Greetings Ed!
EV>>> CB'ers were Licensed to USE their Radios, NOT EXPERIMENT with them.
RW>>> CBers were licensed to use their radios in a manner complient
RW>>> with the FCC's Part 97 rules. Not many did. And, what's the use
EV>> Part 97???????? Part 15!!!!!!!!!!!!!!
RW>> None of the above. Part 97 was a typo on my part. Part 95,
RW>> Subpart D covers the Citizens Band (CB) Radio Service. The
RW>> present rules state that one can use a previously issued
RW>> license to operate on CB channels although no license is
RW>> required. That must mean that they keep records going as far
RW>> back as 1959, so I could use my 18W call or my favorite call,
EV> The only FCC Part I could think of was the one for 100 milliwatt
EV> walki-talkies Part 15.
That wouldn't cover CB walkie talkies, since they run over one watt of
power.
EV> Sorry, but since I've never been licensed under Part 95 and haven't
EV> read any CB literature in a L O N G time I used the wrong Part
EV> number. -snip-
That's ok. 8^)
RW>>>> When you get an education in 'antenna theory', a balun or a
RW>>>> gamma match is so much easier to fab and put into service.
EV>>> This topic caused me to remember a friend showed me his 6 Meter
EV>>> antenna with a BETA MATCH instead of a GAMMA MATCH on it. It was a
EV>>> Hy-Gain antenna.
RW>>> Why not build one that doesn't need either?
EV>> That's a Long Wire or Dipole isn't it? Or using Open Wire Twin Lead?
RW>> No, most sixers use verttical antennas, so a ground plane will
RW>> do...the business or commercial radio service uses vertical
RW>> antennas too.
EV> In my area 4 Land and 9 Land 6 Meter Antennas were the Halo or Saturn
EV> horizontally polarized type, although I did use my Sixer in the 1965
EV> Ford Custom 500 by unplugging the AM Radio antenna cord and with a
EV> adapter from it to PL-259 slde it over the SO-239 connector on the
EV> back of my Sixer. I also used a Inverter Power Supply for it, do You
EV> remember those BUZZING things?
In California, six is mostly verticle and the business portion of that
band is also verticle. BTW, we called the DDRR antenna built for CB a Halo
antenna.
EV>>> To me the Beta Match looked simpler to adjust so I got one for
EV>>> myself.
EV> The Beta Match is Two Parallel Rods with a piece of metal that slides
EV> along the Rods to adjust the antenna.
RW>>> My entire being was interested in building my own antennas,
RW>>> rather than talking about it.
EV>> 40 meter Dipole, 20 meterInverted Vee, 80 meter Slinky are the only
EV>> antennas I've built.
EV> I forgot to mention the 2M J-Pole and 2M SO-239 Grond Plane I've
EV> made. Memory is not my strong point anymore, if it ain't written down
EV> I forget.
I forget things like that too, until somebody mentions something that
rings a bell.
EV> I ought to carry a cassette recorder with me as one of the Pastors I
EV> knew of did, to record my thoughts as I think of them.
I have a personal recorder, but it isn't a cassette recorder, it's a
digital recorder less than the size of a pack of smokes.
EV> One trick I will use is if I was at Your QTH and told You when I got
EV> home I'd get something for You to bring the next time we met, is to
EV> ask to use your telephone. I would call my home number and leave a
EV> message on the Answering Machine about what I said I would do, so
EV> when I came in my house I would see the LED Blinking on the machine
EV> and listen to the call(s) on to remind me what I said, because when I
EV> walk through my doorway I am in my own little world, and have
EV> forgotten everything going on in the outside world. But You and the
EV> Rest here already know that. HI!
LOL! You shouldn't forget much, since you write it down here...
RW>> I've had a use for 40 inverted V many years ago. It was also my
RW>> 80m antenna with coils to make it electrically longer. In any
RW>> case, it was center fed and there was a center feed piece that
RW>> was manufactured by some antenna guru back then that allowed a
RW>> 50ohm coax to feed it without any matching device.
EV>> I also used a Vertical for 80 and 40 and a 2 meter Cross Yagi Beam
EV>> that I ordered through the mail.
EV> -snip-
RW>> I don't suppose that you've ever heard of a Gizmochie
RW>> antenna...it was a vertical/horizontal yagi that when viewed
RW>> from the end, looked like the Empire's Star Fighter. See
EV> I never heard the word but I seem to recall seeing the Trianglar
EV> Antenna mounted on some CB'ers homes.
Yes, they were manufactured and sold commercially, we just copied and made
them better.
RW>> illustration below. It required two sections of feedline from
RW>> the shack to the gamma matches on the verticle and the
RW>> horizontal (actually at 120 degrees from verticle) elements. I
RW>> built one four element beam and a buddy of mine copied it, but
RW>> stacked two of them together with one of the horizontal
RW>> elements missing so that they'd fit on the cross boom he made
RW>> for it. Thus!
RW>> I I I
RW>> Have a day! o o--+--o
RW>> / \ / \
RW>> We also built a DDRR antenna for experimental purposes. I don't
RW>> remember what happened to that one, but it worked good on a
EV> I'd have to look that one up, never heard of DDRR B4.
The DDRR Antenna
The DDRR (Directional-discontinuity Ring Radiator), vertically
polarized antenna....
The DDRR illustration in the 1967 Radio Amateurs Handbook shows two
wire circles, the top wire being an open circle and the bottom as a
closed circle. One end of the open circle attaches to the bottom
circle as H in the formula. The feedpoint is X distance from the
open wire attachment, fed with RG-8/u, shield to bottom circle. The
illustration also shows a grounded point on the bottom circle, which
means it is attached or laid on the ground. Not required as the
antenna we made was grounded by the vehicle body.
Length (circumference) around the top (open) or bottom (closed)
wire, in feet, L = 252/f(Mhz) (IE; 64.7 feet for 3.9Mhz).
Height, or spacing between the two elements; H=8.5/f(Mhz) (IE; 2.2
feet at 3.9Mhz).
The feedpoint distance, X, is given approximately by X = 28/f(Mhz).
(IE; 7.2 feet at 3.9Mhz.)
My notes from the experimenting we did (c1969) on 11 meters shows
the wire lengths L to be 9' 3 5/8", the spacing H to be 3 3/4" and
the feedpoint X at 12 3/8"..the experiment was figured for 27.1Mhz...
:) This antenna was mounted in the back of a El Camino. It
performed very well, although it had a high wind resistance and
needed to be guyed so it wouldn't blow over at 65mph...
This kind of antenna experimenting is what brought me to Amateur
Radio in 1970...now that I could work VHF and UHF, the antennas I
built were much easier to handle...
And you guys thought CB'ers were nothing but skip talking truckers
and hillbillies...
Anybody interested in building UHF stacked Quagi's, let me know..
Have a day!
R\%/itt - K5RXT
Being judged by McJerkey doesn't define who I am, it defines who he is.
--- GoldED+/W32 1.1.5-31012
--- D'Bridge 3.99
* Origin: HAM Radio, aka Amateur Radio. 804? Over! (1:387/22)
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