Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Related Manuals for Comtek COM-40VA
Summary of Contents for Comtek COM-40VA
- Page 1 40 Meter Vertical Antenna COM-40VA COM-40VA-INS-Revision 0a © COMTEK SYSTEMS 2010 P.O. Box 1491 - Akron, OH 44309-1491 USA Phone: (800) 777-0703 Technical Support and International: (330) 572-3200 Fax: (330) 572-3279 E-mail: Info@comteksystems.com - 1 -...
- Page 2 Congratulations! You are now the proud owner of a Comtek 40 Meter Vertical Antenna. Specifications: • Full band coverage on 40 meters with SWR under 1.5:1 No Tuner needed • Bandwidth greater than 750 kHz with SWR under 2:1 • Power Handling up to 5 kW •...
- Page 3 Overhead Power Line Safety Before you begin working, check carefully for overhead power lines in the area you will be working. Don't assume that wires are telephone or cable lines: check with your electric utility for advice. Although overhead power lines may appear to be insulated, often these coverings are intended only to protect metal wires from weather conditions and may not protect you from electric shock Keep your distance! Remember the 10-foot rule: When carrying and using ladders and other long...
- Page 4 The wire radials should placed as symmetrically as possible around the vertical antenna and spaced evenly, regardless of how many radials are used. Do not cross or bunch any radial wires as this nullifies their effectiveness. If you have limited space, put in as many straight radials as you can. The radial wires can be attached to the vertical using the lower left V-Bolt Saddle nut.
- Page 5 ® 3. Slide the 2" OD element that has the EXTREN insulators installed in the U-Bolts as shown ® below. Adjust the EXTREN insulators so they are centered on the U-Bolts. Tighten the U- Bolts evenly so the length of the exposed threads is approximately equal. Any U-Bolt should be tightened evenly from side-to-side with an equal amount of thread above each nut.
- Page 6 Frequency MHz Approximate Overall Length 7.000 34 Feet 5 inches 7.125 32 Feet 10 inches 7.175 32 Feet 7 inches 7.300 33 Feet 3 inches Figure 1 COMTEK 40 Meter Vertical Antenna Assembled Diagram - 6 -...
- Page 7 Tuning Tuning the COM-40VA 40 Meter Vertical Antenna is straightforward and intuitive. If you use an SWR meter or an analyzer at the base of the antenna you will get the most accurate readings in a timely fashion. Since the 2:1 SWR bandwidth of the antenna is wide the adjustment parameters are relatively broad and fine adjustment is not usually necessary.
- Page 8 All products manufactured by Comtek Systems are warranted to be free from defects in material and workmanship for a period of one (1) year from date of shipment. Comtek Systems’ 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 Comtek Systems.
Need help?
Do you have a question about the COM-40VA and is the answer not in the manual?
Questions and answers