[AK-VHF] 23cm and 33cm

[Edward R Cole]

No 900 repeaters (known).  Problem is input frequency.  Most FM users 
are running 927.50 FM simplex.  Repeater would be near that (say 
927.65).  Most of these radios are programmed for 25 MHz duplex split 
which put 927.65 repeater input at 902.65 right smack in the 
weak-signal subband where KL6M is trying to operate eme.  Repeater 
users would interfere with him.

1.2 GHz repeater would be somewhere in 1294 MHz suband which 
hopefully would not spatter up into 1296.000-1296.100 eme band where 
there are at least two of us operating with extremely sensitive 
receivers.  I do not have a 1294FM radio so would not use such a repeater.

432 and above are affected by tree foliage so one needs about 50-foot 
at min height for antennas.  MY 2m-eme, 432, 927.50 and 1296 yagis 
are clustered at 52 foot which looks over the top of my trees.  222 
is at 60-foot and 6m is at 33-foot.  My eme dish is 18-foot at top 
edge so typically has to elevate to above ten degrees to see clear 
sky (thus only usable for eme).  I've tried a 1296 shot using the 
dish with KL6M with no signals heard (too much ground clutter and trees).

A vertical fed with RG-213 on these bands makes a good dummy load as 
not much RF will get radiated (Loss= 9.3 dB per 100-foot).  You need 
gain (preferably directional) up in the clear.  Alternative is to run 
portable (mobile) from a high place (like Mt. Baldy parking lot at 
2200-foot or 1100-foot from Diamond Ridge above Homer).

Although this was on 2m-SSB, I worked KL7FZ with 35w into 3-element 
yagi over 212 mile path (from top of 3300 foot Mt.Bede to Meadow Lake 
area (Big Lake).  I was fortunate to be employed to do work on a 
repeater at the site and company paid the $1150/hour helicopter ride 
(30 miles south of Homer).

Most mw weak-signal operation work from high places in portable.  My 
only 10-GHz shot in AK was across Turnagain Arm from Hope to KL7FZ at 
Beluga Pt. (about 5-miles I was only transmitting 10mw).  I'm certain 
that 10-GHz will work from Diamond Ridge to Mt. Baldy parking lot 
(about 150 miles).

Keep thinking!

73, Ed - KL7UW

At 08:13 AM 6/14/2019, Brandon Clark wrote:
>I doubt there is much activity on those bands up here, except maybe for
>moonbounce. I think the Alaska Repeaters website only lists one or two
>repeaters on those bands. I don't remember hearing a lot of activity on the
>Tuesday simplex nets either, although there are a few stations out there.
>
>I haven't been up here very long, but it seems like anything higher than 2m
>really struggles with all the trees and lack of truly high sites for
>repeaters.
>Brandon
>
>On Thu, Jun 13, 2019, 18:00 Tom Elmore <tom at telmore.com> wrote:
>
> > Now that I have 6m, 2m, 1.25m and 70cm SSB stations built I am wondering is
> > 23cm or 33cm more in use here in southcentral?
> >
> >
> >
> > Thank You
> >
> >
> >
> > Tom Elmore   KA1NVZ
> >
> > Anchorage, Alaska
> >
> >
> >
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73, Ed - KL7UW
   http://www.kl7uw.com
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