kny2xb
Member
Good Evening/Morning;
DISCLAIMER: I didn't want to tack onto someone else's post, but if I should have, I know that this will be moved
I would like to build and mount a couple of base antennas using the SO-239 connector quarter-wave ground-plane design
One will be for receiving/scanning a mix of VHF: aviation, marine, MURS and rail
I would also like to build one to receive and transmit on the GMRS frequencies
My questions are:
1 Would it be worth using an N female chassis connector and cable instead of the SO-239 for the GMRS antenna?
2 Since the designs that I've read about are usually used at VHF/2 meter frequencies, the element lengths are in the 19-20 inch range
At UHF frequencies, is it feasible to build:
a half-wave using a 12.06 inch/306 mm vertical with 12.66 inch/322 mm radials
or a five-eighths wave using a 15.07 inch/383 mm vertical with 15.83 inch/402 mm radials
[I hope that I got the measurements correct]
I'm figuring a center frequency of 465.1375 MHz just in case anyone ever puts up a GMRS repeater
If this has been covered before and I missed it, I apologize and I'll say: OOPS! my bad
If not, I appreciate any answers, advice, feedback, etc before I dive into this
DISCLAIMER: I didn't want to tack onto someone else's post, but if I should have, I know that this will be moved
I would like to build and mount a couple of base antennas using the SO-239 connector quarter-wave ground-plane design
One will be for receiving/scanning a mix of VHF: aviation, marine, MURS and rail
I would also like to build one to receive and transmit on the GMRS frequencies
My questions are:
1 Would it be worth using an N female chassis connector and cable instead of the SO-239 for the GMRS antenna?
2 Since the designs that I've read about are usually used at VHF/2 meter frequencies, the element lengths are in the 19-20 inch range
At UHF frequencies, is it feasible to build:
a half-wave using a 12.06 inch/306 mm vertical with 12.66 inch/322 mm radials
or a five-eighths wave using a 15.07 inch/383 mm vertical with 15.83 inch/402 mm radials
[I hope that I got the measurements correct]
I'm figuring a center frequency of 465.1375 MHz just in case anyone ever puts up a GMRS repeater
If this has been covered before and I missed it, I apologize and I'll say: OOPS! my bad
If not, I appreciate any answers, advice, feedback, etc before I dive into this