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That's a VERY well thought-out, well-written ebay ad. Anyone here who's trying to recap one of those scopes should just take advantage of the 15% discount for TekScopes members and buy one of these

New pictures available for those interested in my modest restoration of this unit. You’ll notice that this units, unlike some that I’ve seen, doesn’t have a fixed line cord. Probably intended

Spelling errors as well. Sorry for my terrible iPhone... ???

Eric, Thanks. I have a GR to BNC brand new adapter coming in. But it might take a while from the US. I wouldn’t mind having a couple of extra ones and stuff. I’m in the middle of recapping the

The strobe is adjustable in several ways (avalanche volts, snap-off current, bridge volts). But wouldn't insufficient drive show up as an incorrect sample time, lack of sensitivity, or both? As I

Stephen, The gr connectores will be the hard part. The 5ns cable I belive you can use and "good quality" 50 ohm cable. The importent part is the impedance match. 75 ohm and 50 ohm cable and jacks are

Anyone has GR874 to BNC adapters, T’s and 50ohm through terminations they’re willing to part with? 5ns cable as well? Thanks

Hello folks, I enjoy reading here very much. Indeed everyone can learn something. One of my past job duties was to teach young professionals a basic understanding of aerodynamics dealing with mining

Hi Tom, Thanks for your gracious reply. I do see your point now and it makes sense to me. Also, I agree, there are too many problems with the example I gave. Also, somehow I missed your "thermostat"

Thank you Raymond. I just looked briefly at internet too see whether or not it could do random sampling. Charles can forget my inappropriate warning. Albert

I do have kits available, which I custom assemble, to suit your EXACT machine. I'll need CLEAR photos of your A1 A2 A3 A4 A5 A9 A14 PCB's Saves you the time and hassle of sorting and sourcing, and

Using double diodes changes a lot of the conditions. Try going back to single diodes instead of series doubles, and see how it works. You can temporarily short one of the diodes in each pair for

You may recall that I have an S-1 sampling head with blown diodes, which I replaced with M/Acom MA4E1339 Schottky diodes in SOT-323 packages. I used both diodes in the package in series, max 1.2 pf

It is better to place the proper value, 820-ohm nominal, in both places. Voltages look OK ballpark. Perhaps some of the transistor gains decreased over time and now positive feedback coming back

Can't think of an easy explanation. When you are making the table could you also mark down both A gate width and B gate width while you are measuring B sweep timing? Also please observe if you really

My PM3340 has a signal delay line... Trigger pickoff right at the N-socket and a nice blue Suhner coax cable after that for each channel. Nice but very heavy beast. Raymond

Hi Max, It's nasty that the PG506 trigger output is not usable as pretrigger. Also (e.g. in my PG506) there is too much between-trigger jitter to view the fast edge of the next pulse. That's why a

Hi Albert, you made me doubt about the PG506 now :-) I would not like to have calibrated the 7A16A trying to compensate for the aberrations of the PG506 itself. In the weekend I'll check the fast rise

Every so often, I get some intriguing test gear from inside places that make test gear. It's fascinating to see what they use themselves. I just overhauled and posted such an item, an HP K09-0982B, a

History is entirely unknown. I bought it for equivalent of about $20 from guy who does disposal for universities and state own research institutes etc. It was heading for a scrap pile. Tomorrow I'm