vacuum relay

Soft copper Tube Loops - Air conditioning soft copper tubes are perfect for loop construction. If you want to try a loop you must have an air variable capacitor or a vacuum variable capacitor. Article by PY1AHD

F8JZR Morse keys collection - Telegraphy collection, telegraph, sounder, relay by F8JZR in french

Glowbugs Times - Homebrew Tube Projects, Vacuum Tube Data, Articles From Old Handbooks

The VE3TO Radio Beacon Transmitter - The VE3TO beacon transmitter is a hybrid, consisting of both modern solid state and old vacuum tube technology working on 10132.0 kHz

Coconino Amateur Radio Club - The Coconino Amateur Radio Club, focused in Northern Arizona, is a Special Service Club of the American Radio Relay League (ARRL), and a member of the Amateur Radio Council of Arizona (ARCA)

K3LV Lebanon Valley Society of Radio Amateurs - LVSRA has been affiliated with the American Radio Relay League since 1930 and was incorporated in 1977 for the purpose of information exchange, to promote radio knowledge. Lebanon County Pennsylvania

RVARC Rappahannock Valley Amateur Radio Club - The RVARC is a Fredericksburg, VA area 56 year affiliated club with the American Radio Relay League, ARRL.

Vacuumschmelze - Manufactures inductive components for telecommunications and power electronics applications.

Telepost - Digital Vector Wattmeters, Dummy loads, software defined panadapter systems, SteppIR Tuning Relay, Digital SWR meters, LP-Pan Pan Adapter IQ Decoder for SDR based panadapter system

GE Digital Energy - Relays, controllers, power meters, fault recorders, power sensing products

Yaesu FT-102 page - Relay substitution tutorial, power amplifier tuning and Technical Characteristics

ICOM IC-706MKIIG Tech Note - If your IC-706MKIIG will not power up without even hearing a relay click, check the state of the HV line.

Ten-Tec Jupiter 538 Repair - Low-pass filter relay and reverse polarity repair notes by VE7TK

Electronix Express - Online shop for all electronics needs. Cables, Buzzers all kind of electronic components capacitors, inductors, relays, resistors crystals transformers, hardware like knobs screws nuts and washers, opto electronics, diodes and transistors, soldering desoldering products, test equipmemt and tools

RF Relay Store - RF Coaxial Relays from stock is the answer to your urgent small quantity needs.

DERF electronics corporation - Distributor of electronic components like diodes Transistors Microcontrollers Microprocessors connectors, switches, relays, integrated circuits, eproms, leds

SellWeb  ^updated - Electronic components online shop, resistors capacitors cables diodes transistors ic sockets relays microcontrollers PCB prototyping switches potentiometers

Increasing Amplifier Relay Speed - Article describes a circuit that accelerates the coil of DC relays by momentarily doubling their voltage.

Power Gride Tubes - Article on tubes and their usage in power amplifiers design. Explain failures of tube in RF power amplifiers, a common problem in the SB-220 SB-221, TL-922 and other amplifiers.

Remote antenna switch - A remote antenna change-over switching using relay powered over the coaxial feeder

Remote Coax Switch - 6x2 coaxial remote antenna switch, completed unit showing weatherproof relay box and station control unit.

High power amplifiers by pass relays  ^updated - These relays are only to be used for output power who exceeds conventional antenna relays specifications.

Lightning Protection using Relays - Why relays won't disconnect your antenna from your radio in lightning events

Vacuum tube regenerative receiver - How to build your first vacuum tube regenerative receiver

Vacuum tube liquid cooling system - This article describes an alternative to water as the cooling liquid for amateur radio vacuum tube power amplifiers. This cooling system is designed for adequate vacuum tube cooling, reasonable cost, and very low maintenance. By K8CU