VHFcontesting
[Top] [All Lists]

Re: [VHFcontesting] New to VHF/UHF Contesting: Next Steps

To: Jarred.Jackson@hotmail.com, vhfcontesting@contesting.com
Subject: Re: [VHFcontesting] New to VHF/UHF Contesting: Next Steps
From: John Young via VHFcontesting <vhfcontesting@contesting.com>
Reply-to: nosigma@aol.com
Date: Sat, 2 Apr 2016 13:58:54 -0400
List-post: <vhfcontesting@contesting.com">mailto:vhfcontesting@contesting.com>
Jared, 


Ah, Rochester, FM contesting nirvana,you are a lucky dog.  I am portable, 
notrover.  Rover is way too specialized andrequires a lot more bands & gear 
than I want to mess with right now inorder to get a good score compared to FM 
only.  I had never heard of, orconsidered, H Pol for FM since H Pol normally 
used for SSB, not FM which isnormally V Pol.  It is my understandingthat 
receiving H on a V antenna introduces 20-30 dB of losses (theoreticallyinfinite 
loss).   Setting up my antenna'sfor H I would have thought would trash my 
scrores, not improve them. As I poured through all the responses I see the 
wisdom in having 6M SSB and running both V & H pol.  As you will see in 
additional responses, tilting my antenna's to 45 degrees and having 6M SSB to 
"snag & drag" SSB operators "down" to FM seems to make a lot of sense.   Its 
not self torture.  Its fun, I really like the challenge. Scores are low for 
everyone, except in WNY, where you seem to be verywell organized.  
 
73, John, KM4KMU



-----Original Message-----
From: Jarred Jackson <Jarred.Jackson@hotmail.com>
To: nosigma <nosigma@aol.com>; vhfcontesting <vhfcontesting@contesting.com>
Sent: Wed, Mar 30, 2016 10:57 pm
Subject: Re: [VHFcontesting] New to VHF/UHF Contesting:  Next Steps

John,

Great FM only setup. I am fortunate enough to live in an area (Rochester NY) 
where we have more than average FM activity, but as far as I know, there are no 
FM-only rovers/portable ops with a setup like that (omnis are most common). One 
emerging  operating practice we have in WNY is to support FM-only contesters 
using horizontal polarization on 6m (50.300 MHz). Lots of home stations can do 
this and just about every rover can as well without running too high on SWR.  
All you have to do is ask. 

Good Luck. I often think that the FM-only guys enjoy self-torture ! If you 
lived anywhere around me, I would find a way to get an all-mode VHF/UHF radio 
in your hands ASAP and try to convince you to turn those antennas 90. 


Jarred - KF2MR

All mode, 9 band rover
Dedicated FM capabilities on 50-1296 with vertical omni antennas


________________________________________
From: VHFcontesting <vhfcontesting-bounces@contesting.com> on behalf of John 
Young via VHFcontesting <vhfcontesting@contesting.com>
Sent: Wednesday, March 30, 2016 9:32 PM
To: vhfcontesting@contesting.com
Subject: [VHFcontesting] New to VHF/UHF Contesting:  Next Steps

Looking for some advice on what to do next when it comes to improving my 
expedition type set up.


Background:
I picked up my Technician and General license at Dayton in 2015.  Last fall I 
decided to combine my love of off roading (rock crawling) with amateur radio 
and take part in the January VHF/UHF contest.  I decided to enter the FM only 
category since it does not require a high level of sophistication or a huge 
investment in equipment.  Living in Northern Virginia I am near several large 
population centers.  Since FM range is LOS dependent and altitude is king I 
felt I might just have a big advantage in setting up my Jeep Cherokee to carry 
my radio gear up to 4,000+ feet in the dead of winter to either of two 
locations that would give me access to between 12-15 grid squares and hopefully 
800-1200 points.  The big snow fall put 6-8 foot drifts on the trails I needed 
to use, I am OK with 3-4 feet but 6-8 feet just wasnt doable so I ended up in a 
highly compromised location with mountain tops 1000' above me on 3 sides. I did 
get a couple of 150+ mile FM contacts but I got totally sh
 ut out of major population centers. As a result I got "smoked", around 100 
QSO's but only 60 points worth of contest contacts.  June, September and 
especially next January beckon.


Current Set Up:
15 foot fold over mast mounted through roof that drops into a manual rotator 
attached to the cargo floor of the Cherokee.  Mast cross arm is 15 feet above 
the roof, 23 feet above ground level.  Cross arm support a Cushcraft A14810s 
for 2 meters, a Cushcraft A44911S for 70cm and a Diamond X-30A omni.  All 
antenna cabling is LMR-400.  Connectors are UHF.  Cables run inside the mast 
down into the vehicle.  Radio is a Yaesu FT-8800 (50W 2M, 35W 70cm) that is 
mast mounted inside the vehicle with the remote head on a work table for 
logging (all manual).  I was using a diplexer between the two Yagi's and a two 
position switch to select between the Yagi's and omni.  I have since deleted 
the diplexer due to losses and run the cables to an Alpha Delta 4 position 
switch.  I am adding 220MHz using an older Kenwood radio (35W 1.25M) and 
switching out the dual band monopole for a triband omni of higher gain.  I will 
probably modify the mast cross arm to add a 220MHz Yagi once I settle on a
  design for the cross arm and antenna locations that dont have interfering 
capture areas and decide if I want to phase in a second set of Yagi's.  I have 
spent quite a bit of time minimizing cable and connector losses (under a dB on 
all bands from radio to antenna connector and minimizing VSWR which is 1.2 or 
less at 144 & 220 and under 1.5 at 440.


Here is is link to some photo's of the set up if you are interested:  
http://s49.photobucket.com/user/nosigma/library/XJ%20Radio%20Rig?sort=3&page=1


Questions:
Where should I go next for the next performance improvement for this FM only 
system?
Phase a second Yagi at each band for 2-3 dB?  Add an RX pre amp on each band 
(if you cant hear them you cant work them)? Add a TX amplifier to get up to the 
allowed 100W for 3-4 dB?  If the answer is amps then should I mount them at the 
antenna for minimum loss or are my losses low enough at under 1dB that its not 
worth the extra set up hassle?  If the answer is RX/TX amps can I get away 
without having to run a sequencer? Am I missing something more basic, like the 
radio or driving up to north eastern PA for the next contest?   A KX3, 
transverters and amplifiers are NOT in the budget, maybe someday but I want to 
keep this as basic and as simple as possible for now.


Looking for some suggestions.


73
KM4KMU
John
_______________________________________________
VHFcontesting mailing list
VHFcontesting@contesting.com
http://lists.contesting.com/mailman/listinfo/vhfcontesting

_______________________________________________
VHFcontesting mailing list
VHFcontesting@contesting.com
http://lists.contesting.com/mailman/listinfo/vhfcontesting

<Prev in Thread] Current Thread [Next in Thread>