73 Amateur Radio Today – June 1970
Issue Contents:
A Practical DDRR Antenna
– Expensive difficult-to-build mediocre antenna …… W6WYQ 20
VFO Circuit
– In case you are tired of crystal control …… K0HVK 36
The Low-Noise Antenna
– High noise you’re looking for? …… WB6JNI 39
Experimental Remote SWR Indicator
– Experimental means we think it might work …… W2EEY 41
The Little Wonder: Mark 11
– Proving again that almost anything will radiate …… W5ZBC 46
CW Can Be Fun (With the Ord DK-1)
– if you know the code …… Staff 48
Two Receivers From One Antenna
– Without suckout (tsk) …… WA6UFW 49
Factors in Coaxial Cable Loss
– Like temperature and frequency …… W9KXJ 50
Improving Trap-type Vertical Antennas
– By adding an element …… W2EEY 52
Measuring Incident and Reflected RF
– It’s the difference th at counts …… VE7BS 56
Government Surplus Straight from the Horse’s Mouth
– Hay Hay! …… WA9ANW 58
QRP
– 40m with 40 mW …… WA3JBN 62
Ground Support for the Powder Puff Derby
– Public service and politics …… W7ZC 64
Coax Adapter VHF to BNC
– For 75 cents …… W9MEV 73
The Sly Beam
– 32 elements on 2 meters …… ZL4TAH 74
Three Unrelated Articles; Installing the Swan 250-c Noise Silencer; Measuring Rf Output; Useful Cable Clamps
…… WA6CPP 80
1/4 Wave Top-loaded Mobile Antenna
– F or 20 meters …… W5AZE 83
11 Element 2 Meter Circular Quad
– 9 dB forward gain …… W4KAE 86
The 633
– For 10 15 & 20 meters …… ZL2ASJ 92
73 Tests the Grundig Satellite Receiver
– Tunes in CW SSB FM and everything! …… Staff 97
104 De-rF Your VTVM
– Works better …… WA0FFJ
Getting Your Extra Class License Part XVII: Conclusion
– Now go! …… Staff 105
Special Antenna Catalog Section
– For your reference pleasure …… 117
More Accuracy on Microwaves
– Improvement on December wavemeter …… Goldstein 142
73 Amateur Radio Today – June 1970
