AD5VO
- Jack
Lucas, TX
Back to
Out-of-State AM Page
|
|
||
|
|
|
The
AM transmitter lineup taking shape at AD5VO. At left is a Collins
Radio 820 D1 being converted to HF. The two RCA BT-250M's are
also undergoing renovation and conversion. The center racks contain a
number of vintage broadcast-quality modulation monitors and audio
processors. |
|
|
||
|
|
The shack itself is a custom-built office/lab/operating center detached from the main house but built in an identical style. This photo was taken in the final stages of construction. |
|
|
|
||
 |
The
multi-band vertical at AD5VO. Although designed for efficient
160-meter operation, this antenna will also cover the 75/80 and 40
meter bands through the use of switchable matching and loading networks
and components. |
|
|
|
||
 |
The
vertical antenna and crane truck used for installation. The
60-foot, Rohn 25 tower is topped with a switchable capacitive-loading
structure and is guyed at two levels with high-strength Phillystran. |
|
|
|
||
 |
The
capacitive-loading, "top hat" structure during installation. It
is insulated from the tower and switched by an RF contactor in the grey
box immediately below it. The outrigger arms are each 6 feet
long. The balls on the ends of the arms and the one in the center
of the mounting plate suppress corona discharge for quiet receive
operation during periods of high thunderstorm activity. |
|
|
|
||
 |
The
insulated antenna base allows for simple, series-fed operation.
As installation progresses, a system of 40, 60-foot ground radials will
be installed as well as an array of ground rods and a 'doghouse' for
the multi-band, impedance-matching network. |
|
|
|
||
