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Did you include the bypass capacitors on the photo-voltaic bias outputs? There should be one across each, so four altogether. They are essential for best noise performance. Ed

I have a type 284 that I am working on again to see if I can’t get the td pulse side working again. Where I am at now is the last time I was in the pulser I was able to confirm that D180 is good on

OMG, do I see the list erupting into an OT travelogue ? :-) Liam

I can do better: I'm in a 500 souls pueblo in Spain..... :-) Leo

Quit whining, I'm in Canada. You know: Mounties, beavers, maple syrup, ice and snow and Bob 'n Doug McKenzie, eh ? https://en.wikipedia.org/wiki/Bob_and_Doug_McKenzie Liam

Apparently dnmeeks has left this forum. On the off chance that he will be selling another batch of extenders some day, does anyone have his current email address?

I have a P6046 that is missing almost all of its accessories. I need the 10x attenuator, part number 010-0361-00 and 2 of either or both the swivel probe tips, part number 206-0162-00 (hex base) and

I just resurrected a 2465A CT. I first want to express my appreciation for the threads here that were such a great help, especially Gregor's "noise on readout" adventure, I thought I would summarize

Hi all sampling gurus, I am continuing performance check of my 7S14 (B020274). Any idea how many pieces were manufactured? All the Hg cells were empty (and were leaked also). I replicated with the

How come it's always on the "other" coast with pickup only!? Guys like me on the other end of the country never get a chance!

I will agree with Siggi on this one as far as one or more of those relays being the likely cause. One of my TDS scopes had the same problem. Replacing the relays he mentioned solved it. And yes he'll

Atillio, the TG may be OK now, producing the right center frequency. You should be able to get the amplitude to peak at narrowest bandwidth, and drop off when the tracking pot goes either way from the

Hi Ed, on the TR502 Tracking Generator manual I read this note "NOTE: If the TR502 is used with spectrum analyzer 7L13 the TRACKING ADJUST may run out of range at high resolution (3 kHz or less)

"Hmph. Including the cable?" I covered the probe amp, probe, and probe cable with aluminium foil grounded to the scope as best as I could. The Pomona connector I used to connect the probe to the input

Hey Steve, The classic fault that causes SPC on these scopes is that the signal relays on the input attenuator hybrids develop high resistance. They are used to shunt in the internally generated

Hi Dave, Thanks for the info. Tek did the same thing with their 4663 flat bed plotters, so I am familiar with the technique. I would very much like not to have to do that, though. I have bought some

A year or so ago I bought a TDS784C that seemed to be in pristine condition except for a missing left rear foot. It powered up and worked perfectly on every signal I tried it on. I found that I rarely

Hi Ed, sorry if I wrote an inaccuracy, the 10 pF capacitor is not between the junction point of the crystal with the varicap diode and ground, but on the other terminal of the crystal towards ground.

Weird, I just mailed a part to Massachusetts and it got there in two days.

Thanks. Supply rails are (now) good after replacing quite a few capacitors that weren't doing much (after tracing a few bad ones I ended up doing all electrolytics on the low & high voltage psu boards