Hi Wayne and thanks for the reply. One complication is that I have already cut
the lines to length and have connectors on both ends. I would have to cut them
off one end in order to slip them through a hose. And the hose, I guess, would
have to be pretty large to fit 4 runs of RG-8. I guess cutting off the
connectors is a small price to pay if this works and keeps the loop in a nice
elliptical shape as the mast rotates. I wonder what kind of hose might work
well here? Also, how long should that loop be? And, how far above the tower top
should the loop be fastened to the mast?
Gedas, W8BYA
----- Original Message -----
From: "Wayne Kline" <w3ea@hotmail.com>
To: "Mike Smith VE9AA" <ve9aa@nbnet.nb.ca>, towertalk@contesting.com
Sent: Tuesday, November 15, 2016 8:52:15 PM
Subject: Re: [TowerTalk] Very old DX Engineering Stack match info wanted
Hi Mike
The boxes your talking about are the "OLD DXEngineering "
I had three of the stack boxes and one 4 sq box for 80 meters.
There gone ( lightning HIT ) But I do have a instruction manual.
DX Engineering inc.
18 Spalding ave Brownsville Oregon
It's called 0 Phase Box
The 1/4 wave phasing lines at made from good quality RG-11 ( 75 ohm coax) (
246/ Freq. in MHZ X velocity factor of line = line length )
Upper Yagi Port #1
Lower Yagi Port #2
Phase line Port # 3 to # 5 Port #4 to # 6 ( 75 ohm phase line )
Port #7 input
Wayne W3EA
________________________________
From: TowerTalk <towertalk-bounces@contesting.com> on behalf of Mike Smith
VE9AA <ve9aa@nbnet.nb.ca>
Sent: Tuesday, November 15, 2016 9:55 AM
To: towertalk@contesting.com
Subject: [TowerTalk] Very old DX Engineering Stack match info wanted
I have a very old DX Engineering Yagi Stacking control box I am trying to
find some info on. I think it's late 80's/early 90's vintage.
I believe it was acquired from a W7 6m Dxer friend back in the mid 90's.
(but it was already somewhat old then). I don't know the history of DX
Engineering, but did it once reside on the west coast by different folks>?
The grey faced, black cabinet control box has a rotary switch for settings
UPPER/LOWER/STACK (with matching LED's) and a simple on/off toggle.
I am nearly certain it uses only 3 wires for control, though the terminal
strip has more than 3 connections.
I used it on my 6m stack before I moved to my current location in 2004, so I
don't recall what's needed at the tower end for phasing/matching coax
cables.
Ie: Is it 50Ohm? 75Ohm? 1/2wl? 1/4wl? Which connections? I have to redo
the remote part as I took it out of service due to a faulty relay or
connections, best as I recall (Hey, I don't throw much away, hi)
IIRC I might have had another remote switch to put them both out of phase,
but don't know where that is. I don't see anything in the box to be able to
do that, so I presume I did it with an external remote switch added to this
to perform that function. (as an aside, I seldom used BOP..wouldn't waste my
time if I ever stack 2m 6m yagis again, hi!)
***Anyways, my intention is to now reuse this to perhaps phase 2 verticals
for a BS/EF or 2 other directions array.
I was thinking 2 x 1/4WL verticals, spaced 1/2wl apart, with a parasitic
reflector between them, giving me (perhaps_ NE, SW and one other dual
direction pattern , depending on what I can do with a phasing line.
Haven't decided on the band yet..maybe 10m or one of the WARC bands.
TNX,
Mike VE9AA
Mike, Coreen & Corey
Keswick Ridge, NB
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