You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
The Feb 2025 Radioddity Giveaway Results are In! Click Here to see who won!

Reply to thread

Message

The thing is they use that 5/8 wavelength long wire for loading the antenna as well, and a load on an antenna determines electrical length not by how much wire was used, but by the reactance that it adds. It also adds additional losses that a full length whip does not have.

It is a different thing entirely to say they used a 5/8 wavelength long wire to make an antenna and the antenna is an electrical 5/8 wavelength, unless of course you are in marketing...

Even if it really were an electrical 5/8 wavelength, you now have a matching problem as its impedance and reactance are no where near where they would need to be to have a low SWR...

Further, it is the physical length in this case that determines the radiation pattern, which means you will have the radiation pattern of a 5 foot antenna, which is not as good as the radiation pattern of a 8.5 to 9 foot antenna at these frequencies.

The DB

<blockquote data-quote="The DB" data-source="post: 454792" data-attributes="member: 21346">The thing is they use that 5/8 wavelength long wire for loading the antenna as well, and a load on an antenna determines electrical length not by how much wire was used, but by the reactance that it adds.&nbsp; It also adds additional losses that a full length whip does not have.It is a different thing entirely to say they used a 5/8 wavelength long wire to make an antenna and the antenna is an electrical 5/8 wavelength, unless of course you are in marketing...Even if it really were an electrical 5/8 wavelength, you now have a matching problem as its impedance and reactance are no where near where they would need to be to have a low SWR...Further, it is the physical length in this case that determines the radiation pattern, which means you will have the radiation pattern of a 5 foot antenna, which is not as good as the radiation pattern of a 8.5 to 9 foot antenna at these frequencies.<a href="http://hittman.us" target="_blank">The DB</a></blockquote>

[QUOTE="The DB, post: 454792, member: 21346"] The thing is they use that 5/8 wavelength long wire for loading the antenna as well, and a load on an antenna determines electrical length not by how much wire was used, but by the reactance that it adds. It also adds additional losses that a full length whip does not have. It is a different thing entirely to say they used a 5/8 wavelength long wire to make an antenna and the antenna is an electrical 5/8 wavelength, unless of course you are in marketing... Even if it really were an electrical 5/8 wavelength, you now have a matching problem as its impedance and reactance are no where near where they would need to be to have a low SWR... Further, it is the physical length in this case that determines the radiation pattern, which means you will have the radiation pattern of a 5 foot antenna, which is not as good as the radiation pattern of a 8.5 to 9 foot antenna at these frequencies. [URL="http://hittman.us"][COLOR="Black"]The DB[/COLOR][/URL] [/QUOTE]

Top Bottom