super regenerative tub

Shortened vertical antenna for 7 Mhz - A simple drawing of a shortened antenna for 40 meters by using a PVC tube

A Q&D Multiband Antenna - A brick, some PVC tubing and a few other common hardware store items can be transformed into an effective Quick & Dirty RF-launcher—for less than $25! By Michael Atlas, N7FC

Shortened antennas - Drawings of shortened antenna for indoor usage, using short pvc tubes for 2 , 20 and 40 Mhz by f1rfm

YouTube : AO-51 Videos - Videos of AO-51 operations. Randy K7AGE has produced a number of practical and useful videos including good info on a minimal antenna setup for AO-51 reception.

Mmicronetics - Electron tubes / valves NOS and new production

Olivia, the Magic Digital Mode - Olivia MFSK digital communications are becoming popular in amateur radio because Olivia is one of the most robust methods of text keyboarding, that can perform superbly for long distance communications. Olivia frequencies, format and software

Technical books online - Downloadable Amateur Radio Tube related technical books free of charge and ready to download.

Altana Tubes - Brazilian vacuum tube, capacitors, transformers, plugs and connectors, resistances dealer

Vacuum Tubes, Inc. - Worldwide sellers of vacuum tubes and electron tubes for audio, radio, and industry

TubesWorld - Dealer for valves and semiconductors

Ask Jan First Electron Tubes - German vacuum tubes dealer

Antique electronic supply - Vacuum tubes, accessories and products for antique radio restoration

Tube World - Your one-stop source for high quality new old stock vacuum tubes.

QRO-Parts.com - Svetlana tubes also Russian capacitors,vacuum and coaxial relay, for RF Power Linear Amplifier builders. Amateur-Radio, Broadcast. Full Online Catalog.

Super Check Partial Database Files - Databases of contesters call-sign to be used with logging software The dta files can be used with CT, WriteLog, TRlog, SD, N1MM Logger, NA, Win-Test, and others

NJ7P Tube Database Search - This database contains data on thousands of tubes

Tube Data Sheet Locator - Resource for finding data on vacuum tubes.

Frank's Electron tube Pages - Tube databases in different languages

Tube Reference - Electronic Vacuum Tube Reference Manual & Specifications from the RCA Receiving Tube Manual.

Vacuum Tubes - This overgrown page covers all kinds of vacuum-tube electron devices, especially receiving tubes.

Military VT Tube Cross Reference - Rod's classic & Antique Radios

Fun With Tubes - Dedicated to passing on and preserving knowledge of vacuum tube circuits and techniques

rec.radio.amateur.boatanchors FAQ - Frequently Asked Questions - about vintage tube-type ham radio and communications equipment

EDUCYPEDIA Tubes datasheets

Blue Glow in Electron tubes