6-meter Inverted Delta Skeleton Slot Antenna ~ 03/06/2024

Speaker/Presenter: John Portune, W6NBC
Documents (including slideshow): www.dropbox.com/scl/fo/3ndsov...
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[@W4BIN]

One class of TV transmitting antenna are vertical slots in a large pipe, horizontally polarized. Copper is superior to aluminum for all antennas, as joints in copper (soldered) do not suffer any corrosion effect that aluminum (clamped/bolted) do. Ron W4BIN

[@hygri]

That was an eye-opening lecture, thank you John, and thank you Dan & RATPAC - this has fired my imagination in a new direction. Your HF dual delta-slot with a tuner the bottom is ingenious and it'd be fun designing a high-power tunable reactor / phasing network for the bottom - this VHF design is very interesting too, now I wonder, for UHF one could build a derivative of a slot-fed Yag-Uda using this as a feed.. A bit of tunability would go a long way, especially at 13cm... EZNEC awaits for sure. Lots of EZNEC, and bits of metal.
I suspect I'll build the HF and VHF anntennas, and likely some higher band stuff too. Great lectures as always, cheers all.

[@Fraksional]

John, I bought your Kindle e-book! Requesting just a few more slides...
I'd love to see a circuit diagram for the relay switching you used for your Double Delta Slot. (I'm thinking about just going on to try it. But I want to be sure I get corrected design that the slot is ended inside the remote tuner. It does seem that any balun would form the slot placed after the tuner at the coax. Did I get your instructions right? Or, do you only use one of the two Delta slots at a time?)
Also, without the consideration for convenience and weather, why wouldn't a remote antenna tuner always be best, resonant or non-resonant? (I understand not to burn up coax with an indoor antenna tuner for non-resonant antennas.)

[@galaxy0088]

If you are running power a 2:1 swr will cause problems

[@WECB640]

Skip the first 8 minutes if you don't want your ears to bleed.

[@Fraksional]

What high pitch tone? One benefit of miltary service took out those audio frequencies about 40 years ago.

[@WECB640]

I'm sorry for your loss. Thank you for your service. @@Fraksional

[@Fraksional]

@@WECB640 It was my pleasure long ago. 73

[@bussi7859]

Why use a heavy , weak and expensive metal when aluminium works great. QLF and 99

[@k7rex]

I have no clue why he went with copper, but he does address other materials, such as aluminum, closer to the end and says it is much better. He also talks about other materials including some about using plastics.

[@hygri]

HIHI QLF

[@Andy2e0ree]

Sorry love to watch but the high pitch tone was just to bad 73 de 2e0ree