General Technical Info


Three Diode Negative Peak Limiter

The Aircheck Tape - An Audio QSL & Reception Report by Paul Courson, WA3VJB.

Mic Amp by Bill, N2WXJ

70E8 PTO - How to Renew the Dessicant Pack by Paul Courson, WA3VJB.

IERC Tube Shields for the R-390A by Chuck Rippel, WA4HHG.

The Seven Deadly Caps - 75A-4 Repair and Restoration Tips  by Chuck Rippel, WA4HHG

A Quick and Not So Dirty Path To High Fidelity Audio by Steve, WB3HUZ

The R-390A Owners Manual by Chuck Rippel, WA4HHG  (Text version- use if you want to print it out.)

A Zener Diode Negative Peak Limiter by Steve, WB3HUZ

An Amazing Transformation (How to make a Mod Transformer from a TV Power Transformer) by Tim Smith, WA1HLR

Simple Antennas for Ten Meters by Steve, WB3HUZ

Oscilloscope Modulation Percentage Measurements Working Aid

An NE602 Balanced Modulator

Low Distortion Detector

813 Transmitter Schematic - this is the famous (or infamous) ZEQ/JJ rig.

Two-element Yagi for 10 Meters by Tom, K1JJ

Another Low Distortion Detector by Rob, K2CU

Centralab Couplate Info TNX to John, WB5OAU

Grounding for Amateur Radio Stations by Bob, K4TAX

An Improved Three Diode Negative Peak Limiter by Steve, WA1QIX

Improved Ionospheric Propagation With Polarization Diversity, Using A Dual Feedpoint Cubical Quad Loop by George, AB2KC

Lightning Protection by Bob, K4TAX

Johnny Novice's Guide to Receivers by John, W3JN

Series Modulated 807 by Bob, WB9ECK

The Slab Bacon's "Receiver Road Test" by Frank, KB3AHE

A Modulator for Rice Boxes by Bob, K1VUB (details for Ten Tec Paragon)

Getting on 160 Meters - Without a Full-Sized Antenna  by Steve, WB3HUZ

Enhanced AM by George, W2WLR (tnx K4KYV)

Johnson Navigator Meter Face Graphics  tnx to W2FAL

Specification Sheet for 4-1000 Triode Connected Grounded-Grid Service

Tube Limter from 1957 Radio & Television News, tnx to WQ9E 

 Anode Materials from 1935. Good info on the plates in our transmitting tubes. Tnx to K5PRO. 

 HT-32 Restoration by Ken, K6FC

 Ranger Restoration by Ken, K6FC

Taylor Super Modulation from 1948 Radio & Television News, tnx to WQ9E: Part 1 and Part 2

National MB-40SL Mult-Band Tank Manual tnx to W2ICQ

Performance of Short Antennas - (verticals) from the IRE in 1947, tnx to K5PRO

 Solid State HV Rectifiers - design criteria from the IRE Transactions on Broadcasting, Vol BC-7, 1961, tnx to K5PRO

New Notes on Restoring a National NC-300 by Ken, K6FC



15 December 2011

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