When Doug Wheelock KB5BOC was on the ISS, I tried many times to work him when using a 5/8 whip on the car but with no success. I then changed to a 1/4-wave whip and worked him first call. I attributed this to the fact that with a 5/8 the major lobe is towards the horizon whereas a 1/4-wave has a lobe tilted further upwards.
Regards, Keith G0RQQ
Sent from my BlackBerry 10 smartphone on the O2 network. Original Message From: John Geiger Sent: Saturday, 30 June 2018 16:44 To: David Quick Cc: AMSAT Subject: Re: [amsat-bb] AO91, AO92 and XW-2 sats with mobile whips
Hi Dave,
That is great to know. Sounds like it would work. I wonder if a 1/4 wave antenna might be better than a 5/8 wave as it might have some higher lobes as well and cover more of the pass. Does anyone know about this?
73 John AF5CC
On Fri, Jun 29, 2018 at 8:20 PM, David Quick david.quick@frontiernet.net wrote:
I have made numerous AO-85, 91, 92, and SO-50 contacts from my truck, mostly while stationary due to the desire to log the contacts, with a 25 year old Kenwood TM-733a (~25 watts) and a dual-band antenna on the roof of the truck. Even a simple 2m quarter-wave works fine and offers a decent match on 435 MHz.
The feature that helps the most is the radio's full duplex capability. When I hear my own voice on the downlink frequency I know I'm hitting the bird.
-----Original Message----- From: AMSAT-BB [mailto:amsat-bb-bounces@amsat.org] On Behalf Of John Geiger Sent: Friday, June 29, 2018 3:03 PM To: AMSAT Subject: [amsat-bb] AO91, AO92 and XW-2 sats with mobile whips
I am hoping to get into mobile satellite operations soon, and at times I will be able to operate portable with a dualband yagi antenna. . Other times, though, I will be on family trips and unable to stop for satellite passes, so would have to operate while in motion. Are AO91, AO91, and the XW-2 satellites able to be worked using a 1/4 wave or 5/8 wave dualband mobile whip antenna?
73 John AF5CC _______________________________________________ Sent via AMSAT-BB@amsat.org. 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: http://www.amsat.org/mailman/listinfo/amsat-bb
_______________________________________________ Sent via AMSAT-BB@amsat.org. 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: http://www.amsat.org/mailman/listinfo/amsat-bb