I start this series by introducing some basics about antennas, antenna tuners, antenna analyzers and noise / interference / QRM / QRN. Equipment used / menti…
Repairing and Rebuilding Antenna This is a 2 meter antenna freq. coverage of 135-160 mhz which makes it a good scanner antenna also SORRY !!! I SAID in video…
I have seen antennas like those used on repeaters before I don’t know
anything about how they work did you say if they are directional?
Good old Seal All great stuff saved me $200 junst for a part for my old
Chevy S10 had a gas line leak on my 89 s10 it was right over the motor it
was very hard to find but when I did I spent $2 for tube of this took some
gas line hose cut it down the middle spread that Seal All all over inside
put it on the line hose clamped it let it sit for a day took the claps off
it l;asted 10 years newver did leak from that day on. I use it all the time
now. The short line was not made anymore.
I have used clear spray on laquer on A99 and Big Stick antennas after
cleaning them with 000 or 0000 steel wool
I forgot to you can usewhite distilled Vinger with the steal wool it will
take little work to clean it up. i have helped C.Bers through the year with
everything from PDL2s,Moonrakers,the old Star Dusters I had 4 through out
the years alls took them down to clean them it helps on the RX. But you to
have some greta ways to don’t get me wrong.
No It’s Omni Directional Same as all ground plane Antennas they have very
little gain but there Cheap
we had to take the insie out of it to cut it to freqs. it has a VHF when we
got it but our friend at Motorola told us to use boat sealer it will last
for yeas & not be efficted by UV rays or weathering. It allso gives it
streath makes it stronger then even the stuff they use on the ant. when it
is made. I cant think what I use to hold things it is called something Weld
but it is a glue it will come off but it is strong to I just run it at the
top it take about 50LBS to pull it apart it will hold
Another way to protect the cleaned aluminum elements is to use plain old
paste car wax. Three coats should do it. Rub the paste car wax in, let it
haze and polish it. Do this 3 times and it’ll be pretty well protected. I
use that on my mobile antennas and they look new after being in all kinds
of weather.
I have used paste wax on antennas that had plastic on them like the Signal
Kicker and the AES Anteenna Sspecialist ones
Laquer is good it is cheaper then Boat sealer but we found that laquer
didn’t last as long as boat sealer laquer for 1 didn’t hold up to the UV
rays or the asicd rains the 1st rains of the year. I didnt know there was
0000 steal wool that wound be better yet to shine thins up allso with
laquer it has cemicels in it that do raise the SWR a little we found I
helped my buddies build a 220 repeater we were given a Motorola ant. made
of fiberglass it had been up for a few years had some weathering
a 18ft ant. at wind gust speeds of 65 mph easy I will post the name
tomorrow when I can dig it out.
I wound had to buy a whole new line from the ga tank to the carb & have 1
bent. But heres a good way to clean any antenna 000 steal wool a buddy of
mine does all his antennas every 3 years he has used steal wool for the
last 25 years cause it makes it look new and don’t take to much off. if u
take to much off it will make it so it will carode faster as far as the
fiber glass parts use what they use on boats I have done A99 ant. brought
them back life.
Thanks for posting, great info, mine is very tired too and needs a
rebuilding, 73’s Douglas KB6TWC
this amazing, rebuilt ur own antenne, can you info me,what is the diameter
of the antenna ring.if you can give much better
Thanks for going ahead with this series Martin it is very interesting for
me. As you said yourself it is great to refresh your memory. I thought that
the level of detail was perfect, not too technical by going into the
physics of it and not too simple where one doesn’t understand the
principals of antennas and how they work. Very well done, I am certainly
tuned in for more 🙂 ~ Jason
Yes, an antenna tuner can certainly be used with indoor antennas. Cheers,
Martin.
Is it possible to use an antenna tuner with an indoor antenna, e.g. Sony
an-lp1?
very clear and informitive u have another subscriber will have a look at
your other videos once i get the time well done regards mark
@dkaplan2005 Thanks for the feedback.
Thanks Mark.
here is my email brucet35@aol.com
@nikonman1161732 Thanks for your feedback. I hope the future videos will
help as well. Cheers, Martin.
thanks you very much…
Great video Martin!
Trying to learn some radio theory. Right now tuning.resonance.and found you
very helpful. thanks looking for more Brian,KB7MZY
ok i have a question, i have a kenwood at120 in my mobile the radio is a
10meter texas ranger rci-69ffc2 with a wilson 5000 antena on top of my ford
f350 the coax is lmr-400 now i had to rebuild the antenna and i have a 1.1
match on cb channel 1 and a match of 1.5 on channel 40 now i put the switch
on through when i matched this now im not sure how to use the r dial and
the x dial can you show me in a video what the effects are and explain to
me how to use these funtions? thank you wa1orp.
The best SWR would be = 0, but practically an SWR of 1 to 1.2 is very good.
Yes…South Africa is beautiful. Thanks for the post.
@TheSurvivalSecrets Hi Jason, I certainly appreciate that feedback. Cheers,
Martin.
Thanks for taking the time to make the video. It was helpful.
The antenna tuner should be physically placed between the antenna its self
and the coax that lead the radio signals to and from the antenna and the
radio. Then and only then it would really change the ANTENNAS electrical
characteristics. So why do we not do that? Because it is really
impractical! Remember, the coax is 50 ohms. So if the antenna is not
resonant to 50 ohms, there is going to be a mismatch where the antenna is
connected to the coax. Antenna efficiency is what we want! Not heat! 73
Hmmm. As I understand it, SWR = (Forward V + Reflected) V divided by
(Forward V – Reflected V) so if the Reflected V = zero that the SWR will be
unity. And that is what you are saying. I think that you may be thinking in
terms of SWR = Reflected V divided by Forward V however, in that case the
SWR could never be greater than unity.
My pleasure, thanks for the feedback.
@kimdaviscali Aaah…that it! 🙂 thanks!
Yes…sorry, I was getting my wires crossed….the best SWR would be 1:1 I
was thinking of: Gamma=0: no reflection, when the line is perfectly
matched, (wikipedia(DOT)org/wiki/Standing_wave_ratio)
Thanks for the feedback Cali. I hope to post another HAM related video this
week. Cheers, Martin.
@OrionTiger Thanks for your contributions good man!
@toddrharrison Thanks very much for that feedback it is greatly
appreciated. I hope the future videos continue to be informative and make
it a little more understandable than the text books. Thanks for watching.
I am going through your series right now and you are helping a lot. I am
relatively know to ham and having a hard time with it but I will continue.
Thanks again…
I appreciate the time and effort you have put in, I am finding it extremely
interesting and very helpful. Well done.