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Amateur Radio - Ham Radio Magazine Searchable Index - List by Category

A Searchable Index of the old "Ham Radio" Magazine

"Ham Radio Magazine" was a periodical that ran for almost 22 years from 1968 to 1990. Use this indexed search to quickly find what you'd like to look at and then go purchase the scanned magazines (On CD, elsewhere, or occasionally from some generous download website) or look for the old paper magazine at used bookstores.

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Search

By Title Text By Author Callsign By Year Category

Results by Category: 9 — fm and repeaters

Article Author Page Issue
Amateur vhf fm operationW6AYZ36Jun 68
Audio-amplifier and squelch unitW6AJF36Aug 68
Narrow-band fm system. using ICs inW6AJF30Oct 68
Identifier, programmable repeaterW6AYZ18Apr 69
Repeater, receiving system degradationK5ZBA36May 69
Tone encoder and secondary frequency oscillator (HN)K8AUH66Jun 69
Receiver, modular fm communicationsK8AUH32Jun 69
Identifier, programmable repeaterShort circuit76Jul 69
Distortion in fm systemsW5JJ26Aug 69
Encoder, combined digital and burstK8AUH48Aug 69
Fm techniques and practices for vhf amateursW6SAI8Sep 69
Repeater transmitter, improvingW6GDO24Oct 69
Receiver, modular fm communicationsCorrection71Jan 70
Transmitter for two meters, phase-modulatedW6AJF18Feb 70
Modulation standards for vhf fmW6TEE16Jun 70
Fm techniques and practices for vhf amateursShort circuit79Jun 70
Receiver for two meter, fmW9SEK22Sep 70
Motorola voice commander, improvingW0DKU70Oct 70
Deviation meter (HN)VE7ABK58Dec 70
Receiver isolation, fm repeater (HN)W1DTY54Dec 70
Continuous tuning for fm converters (HN)W1DHZ54Dec 70
Frequency meter, two-meter fmW4JAZ40Jan 71
Motorola P-33 series, improving theWB2AEB34Feb 71
Repeater problemsVE7ABK38Mar 71
Receiver for two meter, fmShort circuit72Apr 71
Fm receiver frequency control (letter)W3AFN65Apr 71
Control head, customizingVE7ABK28Apr 71
Frequency meter, two-meter fmShort circuit72Apr 71
Deviation measurement (letter)K5ZBA68May 71
Collinear array for two meters, 4-elementW86KGF6May 71
Antenna, two-meter fm (HN)WB6KYE64May 71
Channels, three from two (HN)VE7ABK68Jun 71
Carrier-operated relay and call monitorVE4RE22Jun 71
Sequential switching for Touch-Tone repeater controlW8GRG22Jun 71
Fm transmitter, solid-state two-meterW6AJF14Jul 71
Motrac receivers (letter)K5ZBA69Jul 71
Channel scannerW2FPP29Aug 71
Motorola fm receiver mods (HN)VE4RE60Aug 71
Sequential encoder, mobile fmW3JJU34Sep 71
I-f system, multimodeWA2IKL39Sep 71
Fm transmitter, Sonobaby, 2 meterWA0UZO8Oct 71
Receiver, tunable vhf fmK8AUH34Nov 71
Push-to-talk for Styleline telephonesW1DRP18Dec 71
Fm transmitter, Sonobaby, 2 meterShort circuit96Dec 71
Tone-burst keyer for fm repeatersW8GRG36Jan 72
Receiver, modular, for two-meter fmWA2GBF42Feb 72
Deviation measurementsW3FQJ52Feb 72
Preamplifier, two meterWA2GCF25Mar 72
Filter, 455-kHz for fmWA0JYK22Mar 72
Transmitter, two-meter fmW9SEK6Apr 72
Collinear antenna for two meters, nine-elementW6RJO12May 72
Receiver, modular, for two-meter fmAdded notes73Jul 72
Receiver performance, comparison ofVE7ABK68Aug 72
Mobile operation with the Touch-Tone padW0LPQ58Aug 72
Interference, scanning receiver (HN)K2YAH70Sep 72
Repeater control with simple timersW2FPP46Sep 72
Fm transmitter, Sonobaby, 2 meterCrystal deck for Sonobaby26Oct 72
Receiver, vhf fmWA2GCF6Nov 72
Carrier-operated relayK0PHF, WA0UZO58Nov 72
Fm demodulator, TTLW3FQJ66Nov 72
Motorola channel elementsWB4NEX32Dec 72
Repeater control with simple timersCorrection91Dec 72
Mobile operation with the Touch-Tone padCorrection90Dec 72
Phase-locked loop, tunable, 28 and 50 MHzW1KNI40Jan 73
Repeater decoder, multi-functionWA6TBC24Jan 73
Scanner, vhf receiverK2LZG22Feb 73
Touch-tone circuit, mobileK7QWR50Mar 73
Tone-burst generator (HN)K4COF58Mar 73
Timer, simple (HN)W3CIX58Mar 73
Power amplifier, rf, 144-MHz fmW4CGC6Apr 73
Indicator, sensitive rfWB9DNI38Apr 73
Whip, 5/8-wave, 144 MHz (HN)VE3DDD70Apr 73
Mobile operation with the Touch-Tone padModification (letter)72Apr 73
Antennas, simple, for two-meter fmWA3NFW30May 73
Receiver, vhf fm (letter)K8IHO76May 73
Repeater installationW2FPP24Jun 73
Power supply, regulated ac for mobile fm equipmentWA8TMP28Jun 73
Logic oscillator for multi-channel crystal controlW1SNN46Jun 73
Frequency synthesizer, for two-meter fmWB4FPK34Jul 73
Relay, operational-amplifier, for Motorola receiversW6GDO16Jul 73
Frequency synthesizer, inexpensive all-channel, for two-meter fmW0OA50Aug 73
Base station, two-meter fmW9JTQ22Aug 73
Power amplifier, rf 220-MHz fmK7JUE6Sep 73
Frequency-synthesizer, one-crystal for two-meter fmW0MV30Sep 73
Touch-tone decoder, multi-functionK0PHF, WA0UZO14Oct 73
Antenna and control-link calculations for repeater licensingW7PUG58Nov 73
Test set for Motorola radiosK0BKD12Nov 73
Repeaters, single-frequency fmW2FPP40Nov 73
Test set for Motorola radiosShort circuit58Dec 73
Power amplifier, rf, 144 MHzHatchett6Dec 73
Cavity filter, 144-MHzW1SNN22Dec 73
Antenna and control-link calculations for repeater licensingShort circuit59Dec 73
Transceiver for two-meter fm, compactW6AOI36Jan 74
Power amplifier, two-meter fm, 10-wattW1DTY67Jan 74
Scanning receiver modifications, vhf fmWA5WOU60Feb 74
Receiver for six and two meters, multichannel fmW1SNN54Feb 74
Automatically controlled access to open repeatersW8GRG22Mar 74
Monitor receivers, two-meter fmWB5EMI34Apr 74
Vertical antennas, truth about 5/8-wavelengthK0DOK48May 74
Test set for Motorola radiosAdded note (letter)64Jun 74
Preamplifier, two meterW8BBB36Jun 74
Antenna, 5/8 wavelength two-meter, build from CB mobile whips (HN)WB4WSU67Jun 74
Frequency synthesizer, inexpensive all-channel, for two-meter fmCorrection (letter)65Jun 74
Private-line, adding to Heath HW-202WA8AWJ53Jun 74
Antenna, 5/8-wavelength, two-meterK6KLO40Jul 74
Autopatch system for vhf fm repeatersW8GRG32Jul 74
Scanning receivers for two-meter fmK4IPV28Aug 74
Squelch-audio amplifier for fm receiversWB4WSU68Sep 74
Tunable receiver modification for vhf fmWB6VKY40Oct 74
Reset timer, automaticW5ZHV54Oct 74
S-meter for Clegg 27B (HN)WA2YUD61Nov 74
Telephone controller, automatic for your repeaterK0PHF, WA0UZO44Nov 74
Scanning receiver, improved for vhf fmWA2GCF26Nov 74
220 MHz frequency synthesizerW6GXN8Dec 74
Touch-tone decoder, three-digitW6AYZ37Dec 74
Weather monitor receiver, retune to two-meter fm (HN)W3WTO56Jan 75
Vertical antennas, truth about 5/8-wavelengthAdded note (letter)54Jan 75
Single-frequency conversion, vhf/uhfW3FQJ62Apr 75
Digital touch-tone encoder for vhf fmW7FBB28Apr 75
Interface problems, fm equipment (HN)W9DPY58Jun 75
Touch-tone handset, converting slim-lineK2YAH23Jun 75
450-MHz preamplifier and converterWA2GCF40Jul 75
Tone encoder, universal for vhf fmW6FUB17Jul 75
Phase modulation principles and techniquesVE2BEN28Jul 75
Charger, fet-controlled for nicad batteriesWA0UYK46Aug 75
Receiver alignment techniques, vhf fmK4IPV14Aug 75
Mobile antenna, magnet-mountW1HCI54Sep 75
Touch-tone hand-heldK7YAM44Sep 75
Touch-tone decoder, three-digitCircuit board for62Sep 75
Satellite receivers for repeatersWA4YAK64Oct 75
Discriminator, quartz crystalWA0JYK67Oct 75
Receiver, vhf fmWA2GCF8Nov 75
Squelch circuits for transistor radiosWB4WSU36Dec 75
Phase modulation principles and techniquesCorrection59Dec 75
Tone encoder, universal for vhf fmCorrection58Dec 75
Telephone controller for remote repeater operationK0PHF, WA0UZO50Jan 76
Synthesized two-meter fm transceiverW1CMR, K1IJZ10Jan 76
144-MHz, 5/8-wavelength vertical antennaW1RHN50Mar 76
Mobile rig, protecting from theft (C&T)W1DTY42Apr 76
144-MHz vertical mobile antennas, 1/4 and 5/8 wavelength, test data onW2LTJ, W2CQH46May 76
144-MHz 5/8-wavelength, vertical antenna for mobileK4LPQ42May 76
Magnet mount antenna, portable (HN)WB2YYU67May 76
Time-out warning indicator for fm repeater usersK3NEZ62Jun 76
Detectors, fm, survey ofW6GXN22Jun 76
Repeater linking, carrier-operated relay forK0PHF57Jul 76
144-MHz digital synthesizers, readout displayWB4TZE47Jul 76
144-MHz fm exciter, high performanceWA2GCF10Aug 76
High performance vhf fm transmitterWA2GCF10Aug 76
European vhf-fm repeatersSM4GL80Sep 76
Synthesized two-meter fm transceiverLetter, W5GQV78Sep 76
Scanner, two-channel, for repeater monitoringW8GRG48Oct 76
Receiver performance of vacuum-tube vhf-fm equipment, how to improveW0GGV52Oct 76
Squelch circuit, another (HN)WB4WSU78Oct 76
Single-sideband fm, introduction toW3EJD10Jan 77
Up/down repeater-mode circuit for two-meter synthesizers, 600 kHzWB4PHO40Jan 77
Tone generator, ICAhrens70Feb 77
Synthesized channel scanningWA0UZO68Mar 77
Decoder, control functionWA9FTH66Mar 77
S-meter, audible, for repeatersZL2AMJ49Mar 77
144-MHz mobile antenna (HN)W2EUQ80Mar 77
IC-230 modification (HN)W8PEY80Mar 77
Telephone controller for remote repeater operationPrecautions (letter)79Apr 77
Remote base, an alternative to repeatersWA6LBV, WA6FVC32Apr 77
Converting low-band mobile antenna to 144 MHz (HN)K7ARR90May 77
Up/down repeater-mode circuit for two-meter synthesizers, 600 kHzShort circuit94May 77
Mobile antennas, vhf, comparison ofW4MNW52May 77
Frequency synthesizer sidebands, filter reduces (HN)K1PCT80Jun 77
Touch-tone encoderW3HB41Aug 77
144-MHz synthesizer, direct outputWB2CPA10Aug 77
Two-meter synthesizer, direct outputWB2CPA10Aug 77
Private call system for vhf fmWA6TTY62Sep 77
Repeater shack temperature, remote checkingZL2AMJ84Sep 77
Tone-burst generator for repeater accessingWA5KPG68Sep 77
Repeater kerchunk eliminatorWB6GTM70Oct 77
Multimode transceivers, fm-ing on uhf (HN)W6SAI98Nov 77
Two-meter synthesizer, direct outputShort circuit68Dec 77
144-MHz synthesizer, direct output (letter)WB6JPI90Jan 78
Repeater channel spacing (letter)WB6JPI90Jan 78
Private call system for vhf fm (HN)W9ZTK77Feb 78
Digital scanner for 2-meter synthesizersK4GOK56Feb 78
Repeater Interference: some corrective actionsW4MB54Apr 78
Command function debugging circuitWA7HFY84Jun 78
Frequency synthesizers, 600 kHz offset for (HN)K6KLO96Jul 78
Touch-tone decoder, ICW3OG26Jul 78
Subaudible tone encoders and decodersW8GRG26Jul 78
Simple scope monitor for vhf fmW1RHN66Aug 78
Single-tone decoderWA2UMY70Aug 78
Repeater jammers, tracking downW4MB56Sep 78
Fm demodulator using the phase-locked-loopKL7IPS74Sep 78
Preamplifier for handi-talkiesWB2IFV89Oct 78
Tone-alert decoderW8ZXH64Nov 78
Receivers, setup using hf harmonics (HN)K9MM89Nov 78
Solar powered repeater designWB5REA/WB5RSN28Dec 78
Synthesizer, 144 MHz, 800-channelK4VB, WA4GJT10Jan 79
Deviation, measuringN6UE20Jan 79
Tone-burst generator for repeater accessingShort circuit94Feb 79
Tone generator, IC (HN)W6IPB88Mar 79
External frequency programmer (HN)WB9VWM92Apr 79
Folded whip antenna for vhf mobile - WeekenderWB2IFV50Apr 79
Fm demodulator using the phase-locked-loopComments Anderson, Leonard H.6Apr 79
Amateur fm, close look atW2YE46Aug 79
Antenna design for omnidirectional repeater coverageN9SN20Sep 79
Synthesizer, 144-MHz CMOSK9LHA14Dec 79
Ni-cad charger, any-stateWA6TBC66Dec 79
Touch-tone decoder, third generationWA7DPX36Feb 80
Touch-tone decoder, third generationShort circuit67Sep 80
Add fm to your receiver (weekender)K3NXU74Mar 81
Speech processor for fm transmittersG4CLF, G3RZP76Mar 82
Autopatch, simplexWB6GTM42Jan 83
Forget memory (Ni-Cd discussion)K0OV62Jan 83
IC-255A switching circuit (HN)WB6IQV70Jan 83
Tone burst generator for European repeatersComments, K2MWU8Feb 83
Touch-tone decoderKC9C27Apr 83
Microprocessor repeater controllerKB5F56Apr 83
Repeater antenna beam tiltingK7NM29May 83
Squelch, smartW6NRW37Jun 83
IC-255A switching circuit (HN)Comments, WA4MZZ8Jun 83
Repeater antenna beam tiltingShort circuit80Jul 83
Linear translatorsWB6JNN14Sep 83
Repeater etiquette (letter)W1OLP8Oct 83
State-of-the-art auto dialerK2MWU21Dec 83
Repeaters, three circuits for (HN)N9EE91Jan 84
State-of-the-art auto dialerShort circuit10Feb 84
State-of-the-art auto dialerShort circuit10Mar 84
Repeaters, speech synthesis forN9EE79Mar 84
FM advantageWA9GDZ638Sep 84
Repeater, high-tech: designing and building an FM translatorWA6CAY82Feb 85
FM repeater separation : 20 kHz, Yes, 15 kHz, NoWD5IBS12Aug 85
DTMF controller for repeatersWB4FXD47Sep 85
Remote repeater programming using a computer and a telephoneKD9BC89Mar 86
Improved repeater/transmitter noise performance (HN)K1ZJH104Apr 86
Tone burst generator for European repeatersWA3EEC88Jul 86
ZIA connection: a multi-state 2-meter repeater linkK5XY30Oct 86
State-of-the-art auto dialerComments, WD9EIA8Feb 88