Page 41 of AES Ham Radio Catalog by AES Amateur Electronic Supply

LOW-PASS HIGH-PASS FILTERS For suppressing Television interference (TVI) from near by HF transmitters Low-pass filters install in the transmission line between the transmitter and antenna or tuner. They are designed to allow signals below the cutoff frequency to pass through and attenuate signals above the cutoff frequency. High-pass filters install at the TV set antenna terminals and allow signals above the cut-off frequency to pass through and attenuate signals below the cutoff frequency. FILTERS/INTERERENCE 65 1-800-321-3594 OH 1-800-327-1917 FL 1-800-634-6227 NV Email Your Questions to info@aesham.com AES BANDPASS FILTERS Install in transmission line between a 2 meter, 220 or 440 MHz rig and antenna to reduce strength of out-of-band interfering signals while allowing wanted signals to pass through at full strength. Eliminate squeals, squawks, beeps and strange voices from a UHF or VHF radio caused by intermodulation from strong, nearby pagers, police radio, etc. Effectively reduces spurious emissions on transmit. Hear desired signals even in crowded, urban centers. 2M/220 MHz uses four helical resonators, 440 MHz uses four 1/4-wave linear resonators, both with aperture coupling. VSWR 1.5:1; 200W power rating; Made of extruded aluminum, copper and brass. Dim: 12w"x 3"h x 5"d; 2 lb, 11oz. 146-4H 144-148 MHz. Loss 1 dB; Selectivity: -57dB 136 MHz and -43dB 156 MHz. SO-239 silver-teflon connectors............................ $119.99 145-2H Same, but 144-146 MHz ....... $119.99 146/444DB 144-148 438-450 MHz. Selectivity: -50dB 136 MHz, -40dB 156 MHz, -30dB 425 MHz, -25dB 465 MHz. SO-239 silver-teflon connectors ............................... $189.99 223.5-3H 222-225 MHz. Loss 1 dB; Selectivity: -33dB 213 MHz and -28dB 233 MHz. SO-239 silver-teflon connectors............................ $119.99 445-10C 440-450 MHz. Typical selectivity: -47dB 425 MHz, -50dB 456 MHz; Loss 1dB. Type-N silver-teflon-gold connectors....... $139.99 435-10C Same, but 430-440 MHz ..... $139.99 Upgrade to type-N connectors on 2m and 220 MHz models add $10 to price. Special Order Cure telephone RF interference in the most irritating cases even when dealing with transmitters with full legal power output. Use any number of filters with no adverse effect on telephone performance. RF-1 For single line equipment including wired or cordless phones, answering/fax machines, modems, etc. Uses standard modular connectors ...... $16.99 RF-1/2-LINE For 2-line or multi-line, multi-station electronic key phone systems.............. $22.99 RF-1/COILED For use when RFI enters thru coiled telephone cord between base and handset .. $22.99 RF-2 Hard-wired, provides a wide range of installations optional to add RFI rejection at a variety of physical/electrical locations in the system; inside jacks, behind wall mounts, etc ................... $10.99 RF-1 single line RF-2 hard-wired RF-1 coiled HP-300T 300 ohm High-Pass Filter Sharp cutoff at 52 MHz with 70dB attenuation below 50 MHz. For use with TV twinlead ............. $14.99 HP-75T 75 ohm High-Pass Filter For use with 75 ohm TV coaxial cable ........................ $14.99 DCI DIGITAL COMMUNICATIONS LP-30 Low 52 Ohm Low-Pass Filter Covers 1.8-30 MHz, handles 1.5 KW. Up to -70dB harmonic attenuation.................................. $69.99 LP-2500 Same, but 2.5KW rating... $129.99 HPF-1 300 ohm High-Pass Filter High harmonic attenuation in the 52-550 MHz TV passband. 75 ohm balun and F connector .... $24.99 VECTRONICS 704 52 Ohm Low-Pass Filter Covers 1.8-30 MHz, handles legal limit. Insertion Loss: 0.5 dB; Dim: 2.9" h x 2.9"w x 7.8"d ................... $49.99 YA-1 52 Ohm Low-Pass Filter Covers 1.8-29.7 MHz, handles 1.5KW continuous (5KW Peak. Ultimate attenuation: 80dB 54 MHz. Loss: 0.2dB. Dim: 9.2"w x 2.5"h x 2.5"d...... $85.99 701 RFI Free Choke Kit Eliminate RFI problems by winding offending cables around an RFI suppressing toroid. Effective from 0.5-200 MHz. Separates into halves for easy winding of all types of cable computer ribbon, coax, power cord, telephone, audio-video. Halves mount in snap-together plastic frame. Multiples can be stacked for more effect........ (Pack of 4) $14.99 RFI-4 RF Interference Kit A selection of ferrite toroids and beads to eliminate RFI from 1-1000 MHz. Contains: 12 beads with 0.2" holes for small wires and cables, 4 toroid (donut shaped) cores with 1/2" holes, 4 with 3/4" holes and 4 split beads (toroids cut in half so you can put them over cables without disconnecting). Two fit over RG-58 (1/4" hole) and two fit over RG-8 (1/2" hole). Includes a RFI tip sheet explaining the use of ferrites and how to use them to keep RF out of computers, stereos, VCRs, alarm systems, and telephones ............................. $25.99 TELEPHONE RF INTERFERENCE FILTERS HPF-1 LP-30 LF-30A 52 Ohm Low-Pass Filter Covers 1.8- 30 MHz, handles 1 KW. Ultimate attenuation: 90dB above 90 MHz. Loss: 0.5dB 30 MHz Dim: 9.6"w x 2"h x 1.5"d ....................... $64.99 HP-300T HP-75T FERRITE RFI KITS The ARRL RFI Book Loads of information for practical interference cures: Power line, Automotive, Television, Computers, Lamps, VCRs, Stereos, Intermod, Telephones. Latest regulations, suppliers, more. 235 pages. ARR 6834 $24.95 Ferromagnetic-Core Design Application Handbook The legendary textbook from the late Doug DeMaw, W1FB emphasizes the practical aspect of ferromagnetic core material. 256 pages .................................... MFJ 3506 $19.95 Ladder Crystal Filters A handy reference guide for the development and construction of Ladder Crystal Filters by John Pivnichny, N2DCH. 134 pages .............. MFJ 3509 $19.95 AC Power Interference Handbook 2nd edition, revised, by Marv Loftness, KB7KK. New insights into the causes, effects, locating and correction of power-line and electrical interference. 18 chapters ... ARR 9055 $29.95 Interference and Filter Publications

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