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+--- Thread: Seeking 5/16" to 1/2" whip adaptor (/thread-570.html)
Seeking 5/16" to 1/2" whip adaptor - VK6KIH - 23-05-2018
Good afternoon,
I have a 80m chirnside helical whip mounted on a large spring mounted on the bull bar. Since the whip has a 5/16" fine thread male base and the spring has a 1/2"female coarse thread, I have to use a brass adapter to mount it on the spring.
To screw the 5/16” whip into the spring’s half inch female thread I use the brass adapter in the attached photo. However the adapter thread is now worn so the whip is wobbly. So I need to either source a replacement adapter or ditch and replace my set of Chirnside HF whips...!
I expected finding a replacement adapter to be easy, but not so. The gender of my HF helical whips is the opposite of today’s uhf whips - so most of the adaptors on sale are reverse gendered.
Can anyone please suggest a source of a replacement adapter ?
Many thanks
Ian Hill
RE: Seeking 5/16" to 1/2" whip adaptor - VK3ALB - 23-05-2018
Two Aussie sites I found on Google
https://www.wagneronline.com.au/threaded-antenna-adaptor/antenna-accessories/communication-accessories/cba273-16168/11439/pd/
http://www.andrewscom.com.au/site-content-section-08-mobileone.htm (search for RAS)
RE: Seeking 5/16" to 1/2" whip adaptor - VK6KIH - 23-05-2018
(23-05-2018, 04:59 PM)VK3ALB Wrote: Two Aussie sites I found on Google
https://www.wagneronline.com.au/threaded-antenna-adaptor/antenna-accessories/communication-accessories/cba273-16168/11439/pd/
http://www.andrewscom.com.au/site-content-section-08-mobileone.htm (search for RAS)
Appreciate you taking the time to respond, Lou.
I saw the Andrews advert, and also one at Mobile One, but their description is reverse gender to what I need (see their diagram attached). Similarly, the Wagner advert is for the reverse gender to what I'm seeking (their's has a female 1/2" and a male 5/16").
The adapter I need will have a male 1/2" end and a female 5/16" end.
Ian
RE: Seeking 5/16" to 1/2" whip adaptor - VK2EHQ - 24-05-2018
If all else fails, an engineering workshop could turn one out for you. Won't be as inexpensive, but when there's not an alternative .......
Cheers,
Peter
RE: Seeking 5/16" to 1/2" whip adaptor - VK6KIH - 24-05-2018
(24-05-2018, 10:20 AM)VK2EHQ Wrote: If all else fails, an engineering workshop could turn one out for you. Won't be as inexpensive, but when there's not an alternative .......
Cheers,
Peter
Discovered my son-n-law has access to a lathe and all the right gear. Looks like a solution is at hand! ;-) Thanks Peter!
RE: Seeking 5/16" to 1/2" whip adaptor - VK4ADC - 27-05-2018
(24-05-2018, 11:06 AM)VK6KIH Wrote:(24-05-2018, 10:20 AM)VK2EHQ Wrote: If all else fails, an engineering workshop could turn one out for you. Won't be as inexpensive, but when there's not an alternative .......
Cheers,
Peter
Discovered my son-n-law has access to a lathe and all the right gear. Looks like a solution is at hand! ;-) Thanks Peter!
Hope you get more than one made as that arrangement seems like a sure-fire way to shear the 5/16" segment as the HF whip sways around. Maybe a really good tough steel is called for too....
RE: Seeking 5/16" to 1/2" whip adaptor - VK6ZFG - 28-05-2018
Hi Peter
Are you sure it is 5/16" Brass tread? As far as I am aware this thread is unique to Australian antennas.
To me in the picture it looks more like a 9/16" UNF thread as more commonly found on overseas antennas? eg such as antennas aimed at the CB market.
If this is the case finding an adaptor should not be a problem.
Igor
VK6ZFG