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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