the correction. I went and took a look at my supply of Novus and it was the #2 that I used, just for confirmation. Tom

Now the cat’s out of the bag!

If the intensity low-high-low thing persists after you clean the soot off, you may have a weak tube. I assume this is as you move the intensity control clockwise. Look for a 5110 scope, they have the

Is this the storage version? I always forget which is which. If it's the storage type, you should always do troubleshooting first in non-store, where things are less complicated. The occasional

I would guess that this contains one of the TDR generator hybrids used in the SD-24. The same hybrid is used as the (very fast) calibrator on some Tek sampling scope mainframes. I bought a "parts"

In regards to C3150, Tek used a 1000pF, 1%, dipped silver mica. I don't know if they did that because of wanting to hold a tighter tolerance or better temperature compensation (or both). Since R3150

Gary, Clean the black soot out of everywhere. You will likely have to remove the tube because of the good chance it is also dirty on the tube, socket and inside the shield. The flashing could be the

I've been trying to restore a 577 D2 that had several problems. The previous owner(s) hacked up the -12V supply and the regulator was floating, unheatsinked. The 200V fuse was blown (cautiously

I just checked those with my component checker (without U3105 plugged in as I wasn't sure what effect that might have) and, yes, I have several bad tantalums so those will be replaced. Oddly, C3150

Barry, Goran is right about that area. VR3147 being open will throw the circuit off. C3127 and C3129 are marked ,1mfd. Some models use 1mfd in this place. I have replaced mine with the 1mfd 63V film

I have had a total of six. Now it's one plus a parts mule which could be restored if I could find a handle with all hardware. The one that's complete serves mainly as a display for any of my many

That "Add to basket" on UK site is a charm :) --- ****************************************************************** * KSI@home KOI8 Net < > The impossible we do immediately. * * Las Vegas

Until I get that bad transistor replaced, then I don't plan on trying it connected to the display unit as a load. I tried that before I was aware of the bad transistor. Once I get that, I do plan to