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- From the files of the ARRL Automated Mail Server, (info@arrl.org):
-
- Prepared as a membership service by the American Radio Relay
- League, Inc., Technical Information Service, 225 Main St.,
- Newington, CT 06111 (203) 666-1541.
- Email: tis@arrl.org (Internet).
-
- file: \public\info\tis\rfisource.txt updated: 06-07-93
-
- Thank you for requesting the following information from the ARRL
- Technical Information Service or the ARRL Automated Mail Server
- (info@arrl.org). ARRL HQ is glad to provide this information free
- of charge as a service to League members and affiliated clubs.
-
- For your convenience, you may reproduce this information,
- electronically or on paper, and distribute it to anyone who needs
- it, provided that you reproduce it in its entirety and do so free
- of charge.
-
- If you have any questions concerning the reproduction or
- distribution of this material, please contact Michael Tracy,
- American Radio Relay League, 225 Main St., Newington, CT 06111
- (email: mtracy@arrl.org).
-
- Subject: SOURCES OF EMI PRODUCTS
-
- EMC BOOKS AND PUBLICATIONS
-
- Radio Frequency Interference: How To Find It and Fix It, American
- Radio Relay League, 225 Main St., Newington CT 061111,
- (203) 666-1541, order #3754, $15.00 plus $3.00 shipping and handling.
-
- The Interference Handbook, Radio Publications, Inc., available from
- American Radio Relay League, order # 6015, $12.00 plus $3.00 shipping
- and handling.
-
- The Radio Amateur's Guide to EMC, Radio Society of Great Britain,
- Cranborn Road, Potters Bar, Herts EN6 3JE, Great Britain
-
- The ARRL Technical Information Service (TIS) has prepared a series
- of free EMI information packages. The "EMI/.RFI Package" and
- "EMI/RFI - Telephone" are the most comprehensive. Contact the
- ARRL Technical Department Secretary for a list of available
- TIS packages. Contact the ARRL "RFI Desk" for additional information
- and help with interference problems involving Amateur Radio stations.
- For interference involving other radio services contact your nearest
- FCC Field Office.
-
- An extensive list of free pamphlets about electromagnetic
- interfererence and lightning protection is available from
- Industrial Communications Engineers, POB 18495, Indianapolis
- IN 46218-0495, (317) 545-5412.
- Request their free publications list.
-
- A several page free pamphlet about telephone interference is available
- from K-Com, POB 83, Randolph OH 44265, (216) 325-2110. Request their
- free telephone RFI handout.
-
- LOW-PASS FILTERS, BANDPASS TRANSMIT FILTERS
-
- Barker and Williamson (B&W), 10 Canal St, Bristol PA 19007,
- 215-788-5581, Model FL10/100, Model FL10/1500
-
- Bencher, 333 W Lake St, Chicago IL 60606, 312-263-1808, Model YA-1
-
- Bird , 30303 Aurora Rd, Solon OH 44139-2794, 216-248-1200,
- Model 5040 series
-
- Industrial Communications Eng , POB 18495, Indianapolis IN 46218-0495,
- 317-545-5412, Model 400 series band-pass, Model 420 series low-pass
-
- Kilo-Tec, POB 10, Oak View CA 93022, 805-646-9645, Model KT-LPF2
-
- MFJ, POB 494, Mississippi State MS 39762, 601-323-5869, Model MFJ-704
-
- Radioware,POB 1478, Westford MA 01886, 800-950-WARE
-
- Ten Tec, 1185 Dolly Parton Parkway, Sevierville TN 37862,
- 615-453-7172, Model 5061
-
- Unadilla, POB 4215 BV, Andover MA 01810, 508-975-2711, Model WA2ZOT,
- WA2ZOT-6Meter
-
- HIGH-PASS FILTERS
-
- The high-pass filter is the first line of defense against TVI to
- antenna-connected televisions that is caused by HF radio
- transmitters! A high- pass filter is not usually needed or
- effective with interference problems to CATV-connected TVs. For
- cable interference problems, use a common-mode choke.
-
- Note: High-pass filters are usually available from the local
- electronics distributor that sells parts to your local electronics
- service businesses. Consult the Yellow Pages under "Electronic
- components - wholesale and manufacturer."
-
- Channel Master, Industrial Park Dr., Smithfield NC 27577,
- 919-934-9711, several models
-
- Cornell Dublier Electronics, 1605 E Rodney French Blvd, New Bedford,
- MA 02741, 617-996-8561
-
- Industrial Communications Engineers, POB 18495, Indianapolis IN,
- 46218-0495, 317-545-5412, Model 430 series high-pass
-
- N6YHY TVI Filters , 928 Yellow Brick Rd, Modesto CA 95351,
- 209-531-1236, Model YAK-plus TVI filter
-
- Radio Shack, Catalog: 15-579 75-ohm, 15-582 or 15-581 300-ohm
-
- Ten Tec, 1185 Dolly Parton Parkway, Sevierville TN 37862,
- 615-453-7172, Model 5060
-
- Winegard , 3000 Kirkwood St, Burlington IA 52601-1007, Model HP-2700
-
- COMMON-MODE CHOKES
-
- Industrial Communications Engineers, POB 18495, Indianapolis IN,
- 46218-0495, 317-545-5412
-
- N6YHY TVI Filters, 928 Yellow Brick Rd, Modesto CA 95351,
- 209-531-1236, Model Gorilla TVI choke
-
- Starplex, Inc., 1912 Falcon, Hanley Hills, MO 63133, 314-423-5756,
- Model Ghost Buster dual-ferrite choke
-
- TCE Labs , 5818 Sun Ridge, San Antonio TX 78247, Model # BX#2S
-
- CABLE-TV SET-TOP CONVERTERS
-
- The following set-top converters have been reported as being
- relatively immune to cable-TV interference: (Additional reports
- are sought.)
-
- General Instruments/Jerrold: Bar code - TOA1104176B5
-
- VHF-NOTCH FILTERS
-
- Amateur VHF stations can interfere with antenna-connected
- televisions. Television tuners do not often have much
- adjacent-channel rejection, resulting in severe fundamental
- overload. These tunable notch filters will reject the strong
- amateur signal, allowing the television to function normally.
-
- Note: these filters will not help when an amateur signal is
- interfering with cable channel 18 (channel E). In that case,
- the problem results because cable channel 18 and the Amateur
- 2-meter band occupy the same frequencies. Some of these filters
- are expensive. Contact the vendor before ordering.
-
- Microwave Filter Company 6743 Kinne St E Syracuse NY 13057
- (315) 437-3953, Filter: 5KMT-A-I (reject 108-170 MHz)
- Filter: 5KV-E (Channel E (146.25 MHz) (Cable ch 18) trap)
- Filter: 5KV-K (Channel K (223.25 MHz) (Cable ch 24) trap)
- Filter: F6367-2 (Notch filter 50-108 MHz, 75-ohm)
- Filter: F6367-3 (Notch filter 108-216 MHz, 75-ohm)
- Filter: F6367-4 (Notch filter 216-450 MHz, 75-ohm)
- Filter: F6367-5 (Notch filter 450-900 MHz, 75-ohm)
- Note: They will sell single units. Prices do not include
- shipping.
-
- RMS Electronics 621 Route 46 Hasbrouck Heights NJ 07064
- (201) 288-8833, Filter: MBR-A-2-I (reject 88-170 MHz)
- Filter: MBR-A-I (reject 108-170 MHz) Filter: LLMBRLPF
- (pass ONLY VHF ch2-6 and 7-13) Filter: PT-EN 20321
- (Channel E (146.25 MHz) (Cable ch 18) trap) Filter: PT-KN
- 20327 (Channel K (223.25 MHz) (Cable ch 24) trap)
- Note: Call to find nearest distributor
-
- US Electronics 600-D No Bicycle Path Port Jefferson NY 11776
- (516) 331-2552, Filter: LLMBRLPF (pass ONLY VHF ch2-6 and 7-13)
- Filter: MBR-A-2-I (reject 88-170 MHz) Filter: MBR-A-I
- (reject 108-170 MHz) Filter: MWT-4 (pass 54-300 MHz, reject
- tunable notch) Note: Will sell single units.
- Call for nearest distributor.
-
- Star Circuits POB 94917 Las Vegas NV 89193 800-433-6319
- Note: Tunable notch, Model: 23H tunes 6 M Model: 1822 tunes 2M
- Model: 46FM tunes FM BCB
-
- Winegard 3000 Kirkwood St Burlington IA 52601-1007,
- Model: UT-2700 notched 470 to 800 MHz Model: BF-1700
- attenuates 110-170 MHz (eliminates 2M signal)
-
- TELEPHONE EMI FILTERS
-
- AT&T , Model: Z100B1, SKU # 09205, Call 800-222-3111 for the
- location of nearest AT&T Phone Store., Note: The Z100 and Z101A
- are now obsolete. They are not effective at the upper HF band
- (>10 MHz). The new AT&T telephone EMI/RFI filter is the Z100B1.
- Reports about it are mixed, but it is readily available.
-
- Coilcraft, 1102 Silver Lake Rd, Cary IL 60013, 800-322-2645
-
- Engineering Consulting, 583 Candlewood St, Brea CA 92621,
- 714-671-2009, Model TRIF
-
- Industrial Communications Engineers, POB 18495, Indianapolis
- IN, 46218-0495, 317-545-5412, Model 460 series telephone/audio
- filters
-
- K-Com, POB 83, Randolph OH 44265, 216-325-2110, Model RF-1
- (modular), Model RF-2 (wired)
-
- Kilo-Tec, POB 10, Oak View CA 93022, 805-646-9645, Model KT-RTK
- telephone filter kit
-
- Measures, Richard, 6455 LaCumbre Rd, Somis CA 93066, 805-482-3034
-
- N6YHY TVI Filters, 928 Yellow Brick Rd, Modesto CA 95351,
- 209-531-1326, Model Zebra telephone filter
-
- Southwestern Bell, Freedom Phone Accessories, 7486 Shadeland
- Station Way, Indianapolis, IN 46256, 317-576-6847,
- Model ZM04223
-
- Sparrevohn Engineering, 143 Nieto Ave SW #1, Long Beach CA 90803,
- 714-642-7323, 310-433-7240, Model F-1 (single-line), Model F-2
- (two- line)
-
- TCE Labs, 5818 Sun Ridge, San Antonio TX 78247, Model TP-5301
- (one-line, modular), Model TP-5302 (two-line, modular)
-
- Telecom Industries, 1385 Akron St, Copiage NY 11726, 516-789-5020,
- Model 831-W1
-
- EMI-RESISTANT TELEPHONES
-
- PRO Distributors, 2811-B 74th St, Lubbock TX 79423,
- 800-658-2027, PRO Distributors telephones are guaranteed to
- eliminate RFI or your money back.
-
- Radio Shack, Model: ET-171 Catalog: 43-374A, Model: ET-141
- Catalog: 43-595, Reports from ARRL Technical Coordinators
- indicate that these telephones have a high degree of built-in
- immunity. This is not necessarily guaranteed by Radio Shack.
- Other Radio Shack telephones have not been tested.
-
- TCE Labs, 5818 Sun Ridge, San Antonio TX 78247, Model TPXL
- (one-line wall or desk), Model TPXL-2D (two-line, desk), TCE Labs
- telephones are guaranteed to eliminate RFI or your money back.
-
- OLD AT&T telephones, made by several different companies, notably
- models 300, 500 (rotary), 2500 (DTMF), 2554 (DTMF wall phone,).
- These phones are made by AT&T (Western Electric), Comdial
- (Stromberg Carlson), Northern Telecom, and ITT. These phones
- have no semiconductors in them and have a carbon microphone, hence
- the RF immunity. The only devices that can produce problems are
- the silicon carbide varistors. Most of these phones are no longer
- being manufactured but are sometimes found used at garage sales or
- flea markets.
-
- The ARRL Technical Department has received one report (each) that
- the following telephones are immune to EMI. Additional reports
- about these telephones are sought. (Note - just because one phone
- by a particular manufacturer is immune does not indicate that ALL
- phones by that manufacturer are immune! Several of these
- manufacturers have phones for which we have received
- inteference reports.)
-
- Phonemate 8250
- AT&T 5300 and 5400 (cordless telephones.)
- Conairephone PR1001
- NT Meridian Centrex telephone sets
-
- TELEPHONE COMPANY CONTACTS
-
- AT&T National Sales and Service Center, 800-222-3111
- Cobra Comm, 800- 262-7222
- Code-A-Phone, 503-655-8940
- Fun Products, 415-540-0334
- General Electric, 800-447-1700
- ITT - Technical Assistance, 601-287-5281
- Lonestar, 516-939-6116
- Northern Telecom, 919-992-5743
- PacTel, 800-426-2372
- Panasonic Consumer Electronics, 800- 221-3438 ext 6881
- Phonemate, 800-247-7889, 213-320-9810
- Plantronics, 800-538-0748, 800-662-3902 CA
- Sanyo, 800-524-0047 ext. 502 or 520
- Soundesign Corporation, 201-434-1050
- Swisstel, 201-470-5706
- Toshiba, 714-583-3700
- TT System, 914-968-2100
- Uniden Corp., 317-842-2483
-
- FERRITE MATERIALS (use to make common-mode chokes)
-
- Amidon, 2216 E Gladywick St, Domininguez Hills CA 90220,
- 310-763-5770
-
- Fair-Rite Products Corp, div of Dexter Magnetic Materials,
- 10 Fortune Drive, Billerica MA 01865, 800-345-4082, Note:
- Call to locate nearest distributor
-
- Kilo-Tec, POB 10, Oak View CA 93022, 805-646-9645
-
- MFJ, POB 494, Mississippi State MS 39762, 601-323-5869
-
- N6YHY TVI Filters, 928 Yellow Brick Rd, Modesto CA 95351,
- 209-531-1236
-
- Ocean State Electronics, POB 1458, Westerly RI 02991,
- 800-523-0667
-
- Palomar, POB 462222, Excondido CA 92046, 619-747-3343
-
- Radio Shack catalog #s 273-105 and 273-104
-
- AC-LINE FILTERS
-
- Industrial Communications Engineers , POB 18495, Indianapolis IN
- 46218-0495, 317-545-5412, Model 472 isolator, Model 400 series
-
- Radio Shack, Catalog: 15-1111 brute-force AC-line filter, 26-1395
- surge- protection filter (it contains common-mode and differential
- mode AC-line filtering.)
-
- TCE Labs, 5818 Sun Ridge, San Antonio TX 78247, Model KW-1
-
- DIRECTION FINDING PRODUCTS
-
- Douglas RF Devices, POB 246925, Sacramento CA 95824, no telephone
- Doppler DF kits
-
- MISCELLANEOUS
-
- Industrial Communications Eng, POB 18495, Indianapolis IN,
- 46218-0495, 317-545-5412, Model 461 stereo , Model 440 mobile,
- Model 488 video
-
- Radio Shack (mobile) 270-051, 270-055, 270-054, 270-012, 272-1085,
- 270-030
-
- TCE Labs, 5818 Sun Ridge, San Antonio TX 78247, Model SP-1 speaker leads
-
- Wacom Products, Cavities and duplexers, POB 21145, Waco TX 76702,
- 817-848-4435
-
- Winegard, 3000 Kirkwood St, Burlington IA 52601-1007, Model FT-7600
- variable FM trap, Model VF-3000 VCR, Model VF-4000 VCR
-