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Mobile Antenna Springs
For Amateur,
Commercial, and Military HF, Robotic & UGV VHF / UHF Masts
General Description
The Mark-5 is a commercial grade antenna spring of polished,
all-stainless construction, except for the internal tinned-copper braid,
which bonds its end pieces. The Mark-5 is 2" in diameter by just under 5"
long, with ham-standard 3/8-24 threaded hole in each end.
The Mark-6 is also all-stainless, except for the internal tinned-copper
braid, which bonds its end pieces. It is an exceptionally heavy-duty
spring intended for very large whips and remotely tuned antennas. Owing to
strength requirements, it is threaded 1/2-13 on both ends. Additionally,
these threads are equipped with locking set screws.
Contact factory for
variations to accommodate thru-coaxial cable, etc.
Click to enlarge
|
SPECIFICATIONS |
MK-5 |
MK-6 |
| SIZE: |
4.65" High |
6.9" High |
| WEIGHT: |
2.1 lb. |
4.875 lb. |
| TORQUE: |
9 ft. lbs. |
39 ft. lbs. |
| (To
achieve 10-degree deflection, length measured from bottom of
spring to perpendicular load at 3 ft.) |
|
THREADS: |
3/8-24 |
1/2-13 |
|
Pricing Info,
FOB Tucson, AZ |
$89.00 |
$225.00 |
Mark-5 Mobile Antenna Spring Variants
Mark-5 UTH-UTH:
available July 2009
Mark-5 UTH-MSA:
available July 2009
Mark-5 Custom:
Contact CAL-AV
Mark-6 Mobile Antenna Spring Variants
(Click photos to enlarge.)
|
Mark-6 with UTH each end on left; Mark-6 with UTH on bottom,
Mast Socket on top to right. 1” diameter mast section with seven
RG-303/U cables in sleeve, illustrates through-hole capability. |
Mark-6 with mast in socket above, UTH below, mounted on a
SINCGARS adapter plate, which is in turn mounted on a vehicular
SINCGARS mount. |
|
Underside of vehicular SINCGARS antenna mount and underside of
SINCGARS to Universal Through-Hole (UTH) Adaptor Plate, showing
safety-wired 1/4-28 bolts. |
Close-up of safety-wired 1/4-28 bolts holding Mark-6 UTH base to
SINCGARS adapter plate. |
Mark-6 Variants and Accessories
| Mark-6–1, 3/8-24 Thread each end,
internal braid |
$ Call w/qty |
| Mark-6–2, 1/2-13 Thread bottom, 3/8-24
thread top, internal braid |
$ Call w/qty |
| Mark-6–3, 5/8-11 Thread each end,
internal braid |
$ Call w/qty |
| Mark-6–UTH–UTH, Universal
Through-Hole Mounting each end |
$245 |
Mark-6–UTH–MSA, Universal
Through-Hole Mounting on bottom,
Mast Socket “A” on top. |
$265 |
|
Adapter Plates
SINCGARS Mount (6” diameter, nominal, 4 holes, 0.438 dia., 90 degrees
apart on 4.5-inch bolt circle), ¼” Thick 6061-T6 Aluminum, Alodined, ready
to prime and paint:
|
| APS-0.5: .250-AL, ½” hole at
center to mount standard Mark-6 |
$40 |
APS-UTH: .250-AL, to mount
Mark-6 UTH pattern spring end
NOTE: UTH is a 0.750 through-hole, surrounded by a pattern of
6 clearance holes for 0.25” bolt, every 60 degrees on a 0.830
bolt-circle radius.
|
$50 |
| APS-BLANK: .250-AL, BLANK,
with 0.125 pilot hole at center |
$40 |
| Mark-6–UTH: UTH, Universal
Through-Hole Mounting each end |
$245 |
| Mark-6–UTH–MSA: Universal
Through-Hole Mounting on bottom, Mast Socket “A” on top. |
$265 |
Also available: Pairing plates; allows pairing two springs side-by-side to
double spring constant fore-and-aft, while virtually eliminating side
motion. Stainless steel. Intended for mounting on a trailer hitch. Contact
factory for details.
Information Sheets
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CAL-AV LABS, INC.
2440 N. Coyote Dr, STE 116
Tucson, AZ 85745 USA
info@cal-av.com
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