ARRL EMI/RFI Products Resources

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: 01-27-95

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 
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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).


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, 2365 Waterfront Park Drive, Canyon Lake, TX  78133, (210) 899-4575, 
(800) KILL-TVI, 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, 2365 Waterfront Park Drive, Canyon Lake, TX 78133 (210) 899-4575, 
(800) KILL-TVI, 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, 2365 Waterfront Park Drive, Canyon Lake, TX  78133 (210) 899-4575, 
(800) KILL-TVI (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 , 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 

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, 401-596-3080

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. Note: This model has been discontinued.)

TCE Labs, 2365 Waterfront Park Drive, Canyon Lake, TX 78133 (210) 899-4575, 
(800) KILL-TVI, 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, 2365 Waterfront Park Drive, Canyon Lake, TX 78133 (210) 899-4575, 
(800) KILL-TVI, 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 

*eof

