amateur existence (first license 2BAV in 1923J
I relied on reports from other amateurs on the air for modulation checks. The usul>; receiver does not do a good job at all, as you probably know by experience. W hat does do a good job is a hand> -dandy assembly as shown in Fig. 5. This set-up with a long pointer knob for good resolution between 46 mc and 50 mc makes a very useful piece of test equipment Do not use a regular tube type of amplifier. The padded earphones are also a must It's very simple, With your ears shielded from your own voice as far as sound goes, a good bit of audio gain, you can hear exactly what you sound like, right in your own shack, using a dummy load if you wish. Note that you are listening to yourself on a receiver and you can hear any hum, distortion, feedback, etc., can be heard instantly. You cannot pick up frequency drift or FM on such a receiver, but you can check those on a regular communications receiver-
This rig has been used so far with the four element beam shown in Fig. 6, This is a little firecracker and really pushes the signal up about ten times in power (10 db) in one direction while taking it away from another one, of course. 1 just took the beam down and measured it with a steel tape to make sure the dimensions were exactly correct. If you make it exactly as shown, it will have the same power gain. Its shown as a rigid array, but you can adapt it to portable use with folding joints without too much trouble.
Up to now, Ive been using 15 feet of TV" masting out on the roof with an armstrong rotator handle just outside the window, il works fine and Tm having no end of fun with it
So Im on six meters again, and have chatted with dozens of old friends, and, I hope, made some new ones. I haven't moved out n) the shack while building this rig, which means (hat my junk pile may be a little more extensive than some, after all, it does cover 45 feet long of cellar space, but 1 did look into the catalogues and add up the amateur net prices of the components for you.
It actually is possible to get on the air with VFO (this is very important. Ordinary V 'O asemblies can be expensive) and 50 watts out for $50.
LK 7 turns airwound, 16 turns per inch int diameter. B & W 3003, Air Dux 4I6T,
L2. 6 turns of plastic covered No. 22, Vi in. O.O,, % in. long Inside LI.
L3< 2 in. of i/2 in. dia, 32 turns per in. B & W 3004, Air Dux 432T,
L4h 15 turns of No. 28 dcc wound on cold end of L5, L5. 13 turns airwound 8 tpi,
L6. 2 turn adjustable link over cofd end of L5,
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