I don't know about the rest of you, but it's not going to embassess me one bit
to send 5NN. Buckmaster will supply the missing grid square, so all I have to do
is get the call.
|Why in the world couldn't the report have been something that if you missed it,
the only way to get it is to listen to the station again. Even a sequential nr
would be better than this.
Best
Ed
-------------------------------------
Name: ed sleight
E-mail: k4sb@avana.net
Time: 5:01:11 PM
This message was sent by Chameleon
-------------------------------------
>From thompson@mindspring.com (David L. Thompson) Fri Aug 23 22:13:41 1996
From: thompson@mindspring.com (David L. Thompson) (David L. Thompson)
Subject: 40/80 Phased verticals
Message-ID: <199608232202.SAA04376@itchy.mindspring.com>
> ... It would be nice to keep the HF2V, add another
>> and have a 2 element phased array on 80/40. [...]
>> I could easily feed this
>> multiband system in phase just by cutting the coax to equal lengths...
>
>Don, you might call the Butternut Company (don't have their
>phone number handy, but check any recent ham mag) and ask for
>their free Technical Note 100 (T-100). This is just a one sheet of
>some notes on this subject on this very topic. Also see the
>Low Band DXing book by ON4UN and the recent ARRL Antenna Book.
Gang,
Another source for phasing two verticals is a tech sheet published by
Hy-Gain. It gives practical advice on phasing, nice layouts, and all the
specs you will need.
Call Hy-Gain and ask for the vertical phasing spec sheet..this came with
every vertical they made several years ago. Bet K7LXC has some too!
Dave K4JRB
>
>I have an HF6VX in the back yard which has been begging me to
>install another and phase the two... I was figuring on just feeding
>them either in phase, or relay selecting a delay line. Naturally
>this single delay line would cause different patterns for 40 vs. 80,
>but you could select the line length to be a compromise which would
>do something useful for either case. The ARRL Antenna Book has two
>pages of graphs of vertical spacings and phase delays.
>
>Your 180 degree delay line on 40 becomes about 90 degrees on 80...
>Your 3/4 wave spacing on 40 becomes 3/8 wave spacing on 80...
>
>I think feeding in phase should work easily and result in some gain.
>When attempting to add phase delays, someone can correct me if
>I'm wrong, but my sense is that if you don't get perfect phasing,
>your front-back ratios suffer but you still get some useful forward
>gain (well going forward in *some* direction...). From a domestic
>contesting standpoint, from here in the middle of the USA, I don't see as
>I care much about front-back-side...that helps my signal get weaker
>somewhere...I need to be LOUDER somewhere (anywhere really)...
>hence if I can get some forward gain then it's a win. Thus I'm
>inclined to try it and see what happens. Let me know what you decide
>on doing.
>
>Last November I tried using the "tuned guy" approach to add some
>directivity to my HF6VX per some articles in the ARRL Antenna Compendium.
>The article assumed you'd be using a tower as your vertical, and
>you tune a grounded guy to form a reflector. I tied a #14 wire
>to a grounded loading coil and then to the top of the HF6VX in some 40 meter
>experiments. I could switch the "guy" to ground from the shack via
>12VDC relay. I didn't have time to run extensive tests, but never
>noticed any significant nulls or gains on receive. Wonder if anyone
>has successfully used the tuned guy approach on a non-tower installation.
>
>Regarding the visual impacts... you could do what I do and get
>something like the Lance Johnson Engineering GP-1 radial bus:
>you can then tie all your radials to the GP-1, and then the HFnV
>attaches to the GP-1 with just 3 screws. My HF6VX is only up when
>I am going to be operating...takes about 3 minutes to plop it into
>the GP-1 and install...the buried radials and coax are always
>installed and ready. This scheme saves on CC&R problems, lightning
>problems, etc. When I get the second vertical, I'll call the
>system the "stealth phased array antenna system". Sounds like
>a DoD project, eh?
>
>For more info on the GP-1 see: http://www.QTH.com/lowband
>
>Anyhow, have fun!
>73,
>Dave Palmer, N6KL/0
>Boulder * Niwot * Longmont Colorado
>
>* I'd rather be surfing the ionosphere! *
>
>
|