Bob, I used one on satellites for a few years before building a helical 70cm antenna. I had to make an extender tube for the matching network and that allowed me to adjust the matching network to an SWR of around 1.5:1.
I have the antenna in the garage. Let me know if you want me to take pictures.
GL Rolf NR0T
On Wed, May 29, 2019, 12:49 PM Robert Bruninga via AMSAT-BB < [email protected]> wrote:
Any success with a cushcraft A27010S dual band beam?
Just got a new one and it tunes up perfectly to 1.1 SWR but only at 150.1 MHz.
Nothing we do with the matching network can lower the frequency to 145 MHz where it is off-scale high SWR.
We now added 1/2" sleeves to the driven element and threaded on #10-32 nuts on the end of all the wire elements to lower the resonance, but the best is still only at 148.2 MHz.
Am going to try extended the two piece boom an inch and lastly will try to extend the matching element.
Just wanted to see what others did to make this beam usable.
Bob, Wb4APR _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb