USING 25G base for 45G tower

Thu Aug 25 09:23:20 EDT 1994

This thread about the peir pin got me thinking.  I have a 90' 25g tower up
and would eventually like to replace it with 45G.  First thought is to
have a back hoe dig out the 25g concrete and re-pour for the 45g base.

I used the 25g short base section in my concrete. Its 3.5' long.

Since a pin is enough to hold 45G to specs, I was thinking on manufacturing
a reducer plate so I could mount 45g on the 25g base.  Please note the 25G
base was dug and poured to 45g specs.  This would be a triangle plate with
stubs on the bottom to fit into the 25g and legs on the section, and stubs on
the top to fit into the 45g straight section.

I am not an engineer, and its probably not the right thing to do, but I
thought I would ask the multitude.

73,
Rich - WB5M - RTHORNE at VNET.IBM.COM

>From Michael Owen <MOWE at SLUMUS.STLAWU.EDU>  Thu Aug 25 13:26:08 1994
From: Michael Owen <MOWE at SLUMUS.STLAWU.EDU> (Michael Owen)
Date: Thu, 25 Aug 94 08:26:08 EDT
Subject: I'm starting a pool...
Message-ID: <25AUG94.09110683.0023.MUSIC at MUSIC.STLAWU.EDU>

The date for the 1996 ARRL National Convention has been announced...
the 2nd weekend of September.  Gee... that coincides with *another*
VHF contest.  What a surprise!

Who wants to wager whether the contest gets bumped? (he asked, through
tightly gritted teeth.)

MRO

************************************************************************
Michael R. Owen, Ph.D.                        a.k.a.: W9IP
Department of Geology                         Northern Lights Software
St. Lawrence University                       Star Route, Box 60
Canton, NY  13617                             Canton, NY  13617
(315) 379-5975             -  voice  -        (315) 379-0161 (6-9pm)
e-mail: MOWE at SLUMUS            FAX   -        (315) 379-5804
************************************************************************

>From Dravland, Todd" <ToddD at dci.state.sd.us  Thu Aug 25 16:26:00 1994
From: Dravland, Todd" <ToddD at dci.state.sd.us (Dravland, Todd)
Date: Thu, 25 Aug 94 08:26:00 PDT
Subject: NAQP SSB score
Message-ID: <2E5CB809 at sdmailgw.state.sd.us>

Call: WD0T                    Location: SD

Category: Single Op All Band       Mode:SSB  

Power: 100w

Hours of Op: 0 hrs. 30 mins. ( 2138-- 2208)

160  0    0              No ant. , too early anyhow
80   0    0    Broken dipole,  ditto
40   6    5    2 ele  @ 45'
20   24   10   Tribander  @ 40' , Best band!
15   0    0    ditto,  only heard South America
10   0    0    ditto, nothing heard
 ----------------------------------
     30   15  =   450 pts.

Team: Sultans of Shwing NAQP SSB Team #4

Notes:

30 minutes of S&P between end of couples Golf tournament and
going out to eat with friends.  Almost sprint like activity to get all 
equipment
connected, operational, then torn down.  But, worth it!!  Best sig. on 20m 
 W1OP, best on 40m K4XU.  Best name heard OJ.  Winding down the tournament 
golf season in another month, then on to CONTEST SEASON, YES YES!!

Todd, WD0T

ToddD at DCI.STATE.SD.US    

>From sellington" <sellington at mail.ssec.wisc.edu  Thu Aug 25 09:39:06 1994
From: sellington" <sellington at mail.ssec.wisc.edu (sellington)
Date: 25 Aug 94 08:39:06 U
Subject: Radials and Aluminum Wire

Steve Harrison writes:

Two days later, I sadly concluded, after observing that the bandwidth of 
the quad was greater than 500 kHz before the SWR exceeded 1.5:1, that the 
aluminum wire was doing a better job of heating the local environment 
than exciting the ionosphere. Dragged out the ohmmeter and measured a couple of
ohms.

***************
There must have been something else going on.  Even if the RF resistance
was considerably higher than the DC resistance, like a factor of 2, the
loss would only have been a fraction of a dB.  The RF resistance of 
aluminum wire is only 23 percent greater than that of copper.

The only real problem with aluminum wire is what happens to it when it's
in contact with the ground.

Scott  K9MA
sellington at mail.ssec.wisc.edu

>From Peter G. Smith" <n4zr at netcom.com  Thu Aug 25 14:45:55 1994
From: Peter G. Smith" <n4zr at netcom.com (Peter G. Smith)
Date: Thu, 25 Aug 1994 06:45:55 -0700 (PDT)
Subject: more on elevated radials
Message-ID: <Pine.3.89.9408250622.A4268-0100000 at netcom>

Isn't there another possible explanation for the reduced bandwidth when
elevated -- that resistive ground losses in parallel with the antenna
input impedance gave you the illusion of bandwidth. 

73, Pete                                       
N4ZR at netcom.com

>From H. Ward Silver" <hwardsil at seattleu.edu  Thu Aug 25 15:28:04 1994
From: H. Ward Silver" <hwardsil at seattleu.edu (H. Ward Silver)
Date: Thu, 25 Aug 1994 07:28:04 -0700 (PDT)
Subject: Multi-Contesting
Message-ID: <Pine.3.07.9408250750.B4792-a100000 at bach>

So, let's see, you've now created the following categories:

Single-Single: one op, one contest
Single-Multi: one op, multiple contests
Multi-Single-Single: multiple ops, one tx, one contest
Multi-Single-Multi: multiple ops, one tx, multiple contests
and the all powerful
Multi-Multi-Multi: multiple ops, multiple tx, multiple contests

Let's all rassle about whether you can have more than one signal per band
if the different signals are calling CQ for different contests.  What
happens when you get a CQP reply to your NAQP CQ?  Ow!  My head!  What
happens when a MMM works an MMM?  Sorta like QTC in WAE, but
multi-dimensional.

"Help, Mr. Wizard!  I don't want to be a contest op any more!"

And then there's the Assisted variants...makes Single-Single sound so...
pedestrian, so...adagio!

:-)

73, Ward N0AX