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Butternut BUT-HF9V Manual

Nine-band vertical antenna
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Butternut
80/40/30/20/15/17/12/10/6 Meters
Nine-Band
Vertical Antenna
© Butternut 2016
1200 Southeast Ave. - Tallmadge, OH 44278 USA
Phone: (800) 777-0703 ∙ Fax: (330) 572-3279
Tech Support and International: (330) 572-3200
Downloaded from www.g7syw.com
HF9V
®
BUT-HF9V
BUT-HF9V-INS-Revision 1b
Artists rendition
of an installation
www.g7syw.com

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  • Page 1 Butternut HF9V ® 80/40/30/20/15/17/12/10/6 Meters Nine-Band Vertical Antenna BUT-HF9V BUT-HF9V-INS-Revision 1b © Butternut 2016 Artists rendition 1200 Southeast Ave. - Tallmadge, OH 44278 USA of an installation Phone: (800) 777-0703 ∙ Fax: (330) 572-3279 Tech Support and International: (330) 572-3200...

  • Page 2: Overhead Power Line Safety

    Downloaded from www.g7syw.com Introduction ® The classic Butternut HF9V Nine-band vertical antenna operates on 75/80, 40, 30, 20, 17, 12, 15, 10 and 6 meters. Designed with corrosion-resistant aluminum tubing, 26 feet tall and only a 2.2 ft wind load, this antenna is very durable and attractive.

  • Page 3: Theory Of Operation

    Downloaded from www.g7syw.com shock. Keep your distance! As a suggestion, remember the 10-foot rule; when carrying and using ladders and other long tools, keep them at least 10 feet away from all overhead lines - including any lines from the power pole to your home. Theory of Operation The first L/C circuit generates enough reactance to bring the whole HF9V to resonance on 80 meters allowing it to act as an electrical 1/4-wavelength radiator.

  • Page 4: Tools Required

    Downloaded from www.g7syw.com Tools Required Straight Slot Screwdriver Phillips Head Screwdriver 1/4” Nut Driver or socket set 11/32” Nut Driver or socket set 3/8” Nut Driver or socket set Tape measure Pencil NOTE: Please read all instructions thoroughly before proceeding to the assembly. There are parts made from fiberglass in this kit.

  • Page 5: Suggested Parts Not Included

    Butternut offers a variety of radial systems for installing with vertical antennas. Radial Wire Kits and Components - There are optional Butternut Radial Wire Kits available. Guying Kit for Vertical Antennas - Some vertical antenna manufacturers indicate their antennas do not need guying.

  • Page 6: Radial System

    Downloaded from www.g7syw.com Mounting Tube (A) Installation When the bottom tube with insulator (A) is ground mounted, it should be protected against corrosion if placed in concrete, damp acidic or alkaline soil. Asphalt roofing compound, polyurethane varnish or other sealant that protects against moisture may be used. Concrete may be used in areas of high winds for greater strength, in which case the post may be twisted slightly during setting for easy removal later.
  • Page 7 An article describing this process is available on the Butternut website. Radials can also be buried just under the surface (approximately 1” - anything deeper and you will start losing effectiveness) by using a power edger to make a slit in the soil.

  • Page 8: Aluminum Tubing Information

    Radial Plate should be made to ensure a good RF connection. This is the same stainless steel Radial Plate that is used on all Butternut vertical antennas and has proven itself to be an enhancement that really works for vertical antenna systems.
  • Page 9 Downloaded from www.g7syw.com 2. Clean the inside of the aluminum tubing to clear out any dirt or foreign material that would cause the aluminum tubing sections to bind during assembly. Do not use any type of oil or general lubricant between the aluminum tubing sections. Oils or general lubricants can cause poor electrical connections for radio frequencies.
  • Page 10 Downloaded from www.g7syw.com 1. Check to be sure that no parts are missing (see assembled antenna pictorial page) 2. If the antenna is to be installed at ground level, install mounting tube (A) in a hole approximately 21 inches deep so the upper end of the fiber rod insulator (feedpoint connection) is approximately 3 inches or less above ground level.
  • Page 11 Downloaded from www.g7syw.com 4. From the center of the insulator, measure downward to a point that is 13” along tube (B) and make a pencil mark. 5. From the center of the insulator, measure upward to a point that is 9-3/8" along tube (B1) and make a pencil mark.
  • Page 12 Downloaded from www.g7syw.com 9. Stretch the 80 meter (larger) coil on the coil assembly 80/40 meter (C) until the bottom of the lower clamp is even with the lower mark. Secure with a #10 flat washer, lock washer and wing nut.
  • Page 13 Downloaded from www.g7syw.com 15. Insert the un-slotted end of tube (E) into tube (B1) and secure with a # 8 x 1-1/2" screw, lock washer and hex nut. 16. Locate coil support tube 30 meter (O) and measure to a point 9-7/8” down from the end of the plastic insulator.
  • Page 14 Downloaded from www.g7syw.com 22. Slide the remaining clamp from the above assembly over tube (E) and position it so the coil support tube L bracket (O1) is even with fourth turn, counting from the top of the 40 meter coil on the coil assembly 80/40 meter (C) and tighten the hex nut.
  • Page 15 Downloaded from www.g7syw.com Steps 31 through 48 are for installing the 15 and 6 meter parts to the antenna. Use the following diagram to assist in identifying the parts and their proper locations: 31. Position wire clamp 0.875" 15M with insulator (K) around tube (F) and use a # 8 x 1" screw, lock washer and hex nut.
  • Page 16 Downloaded from www.g7syw.com 36. Insert the un-slotted end of tube (H) into the slotted end of tube (G) and secure with a # 8 x 1" screw, lock washer and hex nut. 37. Position wire clamp 0.625" 6M with wire (T) around tube (H) so the top edge is 33-1/4” from the upper end of the tube.
  • Page 17 Downloaded from www.g7syw.com 42. Locate the 15M wire clamp 0.625" with insulator (M) and position it around tube (H). Final tightening and positioning will be done in a later step. 43. Insert the un-slotted end of tube (I) into the slotted end of tube (H) and secure with a # 8 x 1" screw, lock washer and hex nut.
  • Page 18 Downloaded from www.g7syw.com 48. Line up wire clamp 0.875" 15M with insulator (K), wire clamp 0.750" 15M with insulator (N) and wire clamp 0.625" 15M with insulator (M) with wire clamp 0.500" 15M with wire (L) and tighten all clamps making sure the wire is moderately taut but not enough to cause the upper tubing section to bow.
  • Page 19 Downloaded from www.g7syw.com 54. Place # 8 washers over each screw and install coil (Q) base matching. Secure with washers, lock washers and hex nuts. NOTE: Attach radials and ground to tube with insulator (A) using the remaining # 8 hardware on the ground side (lower side) of the coaxial cable connection.
  • Page 20 Downloaded from www.g7syw.com Checkout and Adjustment Adjustments will have to be made before trying to transmit with this antenna system. Installations vary considerably and there are no ‘set’ measurements that will work for all the variables in the installation. The dimensions and coil settings that were used during assembly are somewhat close and may produce reasonably low VSWR readings over the entire 10, 15, 20 and 30 meter bands and at least 250 kHz of the 40 meter band.
  • Page 21 Downloaded from www.g7syw.com 0.500" 15M with wire (L) and wire clamp 0.875" 15M with insulator (K). A change of 2 inches will shift the VSWR curve approximately 300 kHz. Check VSWR on 6 meters. To raise the frequency of the lowest VSWR, shorten the length of the wire and to lower frequency increase the wire length.
  • Page 22 Downloaded from www.g7syw.com 6. Check VSWR on 20 meters. Tuning is quite broad on this band because the antenna is physically much taller than a 1/4-wavelength. To raise the frequency of the lowest VSWR, reposition the 30 meter assembly so that the coil support tube 30 meter L bracket (O1) can be replaced on the next lower turn of the 40 meter coil.
  • Page 23 Downloaded from www.g7syw.com minimal ground system (or a system of resonant radials in the case of above-ground installations) has been installed. If those fairly basic conditions have not been met it is likely that resonance and low VSWR will be impossible on some or even all bands.
  • Page 24 The 12-radial system of Figure 2 is a very good one, but it requires at least 12 tie-off points. ® Butternut has developed a multiband radial made of 300 ohm twinlead that resonates simultaneously on 40, 20, 15 and 10 meters. Four such radials offer essentially the same ground plane performance as the system of Figure 2 but require only 4 supports.
  • Page 25 Downloaded from www.g7syw.com the ground connection. Alternatively, a 1/4-wave vertical may be window mounted if a short ground lead to a cold water pipe or radiator can be used. If a long lead must be used, tuned radials may be required for resonance on one or more bands.

  • Page 26: Lightning Protection

    Steel TV mast sections are readily available in lengths of ten feet and the ® mounting posts of Butternut HF verticals will slide into those which have an outside diameter of 1-1/4 inches and a wall thickness of .058 inches.
  • Page 27 Downloaded from www.g7syw.com Symptom: SWR on 15 meters seems to vary during a windy day. Look for: This is normal since the 15 meter wire is side mounted and when the antenna sways, the distance between the 15 meter wire and main antenna will vary. Symptom: SWR on 17 meters seems to be high compared to the other bands.
  • Page 28 Adjust coils carefully! Remember, tuning, is sharp on these bands, so it is easy to pass the resonant point, then assume erroneously that the antenna isn't tuning. BEFORE you call Butternut for help, please double check your installation, including all connections and dimensions. Tune carefully and systematically. Have SWR curves available.
  • Page 29 Downloaded from www.g7syw.com Guying the HF9V Antenna The HF9V is designed to survive winds of up to 80 mph without guying in the absence of ice loading or heavy precipitation, but over a period of time it is to be expected that frequent or even constant flexing or vibration will reduce the chances for survival in winds that would not damage a newly installed antenna.
  • Page 30 Downloaded from www.g7syw.com ® Butternut HF9V Parts List Part Part Description Description Number Number 00278SZV Tube A with Insulator, 1-1/8” dia x 24” long 00331RZV Wire Clamp, 5/8” with Wire - 6M 00115AV Tube B element, 1-1/8” dia x 48” long 00332RZV Wire Clamp, 3/4”...
  • Page 31 Downloaded from www.g7syw.com HF9V Assembly with Enlarged Details [Dimension in inches. Drawings not to scale.] - 30 - - 30 - www.g7syw.com...

  • Page 32: Technical Support

    All products manufactured by Butternut are warranted to be free from defects in material and workmanship for a period of one (1) year from date of shipment. Butternut’s sole obligation under these warranties shall be to issue credit, repair or replace any item or part thereof which is proved to be other than as warranted; no allowance shall be made for any labor charges of Buyer for replacement of parts, adjustment or repairs, or any other work, unless such charges are authorized in advance by Butternut.

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