11/28/2018 0 Comments Diamond X300 Antenna ManualThe most important part of my home amateur radio station is finally in place! Here is my Diamond X300 antenna, installed about 5 feet above the roof, top of the antenna at 56 ft above sea level. 2m/70cm Dual Band High Performance Gain Base Station Antenna DIAMOND ANTENNA Products are distributed by RF PARTS COMPANY 435 S. Pacific Street • San Marcos. Back to Antenna index Next antenna Last modified 2010-07-10 Diamond X-300. Type: Amateur VHF/UHF vertical base antenna: Band(s): 2 m - 2*5/8-wave 70 cm - 5*5/8-wave. Click thumbnail to view full size image My Antenna Setup: • dual-band 2M/70cm base antenna (from ) • Times LMR-400 coax, 50 ft. (eBay), 2x PL-259 connectors (also eBay) • (parts box) • (eBay) • 20 ft (2x10ft) 16 ga. Purchased $10 ea. From Radio Shack • Two steel wall brackets (parts box) • Bottom of mast is sitting in a concrete-filled hole Diamond X300A Assembly Notes The antenna is fairly easy to assemble using a few basic tools. Be sure to carefully read the at least once. I applied dielectric silicon grease to the weather gasket to ensure reliability and also to the internal element joint bracket to prevent possible oxidation in the joint. I then attached the upper element to the lower element very securely with a #2 Philips screwdriver, assembled the upper and lower shell pieces tightly, wrapped the entire joint with silicon self-fusing tape, then finished with a final wrap of good 3M electrical tape. While wrapping with silicon tape may not be necessary, I wanted to ensure a long-life, weatherproof joint. Finally I applied dielectric silicon grease on the radial element joints to prevent corrosion, then tightened well. Coax Preparation and Antenna Installation It’s been close to 10 years since I installed PL-259 connectors but the technique came back quickly. LMR-400 coax is tough stuff; peeling and scraping the aluminum outer shielding, bonded (glued?) to the inner conductor insulator, was a pain in the ass. My trusty razor knife came through. Twist the PL-259 down on the coax with a pair of pliers, nip the tip off the center conductor, solder that sucka good. Finally slid a piece of super mega duty, dual-wall heat shrink over the back of the connector and heat it up/shrink it down for a permanent seal and coax strain relief. I filled and weatherproofed the connector with “Stuf” dielectric compound. Connected the coax securely to the antenna. The coax slips inside the so space was tight, so I wrapped the connector with Vipar X-Treme self-fusing silicon rubber tape (instead of the more bulky Coax-Seal), then a quick wrap of good 3M electrical tape to make sure the silicon tape can’t unravel. These little details should hopefully keep the weather out and ensure reliability for years to come. Finally, finish bolting everything together and test the antenna. VHF SWR is 1:1 to 1.2:1 across the 2 meter ham band. I was unable to test UHF due to a faulty meter; however, actual on-air performance is excellent. I do intend to test and monitor SWR when I get a new meter. Diamond X300A Antenna Performance @ 50 Watts Under normal conditions I can reach repeaters up to 45 miles away, albeit with noisy signal. I can talk comfortably on 2 meter up to 35 miles and 70cm up to 37 miles. I receive less static noise on 70cm; unfortunately there is not much local activity on the 440 band. My home is located “down in the hole” at 27 ft above sea level (). There are hills to my north and east rising to around 120 ft. Within a mile of my home, which makes distance contacts in those directions more difficult. That being said, I can reliably talk on a repeater 31 miles to my north at 1,000 ft. Locations south and west, especially across the Chesapeake Bay and down into Baltimore and Annapolis are no problem. Nokia morse code. I am very pleased with the Diamond X300 and I highly recommend it! Base Station / Yagi Beams A144S5 & A144S10 163kb A430S10 & A430S15 530kb A502HB & A504HB 245kb Base Station / Repeater Antennas BC103 2 mb BC920 2.5 mb CP22E 1005kb CP5H 822kb CP62 470kb CP610 582kb D130 Series 179kb D3000N 731kb F22A 392kb F23A 1260kb F23H 1.8 mb F718A 511kb F1230A 1005kb G200 360kb V2000A 53kb X50A 1mb X200 A 1.1mb X300 A & X300NA 1.1mb X510HDM & X500HDN 1.7mb X500HA & X500HNA 783kb X700HA & X700HNA 1648kb X6000A 36kb W735 & W8010 36kb Cable Assemblies C211 52kb C101 pdf Coming Soon! C101NMO pdf Coming Soon! C213 pdf Coming Soon! Diamond X300 Antenna ReviewsC213NMO pdf Coming Soon! Mobile Antennas D220 542kb CR320A CR320NMO 542kb CR8900A 756kb HF6FX 65kb HF50CX 69kb HV7A 159kb MG200 36kb MR77 94kb MV3A 36kb M285S M285SNMO 104kb M685S M685SNMO 121kb NR22L 60kb NR7900A 61kb SG7500 36kb SG7900 36kb SD330 1587kb HF6CL 985kb HF10CL 985kb HF15CL 973kb HF17CL 952kb HF20CL 953kb HF30CL 985kb HF40CL 945kb HF80CL 952kb Mobile Antenna Mounts CRM Coming soon! Assembling Diamond X300 AntennaHRKS 761kb K400 127kb K400-3/8C 56kb K400C 29kb K400CNMO 29kb K400N 53kb K400S 52kb K400SNMO 52kb K412C 52kb K412CNMO 52kb K412S 52kb K412SNMO 52kb K515S 124kb K515SNMO 124kb K540KM 44kb K550KM 60kb K600 94kb K9000 132kb Multi-Band HF Antenna BB7V 398kb CP6AR 1.197kb W8010 & W735 789kb CP5H 639kb CP8040 258kb Power / SWR Meters SX-20C 36kb SX-40C 40kb SX-100 1693kb SX-200 / SX-400 3192kb SX-600 1570kb SX-1000 187kb SX240C 187kb Diamond® Antennas are sold through authorized dealers. Contact one of your local for current price & availability. Xtree gold 3.0 dos download.
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