Telescopic whip for GMRS

[StoveTop]

I had some extra adapters laying around and I realized I could attach a rather long telescopic whip to my UV5R. It is 28.75” long fully extended, 30.75” with adapters.

I receive just fine with it, I am wondering if it is suitable for transmitting on GMRS. 
 

Thank you.

[MichaelLAX]

If you reduce it to 15-3/4 inches (not including adapters), it should act like a 5/8ths wave with your hand acting as the ground plane for 467 MHz transmission on the GMRS repeater channels

[MichaelLAX]

Maybe my calculations are wrong

Check out:

Smiley 46510

[Lscott]

I would suggest trying this one out.

https://www.dxengineering.com/parts/pry-al-800

I’ve used these on a short run of RG-58 coax. They work fine without a ground plane. The match on the Ham bands is pretty decent. On MURS and FRS/GMRS it’s up a bit but I think it was still under a 2:1 match making it usable.

[Lscott]

You can find these on line at places like Amazon, eBay etc. I think I got my second one off an eBay seller.