73 Amateur Radio Today – May 1961 Issue
Issue Contents:
G4 Zed Smith
– A tri-bander without loading coils or traps can be tuned from the shack! …… W8VVD 9
Feedline Economy
– Open-wire line just may become popular again after you read this one …… W9HOV 18
Propagation Special Feature
– Taking a look at sunspot numbers with an eye to predictions …… K2IGY 20
Testing the KT-200 Receiver
– Next month we have some of Bill Orr’s ideas for modifying this receiver …… K2DHA 22
Ham Calendar
– Just what we’ve been needing. Should go nicely with a 35 hour clock …… K4YNO 25
Build a Vary-volt
– A piece of test equipment that is worth its weight in something or other …… W2WYM 26
Moonstruck
– Eyewitness account …… W8GUE/6 28
Moon Chart
– How to get radio signals back from the moon reduced to a chart …… K2TKN 31
Sideband Exciter
– What with Turret construction and a simple circuit you may try this one …… W2NQS 32
Testing the Knight GDO
– Porsche-pushing ham tests Knight GDO likes it tells all …… W2OKU 35
Propagation Charts
– What time to where when on what bands… Probably …… K2IGY 36
Custom Resistors
– How to move precision resistors to the value you need …… Pafenberg 38
AC Calibration of Your VOM
– We’ll be giving you more and more on precision and calibration …… Bentley 40
Ohms by the Yard
– This ties in with the precision resistors on page 38 …… K5JKX/6 41
Blowers
– What size blower you need to keep a cool rig …… W3KET 42
How Low The Fi
– Our technical article: examining the audio stages of your receiver …… Staff 44
73 Amateur Radio Today – May 1961 Issue
