Hy-Gain DB-1217 HGN-DB-

308 Industrial Park Road
DB-1217
Starkville, MS 39759 USA
Ph:
(662) 323-9538 FAX: (662) 323-6551
INSTRUCTION MANUAL
General Description
The Hy-Gain DB-1217 is a 7 element, 2 band beam antenna designed for operation on the 12 and 17 meter amateur bands. The DB-1217 uses Hy-Gain's unique Para-Sleeve driven element, monoband reflectors and directors, and Hy-Gain's rugged boom-to-mast bracket. The DB-1217 will mount on a standard 2" O.D. mast and can be rotated with Hy-Gain's CD-4511 or HAM-IV/V rotators. All hardware is stainless steel.
Hy-Gain's Para-Sleeve* driven element and the monoband parasitics allow 3 element monobander performance on each of the two bands! In addition, the DB-1217 includes assembly dimensions for either 12/17 meters or 10/ 15 meters! The DB-1217 is designed to survive 115 MPH winds with no ice and 80 MPH winds with
0.25 inch radial ice! This antenna also features a 4 piece boom and a 49" (1.24m) shipping container - ideal for DXpeditions.
*References: U.S. Patent Number 4,604,628. "The Open-Sleeve Antenna", CQ Ma gazine, Vol. 39, No. 8, August 1983, Pages 13-19. The ARRL Antenna Book, 16th Edition and later, "The Open-Sleeve Antenna", Multiband Antennas Chapter.
Preparation for Assembl
y
FOR OUR OVERSEAS C USTOMERS: T he United States uses American units of measurement. Please see page 8 of this manual for American-to-Metric conversion. Most illustrations include both American and Metric dimensions.
When unpacking your antenna, check inside of all tubing for smaller tubes. To conserve space and protect parts, these parts are packed this way. Check all parts against the parts list to ensure none are missing.
Choose a large, clear area to assemble your 1313­1217 antenna. The area must be at least 14' x 30' (4.3 m x 9 m). You may wish to use a temporar y mast to support the boom during assembly.
All tubing supplied with the D13- 1217 telescopes together. Make all measurements to the given dimensions, plus or minus no more than 1/8 inch (3 mm).
Assemble the two cast aluminum brackets (Item
1) on your temporary mast about 4 feet (1 m) above ground. Secure the two brackets together using the two 5/16"-18 x 3" bolts, nuts and lockwashers. Tighten these two bolts evenly until the brackets are snug.
Attach the boom assembly to these two brackets using the four 5/16"-18 x _5" bolts, nuts and lockwashers (Items 35, 38 and 39). Tighten these four bolts just enough to hold the weight of the antenna.
Assemble the remaining two boom sections (Item
7) to the ends of the assembled boom using 1/4"­20 x 2 1/2" screws, nuts, and lockwashers. Tighten securely.
Assembly of the Boom
Select the boom-to-mast clamps (Items 5 and 6). Loosely assemble them on the drilled ends of the two boom sections (Item 8) using the 1/4"-20 x 3/4" bolts, 1/4" nuts and lockwashers (Items 41, 44 and 45). Secure the boom to the bracket using the two 5/16"-18 x 2 3/4" screws, nuts and lockwashers (Items 37, 38 and 39). Tighten these six bolts securely.
Figure 1 Boom-to-Mast
Element-to-Boom Brackets
p
y
There are three sizes of element-to-boom brackets supplied. The largest (Item 4) has a 1 1/2" I.D., and is used only on the 17m driven element. The medium-sized brackets (Item 3) have a 1 1/4" I.D., and are used on the 17m reflector and director elements. The smallest brackets (Item
11) have a 7/8" I.D., and are used on the all of the 12m elements.
Assemble the brackets as shown in Figure 2 and position them on the boom as shown in Figure 8. It is easier to assemble the brackets on the boom at the correct location, rather than try to slide them on the boom. If you are going to leave this assembly unattended for more than 15 minutes, we suggest that you tighten the eight (8) bolts on each bracket, so that they do not vibrate off. Do not tighten the two (2) anchor bolts (Item 40) until the elements are installed and aligned.
Figure 2 Element-to-Boom
Tubing Clam
Select the proper size tubing clamps as shown in Figure 3. When installing the clamps, place the clamp near the tube end with the top of the clamp over the slot in the tube as shown. After adjustment of the tubing lengths, tighten the clamp with a 5/16 inch (8 mm) nut driver until the tubing will not twist or telescope. DO NOT overtighten!
Figure 3 Tubing Clamp
Assembl
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