"No, this is not Zika!" Didn't expect to get a quality laugh out of a video about the internals of a vacuum capacitor, and yet there it was. Thanks for the videos.
OMG if those things were not so expensive on Ebay, Id likely buy on for a room ornament, i love copper!!!!... Oh and radios, Im new to the world of radios and OMG so interesting!!!!
So what's the verdict? are you getting that Mag-Loop going? I have been considering doing something similar. At some point I am thinking of moving to Mexico and may only have roof-top to work with. Of course if we go very far down I won't even worry about 160 as it won't be worth the hassle. I was considering using truck solenoids for switching but after thinking about it I am not sure the duty cycle on those coils could would allow for long term energizing or if they would heat up. I may need to go junking and test that. Anyway if I end up in the Yucatan I'll just build it smaller for 75 and 40 then use verticals 20 and up. I'm still not sure this will be something we do but I like to contemplate antenna possibilities anyway. Another thing if I end up on the gulf coast would be the extreme salty humidity. Anyway I want to see more on the project. Also along the same lines Everytime I think about running 40 in the mobile I keep coming back to a luggage rack style mag loop as really the best option although I would probably just attempt to build some trombone caps or maybe enclose open air which shouldn't be an issue at 100 pep. Waiting for your next video.. :-)
Yeah that is a good video, it was the first one I watched. Curious if you are using this long term on the air? Also one of the things I was considering using was that 4 inch ducting like for dryers or direct-vent water heaters. I am just not sure how well the joints will be. It seems like I remember the old iso-loops using a steel tape like loop. Anyway most the theoretical calculators come up with much better efficiency by going to a larger diameter. I figure a 12 foot loop or if I can find 45s an octagon would not really weigh very much. I think there are some alloy solders that might work on the joints and then use a marine paint over the finished project. I'm thinking I could hoist the whole dang thing up in the air a bit into a tree or something. Anyway back to my comment, I would like to see or hear how it did on-air compared to a wisdom, dipole or G5RV or something just to have an idea.
The loop tuner has a 400pf fixed cap for 160 meter operation. It is switched in parallel with the 400 pf vacuum variable cap for that band. The 80 m band uses the 400 pf variable alone, as shown on the other videos. Woody
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I gave you a like just for smashing this capacitor up. They're definitely a piece of craftsmanship.
thankyou, I had been looking so hard to find out exactly what's inside it.
"No, this is not Zika!" Didn't expect to get a quality laugh out of a video about the internals of a vacuum capacitor, and yet there it was. Thanks for the videos.
Arching likely due to loss of vacuum. Multi ring trombone cap, I never knew exactly what was inside a vac cap. Worthwhile video, Tnx !
Good vacuum but was in russian military use, hard life. Woody
Crosstown Traffic! Great video! 73's KG5LQM
Can you share the diameter and mesurment of each copper tube and the spacing? Thank you in advance
4.5" outer dia, about 1/4: between the rings
OMG if those things were not so expensive on Ebay, Id likely buy on for a room ornament, i love copper!!!!... Oh and radios, Im new to the world of radios and OMG so interesting!!!!
What a sad day. Too bad it arrived broken :(
the volt rating is how much air you managed to pump out of it.
So what's the verdict? are you getting that Mag-Loop going? I have been considering doing something similar. At some point I am thinking of moving to Mexico and may only have roof-top to work with. Of course if we go very far down I won't even worry about 160 as it won't be worth the hassle. I was considering using truck solenoids for switching but after thinking about it I am not sure the duty cycle on those coils could would allow for long term energizing or if they would heat up. I may need to go junking and test that. Anyway if I end up in the Yucatan I'll just build it smaller for 75 and 40 then use verticals 20 and up. I'm still not sure this will be something we do but I like to contemplate antenna possibilities anyway. Another thing if I end up on the gulf coast would be the extreme salty humidity.
Anyway I want to see more on the project. Also along the same lines Everytime I think about running 40 in the mobile I keep coming back to a luggage rack style mag loop as really the best option although I would probably just attempt to build some trombone caps or maybe enclose open air which shouldn't be an issue at 100 pep.
Waiting for your next video.. :-)
See my other videos, ruclips.net/video/VOKsCRaRcqg/видео.html for construction details. woody
Yeah that is a good video, it was the first one I watched. Curious if you are using this long term on the air? Also one of the things I was considering using was that 4 inch ducting like for dryers or direct-vent water heaters. I am just not sure how well the joints will be. It seems like I remember the old iso-loops using a steel tape like loop. Anyway most the theoretical calculators come up with much better efficiency by going to a larger diameter. I figure a 12 foot loop or if I can find 45s an octagon would not really weigh very much. I think there are some alloy solders that might work on the joints and then use a marine paint over the finished project. I'm thinking I could hoist the whole dang thing up in the air a bit into a tree or something.
Anyway back to my comment, I would like to see or hear how it did on-air compared to a wisdom, dipole or G5RV or something just to have an idea.
I like the music thanks fore the video 73s YU5KBM
That was cool thx,,. When you Gona break some more shit!!
Dots like a sparking, arcing tought vacuum...
Well, *that* is what I call reverse engineering at it's peak :)
Cut the background noise.
And you failed to explain one of the most important aspects of the capacitor. ie How the seal allows the structure to telescope.
That capacitor was a fixed capacitor and does not have a bellows. Woody
Oh. Well how do you tune the loop then?
The loop tuner has a 400pf fixed cap for 160 meter operation. It is switched in parallel with the 400 pf vacuum variable cap for that band. The 80 m band uses the 400 pf variable alone, as shown on the other videos. Woody
Что же ты делаешь? Изверг?
English please.