73 Amateur Radio Today – July 1972
Issue Contents:
Modern VHF Counter
– Part 2 of 3. This will be followed by a frequency synthesizer as part of the system …… K2OAW 5
Solid State VHF Amplifier
– FM again? Well actually any VHFer should enjoy building th is experimental amplifier. Looks ideal to beef up the new International Signal rigs …… W9ZTK 15
The Phased-lock Loop
– Hey read this and snow everyone on 3999 with your tremendous technical knowledge. The P-l-l is here to stay so you might as well come to terms with it. The terms are easy …… K4ZFD 19
VHF Converters
– Dual gate Mosfets the best thing since DUZ? …… W8RHR 23
Add $15 T-power
– Vibrators are out right? So here’s a replacement to help you get that old kluge FM rig on the air …… WB2BJN 31
1296 MHz Mixer
– Don’t sneer odds are you’ll be looking back on this article in a year or so when you start thinking 1296 seriously …… WB2YVY 33
Thick Film R-f Pre-amplifier
– For any band really – but great for FMers …… K9STH 45
The Heath IB-102 Prescaler
– The 73 Tech Ed checks it out. Likes …… W4FQM 63
The VHF Specialists FM Amplifier
– Ten in fifty out for 2m FMers …… K1NUN 69
71 Meteor Shower DXing
– Real easy way to work 50 states on 2 meters. Haw! …… W5KHT
Tone Decoder and Carrier Relay Circuits
– Using the 741 op amp. Face it fellows the 6SN7GT is no longer state-of-the-art and you might just as well start reading these op amp and phased lock loop articles without gnashing your teeth …… K2OAW 83
Flying Spot Scanner for SSTV
– Solid state unit simple relatively. Are you going slow scan right now or going to wait and miss a lotof fun you could have had ? …… WB8DQT 89
Active Filter Design Part II
– Another chapter in the exciting “Filters Can Be Fun” series. Don’t miss the madcap ending next month …… K3PUR 97
73 Amateur Radio Today – July 1972
