Originally Posted by xodeuce
If you know someone with a 1/2λ antenna, you could always try that and see if it's any better.
The SBB-1 is 1/2 wave on 70cm. If we know the SWR on that band it might be useful, too. Can't see a way to tune it from the photos on the web. Sorta looks like a HT rubber duckie with an NMO mount. :-)