[TowerTalk] Very old DX Engineering Stack match info wanted

[Mike Smith VE9AA]

Update: I don't know how I missed this before but I finally found a very
similar unit that was for sale some years back in w7. 

http://www.eham.net/classifieds/detail/330437

 

I see by the sale ad it needs 2 x 1/4wl 75Ohm matching sections of coax.

Mine does not have the rotary knob numbered 1-2-3-4, nor do I think the
remote part has an N-connector for input (I have to dig it out of the shed
to be 100% certain)

*(I am not sure what the 4th position would even be for?)

 

So, any ideas how I can use this to phase 2 verticals to give me perhaps 3
different patterns ?

 

Anybody even seen or used one of these before?

 

TNX

 

Mike

 

Mike, Coreen & Corey

Keswick Ridge, NB

 

From: Mike Smith VE9AA [mailto:ve9aa at nbnet.nb.ca] 
Sent: November 15, 2016 10:55 AM
To: 'towertalk at contesting.com'
Subject: 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