Oh yes, he's quite right. However New Zealand isn't pronounced Dow Corning ;). Don Black.

Isn't that how it's always done (Don down-under in Australia)? ;) Don Black.

I bought a cheap USB microscope after a recommendation from one f the forums. It was about $20.00 plus another $10.00 shipping. It has a stand, light source, focus and a scale you can calibrate it off

Wow! And do you have any drawings of your mouse trap?? Don Black.

We used to do a similar think with tight TV knobs. We used a strong length of twine (string - builders line is good) and just wrapped a single turn around the shaft behind the knob. Then pull both end

Fair enough Ed, I thought it was first mentioned as a refrigerant (to make cold) not as a freon replacement in probes. Don Black.

Thanks everyone. I was thinking of how to keep my ice cream cold but use on hot transistors makes sense. Don Black.

Spooky. On both these eBay listings there are ads for losing weight. Do you think they're looking at me?? Don Black.

For comparison, there's a Tektronix 2465B on eBay item 261228507175 and they would send to me for $158.40. Quite a difference (I know there can be variations in how well it's packed, etc.) but that's

Thanks, my original comments still apply. Maybe there's a refrigeration Guru here who can shed more light on its use in refrigeration. Don Black.

Interesting but I don't really want it. Just as well, since the freight costs to me is $1500.00, Ouch! Don Black.

Does it boil at 60 deg F or -60 deg F at atmospheric pressure? 60 deg doesn't sound like a great refrigerant unless perhaps used in a low pressure system. Don Black.

Thanks Dave. Don Black.

Is that the total drain of all the plugins or just one bay (7A17)? Don Black.

I'm not sure if the question is what non plugin scope(s) are available to use as a plain oscilloscope or what scope that can take plugins can also operate as an plain oscilloscope without any plugins

Tantactite! Don Black.

Part of this discussion is from the Tektronix catalog that indicated the field office should be contacted to find the connections for a raster scan and the question asked how they would achieve it. Do

The proposition was that the two sweep units had to go into the vertical slots with one switched to horizontal sweep (not sure why?). In that case the blanking isn't internally connected. At least eve

Well, I checked the 7B53 manual before posting and it indicated it was available. At least the delayed sweep gate is fed from one of the normally input BNC connectors when it's not selected as an inpu

I feel the pain, good advice on defocussing. Sadly it seems the horse is over the hill and far away in this case. Don Black.