[W6YRA] Reminder: Club net Wednesday at 6PM (& shack tour)

[Ryan Caron]

We verified that the repeater has been hooked up to the stacked dipoles, and with the analyzer determined the SWR 2:1 bandwidth is about 20MHz from 443-460MHz, with the sweet spot being 1.3:1 @ 453.5MHz. A good set up for our repeater. 

I also zip tied some of the coaxes out of the way of the dipoles, so I expect a bit better performance now. 

I'm convinced that the higher SWR we're seeing is from corrosion. I'll confirm this with one of the mobiles & a meter on Saturday.

In other news, N6MQS is apparently off the air, at least temporarily, so we have the channel to ourselves.

----- Original Message -----
From: "Ryan Caron" <rcaron at igpp.ucla.edu>
To: monty9 at msn.com, jkhoury at it.ucla.edu, w6yra at lists.igpp.ucla.edu
Sent: Thursday, May 15, 2014 12:20:22 PM
Subject: Re: [W6YRA] Reminder: Club net Wednesday at 6PM (& shack tour)

It is worse than that though. Two needle meters, and a brand new jumper 
cable, and the results are the same - nearly 2:1. The MFJ analyzer just 
doesn't have enough output power to overcome the coax and/or corrosion 
losses, so appears better than it is.

Best to take the MFJ to the roof and plug in directly.

On 5/15/2014 12:09 PM, Jim Montague wrote:
> The swr on the 440 ant is abt 1.1-1 at the high end of the 448mhz band.
> Be very carefull abt changing antennas. We had a complaint many years
> ago that our station was causing a problem with another repeater site.
> We redirected the antenna to the south to avoid conflict. In order to
> get the match better the antenna itself must be adjusted.
> Monty
> NI6J
>
>  > From: jkhoury at it.ucla.edu
>  > To: rcaron at igpp.ucla.edu; w6yra at lists.igpp.ucla.edu
>  > Date: Thu, 15 May 2014 17:48:43 +0000
>  > Subject: Re: [W6YRA] Reminder: Club net Wednesday at 6PM (& shack tour)
>  >
>  > I can hear it okay on an HT and I can key it, but juuuuust barely - if I
>  > stand in the right place. I can easily use WA6QAG (on top of the VA
>  > Hospital) from home, so I know it shouldn¹t be too terribly hard.
>  >
>  > In a month or two I¹m going to put my base antenna back up and then I
>  > should be in easily.
>  >
>  > --
>  > Jeff R. Khoury
>  > Manager, Platform Support
>  > UCLA Information Technology Services (ITS)
>  > 741 Charles E. Young Drive South
>  > CSB1 2nd Floor
>  > Los Angeles, CA 90095
>  > P: 310.825.9594
>  >
>  >
>  >
>  > On 5/15/14, 10:40 AM, "Ryan Caron" <rcaron at igpp.ucla.edu> wrote:
>  >
>  > >
>  > >Jeff, attached is a path plot and Google Earth of field strength to your
>  > >approximate QTH. It is certainly a deep shadow, but I'm curious if you
>  > >can hear the repeater from there, just not hit it. To clear terrain
>  > >obstructions, the campus antenna would have to be raised from 120ft AGL
>  > >to 608 AGL (and this is just line of sight). That's quite a tower!
>  > >
>  >
>  >
>  > _______________________________________________
>  > W6YRA mailing list
>  > W6YRA at lists.igpp.ucla.edu
>  > http://lists.igpp.ucla.edu/mailman/listinfo/w6yra

-- 
73,
Ryan
NX1U