16-08-2021, 11:31 PM
Well. The Escort says zilch! 
The one I have is "only" an electricians 110 but was free!
It was left by a smart meter installation tech. at my great grandmother's house, the company was called and told but they said it wasn't worth the trouble getting it back.
I think that that model is about £150... If they had asked nicely we could have dropped it into a carriers agent and they could have had it returned for a couple of squid
their loss!
After I had finished with the experiment I did try my "measure the space charge current" method against powering the valve with a regulated dc supply... The answer it gave was 8.6Volts for equivalent space charge, measured across cathode/grid,
Could have done that from the start ...
Mark Hennessy Wrote:In my experience, if you approach Fluke, you'll be lucky to get a sensible answer at first, though if you persist, you might eventually get to speak to someone more technical. If they really don't want to answer the question, they eventually send you free stuff to make you shut up and go away. I got a baseball cap, a notebook and a memory stick, all with Fluke branding. I should probably put them on eBay one day...Not direct from Fluke but how about getting a free Fluke multimeter
The one I have is "only" an electricians 110 but was free!
It was left by a smart meter installation tech. at my great grandmother's house, the company was called and told but they said it wasn't worth the trouble getting it back.
I think that that model is about £150... If they had asked nicely we could have dropped it into a carriers agent and they could have had it returned for a couple of squid
their loss!Kalee20 Wrote:A moving-iron or hot-wire analogue meter will read true-RMS of course- if the AC component only is wanted, it is simple to connect a blocking capacitor in series. But a meter which claims to read true RMS, yet doesn't, is going to catch somebody out.
After I had finished with the experiment I did try my "measure the space charge current" method against powering the valve with a regulated dc supply... The answer it gave was 8.6Volts for equivalent space charge, measured across cathode/grid,
Could have done that from the start ...
