Another antenna question

[lu81fitter]

I have been looking at half wave antennas. I have found this one with a base load and a 55" whip.

https://www.theantennafarm.com/catalog/laird-technologies-b1442n-752

Using an online calculator, a half wave antenna is 36 1/4" at 155 MHz.
Can I use a 36 1/4" whip and have satisfactory results, or is a base load required?

 

[Ubbe]

The ends of a halfwave are high impedance at several thousands of ohms and will need some sort of adaption to a lower ohm coax.

/Ubbe

 

[popnokick]

The Laird B1442N has a base loading coil and is designed to be used with 50 ohm coax, with a tunable (cutting chart) bandwidth of 5 mHz between 144 and 174 mHz. I don't understand the reply from Ubbe regarding needing "adaptation to a lower ohm coax".

 

[doctordialtone]

don't understand the reply from Ubbe

He tends to over-complicate everything. I placed him on ignore a while ago.

 

[alabamarailfan]

lu81fitter,
Use the cutting chart that comes with the antenna. It will take in to account the base loading and other features to get you centered about 155 MHz.

John D. Peterson/ W4JDP

 

[mmckenna]

Using an online calculator, a half wave antenna is 36 1/4" at 155 MHz.
Can I use a 36 1/4" whip and have satisfactory results, or is a base load required?

The base load is required to match it to a 50Ω radio/coax.

 

[lu81fitter]

The base load is required to match it to a 50Ω radio/coax.

That's what I was looking for. Thank you.

lu81fitter,
Use the cutting chart that comes with the antenna. It will take in to account the base loading and other features to get you centered about 155 MHz.

John D. Peterson/ W4JDP

I did not purchase that antenna. I was just using it as a reference.

 

[Ubbe]

I often try to explain why and the reasons behind it instead of a simply yes or no. Maybe the person will learn something and improve his knowlededge and the next time he find hemself in a similar situation he hopefully can figure out the answer himself and have a better understanding of the whole picture. Of course there will always be people who couldn't care less and only wants to be told what to do and will never understand how things work. There are usually several people answering an OPs questions and he can then choose which answer will best match his skill set.

/Ubbe

 

[MisterLongwire]

Lol
Alot of words. Very little factual info