Those thermometers see IR from an exposure cone that grows with distance to the surface. So if you're holding it say 10 inches from a surface, it's averaging temp over a circular area of something around 3 inches diameter (depending on device). So when temping a small surface like this you'd get a more accurate reading if you hold it very close. Love your project, really nice build.
Even with a proven attenuator/tap I always sweat bringing any transmitter power close to the input of my spectrum analyzer! Great repurposing, thanks for sharing. 73 - Dino KL0S
@@IMSAIGuy @PCS electronics i fixed it by removing the top white slice with the lettering and soldering a thin tin tab to the what was left of the broken tab then crazy glue the slice back on top. Resistance did change however from 51 ohm to 58 ohm. tested it on my cb radio & amp outputting 240 watts. No problem. I have it mounted inside a metal electric outlet box with a metel cover and 4 holes punched out. Straight Solid copper wire from resistor to center of pl259 on the opposite side of it. Would have ordered a new one but it take a month for delivery from China
Those thermometers see IR from an exposure cone that grows with distance to the surface. So if you're holding it say 10 inches from a surface, it's averaging temp over a circular area of something around 3 inches diameter (depending on device). So when temping a small surface like this you'd get a more accurate reading if you hold it very close. Love your project, really nice build.
yes, that was an old video. companies have given me thermal cameras for review and I use those now.
Nice tools! Those exact center punches -- I haven't seen that but I can see where it allows to drill precisely in the center of a mounting stud.
Even with a proven attenuator/tap I always sweat bringing any transmitter power close to the input of my spectrum analyzer! Great repurposing, thanks for sharing. 73 - Dino KL0S
Nice now instal a BNC for tapping rf
I did, not sure if I filmed it. but I also added a 20dB attenuator: czcams.com/video/aScxZ_1Cx0Q/video.html
Can this type of resister be submerged in a tin can of oil for heat dispersion?
Thanks.
I don't think what would work well. if you put it on a heat sink and then put that in oil, maybe
@IMSAI Guy ok..that makes sense..
Thanks.
I know this is an old video - it is taking me awhile to watch all of these :) - but MY thought would be to fill the cavity with oil!
Touches resistor and doesn't realize he is getting burned by RF energy.
Unfortunately I know how that feels. it was thermal
You have all the tools for this
Hey, the thin tab on mine broke flush off while i was wiping some heat grease off. Any ideas what to do? Thanks
buy a new one :(
@@IMSAIGuy what a waste, why the Fuk would theu puy a foil thin tab on it especially knowing how hot it can get too
@@IMSAIGuy @PCS electronics i fixed it by removing the top white slice with the lettering and soldering a thin tin tab to the what was left of the broken tab then crazy glue the slice back on top. Resistance did change however from 51 ohm to 58 ohm. tested it on my cb radio & amp outputting 240 watts. No problem. I have it mounted inside a metal electric outlet box with a metel cover and 4 holes punched out. Straight Solid copper wire from resistor to center of pl259 on the opposite side of it. Would have ordered a new one but it take a month for delivery from China
The whole "bowl" looks to be a few inches deep. Why not just put a couple quarts of mineral oil in there, cover everything up? Just saying...
I'll take it to Jiffy Lube
That's what I was thinking when I saw the rubber gasket on the cover!