HF, Discone vs wire

[bearcatrp]

Thought I would post a quick video of the 2. The R75 is using a 50 foot wire, and the R8500 is using a discone about 30 feet in the air. There was a post awhile back doubting a discone on HF. It woks. The wire picks up a little better.

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[Teotwaki]

Thought I would post a quick video of the 2. The R75 is using a 50 foot wire, and the R8500 is using a discone about 30 feet in the air. There was a post awhile back doubting a discone on HF. It woks. The wire picks up a little better.

- YouTube

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Fun video and an interesting topic... Almost anything metal can act as an antenna: rain gutters, railroad bridges and so on. I say "act" because they will be very inefficient. If the transmitting station is using high power and a good antenna then the receive station can squeak by with an inefficient antenna.

I'm guessing that the discone in the test is a VHF-UHF type? It might "work" but it is likely to be inferior to most random lengths of wire of unmatched impedance.

There are discones made for HF frequencies and they are huge. Similar to this HF antenna that is 217 foot square

http://69.27.184.62:8901/tci/TCI530.pdf

It is supported by a single aluminum tower 92 feet high. The frequency coverage is 3 to 30 MHz. The pattern is omnidirectional with circular, horizontal, polarization. The nominal gain is 6 dBi.

When it comes to antennas it is a lot of fun to build and test different types to improve out monitoring efforts!

 

[prcguy]

The TCI 530 is not a Discone, its a number of stressed wire log periodics pointing downward. An HF Discone would be vertical polarized with about 0 to 2dBi gain. There is an HF Discone at the Titan Missile Museum near Tucson, AZ and here is some info on that.

Titan Missile Museum

GVARC often uses the Titan Missile Museum 's Discone Antenna for a Special Event . How to use the Discone Antenna Lighting of the Discone Input from Marty Greene Input from Rodger McIntyre...

www.gvarc.us

There are discones made for HF frequencies and they are huge. Similar to this HF antenna that is 217 foot square

http://69.27.184.62:8901/tci/TCI530.pdf

It is supported by a single aluminum tower 92 feet high. The frequency coverage is 3 to 30 MHz. The pattern is omnidirectional with circular, horizontal, polarization. The nominal gain is 6 dBi.

 

[Teotwaki]

The TCI 530 is not a Discone, its a number of stressed wire log periodics pointing downward. An HF Discone would be vertical polarized with about 0 to 2dBi gain. There is an HF Discone at the Titan Missile Museum near Tucson, AZ and here is some info on that.

Titan Missile Museum

GVARC often uses the Titan Missile Museum 's Discone Antenna for a Special Event . How to use the Discone Antenna Lighting of the Discone Input from Marty Greene Input from Rodger McIntyre...

www.gvarc.us

Please note that I never said the TCI530 was a _discone_ but what I actual said was:

" Similar to this HF antenna that is 217 foot square"

So quit wasting time on the forum and return my phone call, lol

 

[prcguy]

Calling now, planning the next caper.....

Please note that I never said the TCI530 was a _discone_ but what I actual said was:

" Similar to this HF antenna that is 217 foot square"

So quit wasting time on the forum and return my phone call, lol

 

[bearcatrp]

My discone is the Diamond D3000N.

 

[krokus]

The TCI 530 is not a Discone, its a number of stressed wire log periodics pointing downward. An HF Discone would be vertical polarized with about 0 to 2dBi gain. There is an HF Discone at the Titan Missile Museum near Tucson, AZ and here is some info on that.

Titan Missile Museum

GVARC often uses the Titan Missile Museum 's Discone Antenna for a Special Event . How to use the Discone Antenna Lighting of the Discone Input from Marty Greene Input from Rodger McIntyre...

www.gvarc.us

That looks like the conical monopole HF antennas I have used in the military.