TSP  

Anytime my friend. I hope all is well with you.

The 10-year anniversary of the channel is coming up! I'll do special video with a tour. :)

@@Thesignalpath Looking forward for that special ;)

@@Thesignalpath YES! Looking forward to it!

vidas v , True enough, but nicely shown in 13 digit accuracy. ROFL de KQ2E

Rick Dabney , Kind of sums up the spirit of the day. LOL I was not in that frequency domain at the time! I was topping out at 150 MHz. LOL

Gyn Professor , Sounds like a comment by Paul Carlson of Mr Carlson's Lab. LOL

And the RF dummy load waveguide, a large tapered section of waveguide filled with an iron oxide loaded epoxy. New ones would always smoke for a few minutes as they burnt off all the paint. Same for the RF absorbent chamber, where the black carbon foam would smoke as well, till it had burnt out the plastic used to make the foam. Then it was brittle, but lasted till it either crumbled from touch, or just collapsed from age.

Colin Alston , So, show them what a ham can do! LOL de KQ2E

Digital is faster for absolute measurements. Analog is faster for the first derivative. So finding the peak is easier with analog, reading the true value easier with digital. Though with a fast enough update rate (60Hz or better) and appropriate output display (eg bar graph, oscilloscope-style trace line, etc) a digital display can serve just as well as an analog one for easy first derivative estimation. But even very good calipers don't have that capability, so I'll also keep my dial calipers handy!

VejyMonsta , And, could save about $5,000 !

hahaha. Beat you to it. I bought two different models ;)

Not a very good one, specially if the signal is complex and broadband.

Yes, that is guaranteed performance. They often exceed that without issues.

He was there. Watching from above! :)

You set the desired frequency, and the desired output level. Optionally, configure the desired modulation. That’s about as basic as it gets.

Nothing, it is the spare volume. It does though need to be made very lossy, so that it does not interact with the measuring chamber. Tthe piston varies the volume of the lower chamber, and as the frequency lowers the top chamber gets smaller till at the end stop it is almost non existent. Piston does need to have a very good RF ground, so there is a very tight tolerance, plus a few sets of RF fingers, that are on the outside of the piston that ride on the wall, to get a good RF connection. Heavy silver plate on both parts inside the cavity, polished and ground during manufacture to get a very close tolerance cylinder diameter inside in the silver coat, and same for the piston, so it has only a few gas molecules of clearance between the two. There is probably $50 of silver in the instrument as plating. Then the cavity is sealed with a good air seal and purged with nitrogen, to keep the cavity from oxidising, and there is a pressure compensating bladder to allow temperature and altitude changes as well.

@@SeanBZA maybe not $50. I could plate your entire car with 2oz of silver. Putting that much plating on it would wreck your very careful machined tolerances.

@@stargazer7644 Machine after plating, to get the tight tolerances. you will polish off a part of the plating, because in most cases plating is not always totally even, especially with complex shapes.

I am sorry. I misunderstood you.

No worries, I'll keep the love going.