hr index - fm and repeaters

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144-MHz 5/8-wavelength, vertical antenna for mobile K4LPQ 42 May 76 +
144-MHz digital synthesizers, readout display WB4TZE 47 Jul 76 +
144-MHz fm exciter, high performance WA2GCF 10 Aug 76 +
144-MHz mobile antenna (HN) W2EUQ 80 Mar 77 +
144-MHz synthesizer, direct output WB2CPA 10 Aug 77 +
144-MHz synthesizer, direct output (letter) WB6JPI 90 Jan 78 +
144-MHz vertical mobile antennas, 1/4 and 5/8 wavelength, test data on W2LTJ, W2CQH 46 May 76 +
144-MHz, 5/8-wavelength vertical antenna W1RHN 50 Mar 76 +
220 MHz frequency synthesizer W6GXN 8 Dec 74 +
450-MHz preamplifier and converter WA2GCF 40 Jul 75 +
Add fm to your receiver (weekender) K3NXU 74 Mar 81 +
Amateur fm, close look at W2YE 46 Aug 79 +
Amateur vhf fm operation W6AYZ 36 Jun 68
Antenna and control-link calculations for repeater licensing W7PUG 58 Nov 73 +
Antenna and control-link calculations for repeater licensing Short circuit 59 Dec 73 +
Antenna design for omnidirectional repeater coverage N9SN 20 Sep 79 +
Antenna, 5/8 wavelength two-meter, build from CB mobile whips (HN) WB4WSU 67 Jun 74 +
Antenna, 5/8-wavelength, two-meter K6KLO 40 Jul 74 +
Antenna, two-meter fm (HN) WB6KYE 64 May 71 +
Antennas, simple, for two-meter fm WA3NFW 30 May 73 +
Audio-amplifier and squelch unit W6AJF 36 Aug 68
Automatically controlled access to open repeaters W8GRG 22 Mar 74 +
Autopatch system for vhf fm repeaters W8GRG 32 Jul 74 +
Autopatch, simplex WB6GTM 42 Jan 83 +
Base station, two-meter fm W9JTQ 22 Aug 73 +
Carrier-operated relay K0PHF, WA0UZO 58 Nov 72
Carrier-operated relay and call monitor VE4RE 22 Jun 71
Cavity filter, 144-MHz W1SNN 22 Dec 73 +
Channel scanner W2FPP 29 Aug 71 +
Channels, three from two (HN) VE7ABK 68 Jun 71
Charger, fet-controlled for nicad batteries WA0UYK 46 Aug 75 +
Collinear antenna for two meters, nine-element W6RJO 12 May 72 +
Collinear array for two meters, 4-element W86KGF 6 May 71 +
Command function debugging circuit WA7HFY 84 Jun 78 +
Continuous tuning for fm converters (HN) W1DHZ 54 Dec 70
Control head, customizing VE7ABK 28 Apr 71
Converting low-band mobile antenna to 144 MHz (HN) K7ARR 90 May 77 +
Decoder, control function WA9FTH 66 Mar 77 +
Detectors, fm, survey of W6GXN 22 Jun 76 +
Deviation measurement (letter) K5ZBA 68 May 71 +
Deviation measurements W3FQJ 52 Feb 72
Deviation meter (HN) VE7ABK 58 Dec 70
Deviation, measuring N6UE 20 Jan 79 +
Digital scanner for 2-meter synthesizers K4GOK 56 Feb 78 +
Digital touch-tone encoder for vhf fm W7FBB 28 Apr 75 +
Discriminator, quartz crystal WA0JYK 67 Oct 75 +
Distortion in fm systems W5JJ 26 Aug 69 +
DTMF controller for repeaters WB4FXD 47 Sep 85 +
Encoder, combined digital and burst K8AUH 48 Aug 69 +
European vhf-fm repeaters SM4GL 80 Sep 76 +
External frequency programmer (HN) WB9VWM 92 Apr 79 +
Filter, 455-kHz for fm WA0JYK 22 Mar 72
FM advantage WA9GDZ6 38 Sep 84 +
Fm demodulator using the phase-locked-loop KL7IPS 74 Sep 78 +
Fm demodulator using the phase-locked-loop Comments Anderson, Leonard H. 6 Apr 79 +
Fm demodulator, TTL W3FQJ 66 Nov 72
Fm receiver frequency control (letter) W3AFN 65 Apr 71
FM repeater separation : 20 kHz, Yes, 15 kHz, No WD5IBS 12 Aug 85 +
Fm techniques and practices for vhf amateurs W6SAI 8 Sep 69
Fm techniques and practices for vhf amateurs Short circuit 79 Jun 70 +
Fm transmitter, solid-state two-meter W6AJF 14 Jul 71
Fm transmitter, Sonobaby, 2 meter WA0UZO 8 Oct 71 +
Fm transmitter, Sonobaby, 2 meter Short circuit 96 Dec 71 +
Fm transmitter, Sonobaby, 2 meter Crystal deck for Sonobaby 26 Oct 72
Folded whip antenna for vhf mobile - Weekender WB2IFV 50 Apr 79 +
Forget memory (Ni-Cd discussion) K0OV 62 Jan 83 +
Frequency meter, two-meter fm W4JAZ 40 Jan 71 +
Frequency meter, two-meter fm Short circuit 72 Apr 71
Frequency synthesizer sidebands, filter reduces (HN) K1PCT 80 Jun 77 +
Frequency synthesizer, for two-meter fm WB4FPK 34 Jul 73 +
Frequency synthesizer, inexpensive all-channel, for two-meter fm W0OA 50 Aug 73 +
Frequency synthesizer, inexpensive all-channel, for two-meter fm Correction (letter) 65 Jun 74 +
Frequency synthesizers, 600 kHz offset for (HN) K6KLO 96 Jul 78 +
Frequency-synthesizer, one-crystal for two-meter fm W0MV 30 Sep 73 +
High performance vhf fm transmitter WA2GCF 10 Aug 76 +
I-f system, multimode WA2IKL 39 Sep 71
IC-230 modification (HN) W8PEY 80 Mar 77 +
IC-255A switching circuit (HN) WB6IQV 70 Jan 83 +
IC-255A switching circuit (HN) Comments, WA4MZZ 8 Jun 83 +
Identifier, programmable repeater W6AYZ 18 Apr 69
Identifier, programmable repeater Short circuit 76 Jul 69 +
Improved repeater/transmitter noise performance (HN) K1ZJH 104 Apr 86 +
Indicator, sensitive rf WB9DNI 38 Apr 73 +
Interface problems, fm equipment (HN) W9DPY 58 Jun 75 +
Interference, scanning receiver (HN) K2YAH 70 Sep 72
Linear translators WB6JNN 14 Sep 83 +
Logic oscillator for multi-channel crystal control W1SNN 46 Jun 73 +
Magnet mount antenna, portable (HN) WB2YYU 67 May 76 +
Microprocessor repeater controller KB5F 56 Apr 83 +
Mobile antenna, magnet-mount W1HCI 54 Sep 75 +
Mobile antennas, vhf, comparison of W4MNW 52 May 77 +
Mobile operation with the Touch-Tone pad W0LPQ 58 Aug 72
Mobile operation with the Touch-Tone pad Correction 90 Dec 72 +
Mobile operation with the Touch-Tone pad Modification (letter) 72 Apr 73 +
Mobile rig, protecting from theft (C&T) W1DTY 42 Apr 76 +
Modulation standards for vhf fm W6TEE 16 Jun 70 +
Monitor receivers, two-meter fm WB5EMI 34 Apr 74 +
Motorola channel elements WB4NEX 32 Dec 72 +
Motorola fm receiver mods (HN) VE4RE 60 Aug 71 +
Motorola P-33 series, improving the WB2AEB 34 Feb 71 +
Motorola voice commander, improving W0DKU 70 Oct 70
Motrac receivers (letter) K5ZBA 69 Jul 71
Multimode transceivers, fm-ing on uhf (HN) W6SAI 98 Nov 77 +
Narrow-band fm system. using ICs in W6AJF 30 Oct 68
Ni-cad charger, any-state WA6TBC 66 Dec 79 +
Phase modulation principles and techniques VE2BEN 28 Jul 75 +
Phase modulation principles and techniques Correction 59 Dec 75 +
Phase-locked loop, tunable, 28 and 50 MHz W1KNI 40 Jan 73 +
Power amplifier, rf 220-MHz fm K7JUE 6 Sep 73 +
Power amplifier, rf, 144 MHz Hatchett 6 Dec 73 +
Power amplifier, rf, 144-MHz fm W4CGC 6 Apr 73 +
Power amplifier, two-meter fm, 10-watt W1DTY 67 Jan 74 +
Power supply, regulated ac for mobile fm equipment WA8TMP 28 Jun 73 +
Preamplifier for handi-talkies WB2IFV 89 Oct 78 +
Preamplifier, two meter WA2GCF 25 Mar 72
Preamplifier, two meter W8BBB 36 Jun 74 +
Private call system for vhf fm WA6TTY 62 Sep 77 +
Private call system for vhf fm (HN) W9ZTK 77 Feb 78 +
Private-line, adding to Heath HW-202 WA8AWJ 53 Jun 74 +
Push-to-talk for Styleline telephones W1DRP 18 Dec 71 +
Receiver alignment techniques, vhf fm K4IPV 14 Aug 75 +
Receiver for six and two meters, multichannel fm W1SNN 54 Feb 74 +
Receiver for two meter, fm W9SEK 22 Sep 70 +
Receiver for two meter, fm Short circuit 72 Apr 71
Receiver isolation, fm repeater (HN) W1DTY 54 Dec 70
Receiver performance of vacuum-tube vhf-fm equipment, how to improve W0GGV 52 Oct 76 +
Receiver performance, comparison of VE7ABK 68 Aug 72
Receiver, modular fm communications K8AUH 32 Jun 69 +
Receiver, modular fm communications Correction 71 Jan 70 +
Receiver, modular, for two-meter fm WA2GBF 42 Feb 72
Receiver, modular, for two-meter fm Added notes 73 Jul 72
Receiver, tunable vhf fm K8AUH 34 Nov 71 +
Receiver, vhf fm WA2GCF 6 Nov 72
Receiver, vhf fm WA2GCF 8 Nov 75 +
Receiver, vhf fm (letter) K8IHO 76 May 73 +
Receivers, setup using hf harmonics (HN) K9MM 89 Nov 78 +
Relay, operational-amplifier, for Motorola receivers W6GDO 16 Jul 73 +
Remote base, an alternative to repeaters WA6LBV, WA6FVC 32 Apr 77 +
Remote repeater programming using a computer and a telephone KD9BC 89 Mar 86 +
Repeater antenna beam tilting K7NM 29 May 83 +
Repeater antenna beam tilting Short circuit 80 Jul 83 +
Repeater channel spacing (letter) WB6JPI 90 Jan 78 +
Repeater control with simple timers W2FPP 46 Sep 72
Repeater control with simple timers Correction 91 Dec 72 +
Repeater decoder, multi-function WA6TBC 24 Jan 73 +
Repeater etiquette (letter) W1OLP 8 Oct 83 +
Repeater installation W2FPP 24 Jun 73 +
Repeater Interference: some corrective actions W4MB 54 Apr 78 +
Repeater jammers, tracking down W4MB 56 Sep 78 +
Repeater kerchunk eliminator WB6GTM 70 Oct 77 +
Repeater linking, carrier-operated relay for K0PHF 57 Jul 76 +
Repeater problems VE7ABK 38 Mar 71
Repeater shack temperature, remote checking ZL2AMJ 84 Sep 77 +
Repeater transmitter, improving W6GDO 24 Oct 69 +
Repeater, high-tech: designing and building an FM translator WA6CAY 82 Feb 85 +
Repeater, receiving system degradation K5ZBA 36 May 69 +
Repeaters, single-frequency fm W2FPP 40 Nov 73 +
Repeaters, speech synthesis for N9EE 79 Mar 84 +
Repeaters, three circuits for (HN) N9EE 91 Jan 84 +
Reset timer, automatic W5ZHV 54 Oct 74 +
S-meter for Clegg 27B (HN) WA2YUD 61 Nov 74 +
S-meter, audible, for repeaters ZL2AMJ 49 Mar 77 +
Satellite receivers for repeaters WA4YAK 64 Oct 75 +
Scanner, two-channel, for repeater monitoring W8GRG 48 Oct 76 +
Scanner, vhf receiver K2LZG 22 Feb 73 +
Scanning receiver modifications, vhf fm WA5WOU 60 Feb 74 +
Scanning receiver, improved for vhf fm WA2GCF 26 Nov 74 +
Scanning receivers for two-meter fm K4IPV 28 Aug 74 +
Sequential encoder, mobile fm W3JJU 34 Sep 71
Sequential switching for Touch-Tone repeater control W8GRG 22 Jun 71
Simple scope monitor for vhf fm W1RHN 66 Aug 78 +
Single-frequency conversion, vhf/uhf W3FQJ 62 Apr 75 +
Single-sideband fm, introduction to W3EJD 10 Jan 77 +
Single-tone decoder WA2UMY 70 Aug 78 +
Solar powered repeater design WB5REA/WB5RSN 28 Dec 78 +
Speech processor for fm transmitters G4CLF, G3RZP 76 Mar 82 +
Squelch circuit, another (HN) WB4WSU 78 Oct 76 +
Squelch circuits for transistor radios WB4WSU 36 Dec 75 +
Squelch, smart W6NRW 37 Jun 83 +
Squelch-audio amplifier for fm receivers WB4WSU 68 Sep 74 +
State-of-the-art auto dialer K2MWU 21 Dec 83 +
State-of-the-art auto dialer Short circuit 10 Feb 84 +
State-of-the-art auto dialer Short circuit 10 Mar 84 +
State-of-the-art auto dialer Comments, WD9EIA 8 Feb 88 +
Subaudible tone encoders and decoders W8GRG 26 Jul 78 +
Synthesized channel scanning WA0UZO 68 Mar 77 +
Synthesized two-meter fm transceiver W1CMR, K1IJZ 10 Jan 76 +
Synthesized two-meter fm transceiver Letter, W5GQV 78 Sep 76 +
Synthesizer, 144 MHz, 800-channel K4VB, WA4GJT 10 Jan 79 +
Synthesizer, 144-MHz CMOS K9LHA 14 Dec 79 +
Telephone controller for remote repeater operation K0PHF, WA0UZO 50 Jan 76 +
Telephone controller for remote repeater operation Precautions (letter) 79 Apr 77 +
Telephone controller, automatic for your repeater K0PHF, WA0UZO 44 Nov 74 +
Test set for Motorola radios K0BKD 12 Nov 73 +
Test set for Motorola radios Short circuit 58 Dec 73 +
Test set for Motorola radios Added note (letter) 64 Jun 74 +
Time-out warning indicator for fm repeater users K3NEZ 62 Jun 76 +
Timer, simple (HN) W3CIX 58 Mar 73 +
Tone burst generator for European repeaters Comments, K2MWU 8 Feb 83 +
Tone burst generator for European repeaters WA3EEC 88 Jul 86 +
Tone encoder and secondary frequency oscillator (HN) K8AUH 66 Jun 69 +
Tone encoder, universal for vhf fm W6FUB 17 Jul 75 +
Tone encoder, universal for vhf fm Correction 58 Dec 75 +
Tone generator, IC Ahrens 70 Feb 77 +
Tone generator, IC (HN) W6IPB 88 Mar 79 +
Tone-alert decoder W8ZXH 64 Nov 78 +
Tone-burst generator (HN) K4COF 58 Mar 73 +
Tone-burst generator for repeater accessing WA5KPG 68 Sep 77 +
Tone-burst generator for repeater accessing Short circuit 94 Feb 79 +
Tone-burst keyer for fm repeaters W8GRG 36 Jan 72
Touch-tone circuit, mobile K7QWR 50 Mar 73 +
Touch-tone decoder KC9C 27 Apr 83 +
Touch-tone decoder, IC W3OG 26 Jul 78 +
Touch-tone decoder, multi-function K0PHF, WA0UZO 14 Oct 73 +
Touch-tone decoder, third generation WA7DPX 36 Feb 80 +
Touch-tone decoder, third generation Short circuit 67 Sep 80 +
Touch-tone decoder, three-digit W6AYZ 37 Dec 74 +
Touch-tone decoder, three-digit Circuit board for 62 Sep 75 +
Touch-tone encoder W3HB 41 Aug 77 +
Touch-tone hand-held K7YAM 44 Sep 75 +
Touch-tone handset, converting slim-line K2YAH 23 Jun 75 +
Transceiver for two-meter fm, compact W6AOI 36 Jan 74 +
Transmitter for two meters, phase-modulated W6AJF 18 Feb 70
Transmitter, two-meter fm W9SEK 6 Apr 72
Tunable receiver modification for vhf fm WB6VKY 40 Oct 74 +
Two-meter synthesizer, direct output WB2CPA 10 Aug 77 +
Two-meter synthesizer, direct output Short circuit 68 Dec 77 +
Up/down repeater-mode circuit for two-meter synthesizers, 600 kHz WB4PHO 40 Jan 77 +
Up/down repeater-mode circuit for two-meter synthesizers, 600 kHz Short circuit 94 May 77 +
Vertical antennas, truth about 5/8-wavelength K0DOK 48 May 74 +
Vertical antennas, truth about 5/8-wavelength Added note (letter) 54 Jan 75 +
Weather monitor receiver, retune to two-meter fm (HN) W3WTO 56 Jan 75 +
Whip, 5/8-wave, 144 MHz (HN) VE3DDD 70 Apr 73 +
ZIA connection: a multi-state 2-meter repeater link K5XY 30 Oct 86 +


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