The final MAG LOOP will be
this setup.
I turned the antenna upside-down, and my expirience say, that this is
the best setup.
The received noice is 20 db lower, and comparred with
another HAM on WEBSDR in
Holland, say signal is 6 to 10 db less than a
full size antenna.
Now, I still have some
noice-problem.
When I switz the power on to the REMOTE, I get clearly a increces noice,
so have to
find the problem there.
I also have to figure out, how to the remote wire must go down to the shak.
In this setup it is
more easy to find the perfect match-point for the feeding-loop,
placed
in the buttom of the loop.
The antenna is directed NORTH - SOUTH.
My ruff is made of steel,
making a good ground for any kind of antenna, and I am realy
exited to
put the MAG LOOP on my ruff on this spot, but the wether must be
dry.
The MAG-LOOP will then be about 6 meter higher op then now on the
ground.
| (CVV) UCS-375-16 | rated | Permanent front flange, | US$ | |
| 10 - 375 pF |
16kv
(20kvp)
|
55 amps | 1/2" shaft |
985.00
|
Measured: MAX: 381 pF
Measured: MIN: 10 pF
Lenght: 217 m.m. without STUB for the shaft
Width: 75 m.m.
Video: The finished REMOTE STEERING of the VACUUM Condenser (YOUTUBE)
Used in German figther-fly to correct the kurs.
This engine have a very
fine GEAR, using 24 Volt and 75 watt,
it must be abel to turn the VACUUM-Condenser.
Now, must get it to fit.
Need a little cleaning before use.
Cleaning is DONE!!!
Wave-guide cabel:
I got 6 meter for free...
There was some grizy stuf between the isolation and the cobber.
Easy to remowe with Terpentine.
This cabel is very light and still flexible and strong.
Here just supported with some STRIPS...
I will have the
VACUUM-condenser mounted in the bottom, and make the the feed-point and
match at the top.
The bottom-mount of VACUUM-condenser will lower the weight-point, and make it possible to experiment.
Now... Have to do some motor-experiments...
Servo stearing of the LOOP-Antenna
Planning the Stearing:
B = LOOP Connecting point 2
C = Vacuum Condenser
D = PLEXIglass Wahl, 2 pcs.
E = 10-turn Potentiometer, for frequensreading scala on instrument
F = 1:2 Gearwheel
G = Insolatated driveaxel with m.m. gevind
H = Clutch
K = KURSMOTOR
L = Electric connetion Point
M = PLEXIglass mounting rod
VACUUM Condenser, a Gearwheel F:, 1:2 lower the 16 turn of Vaccum-Condenser to 8 turn on the E: 10 turn-Potentiometer, used to show a scala for relativ frequens, and to kipe an eye on where we are on the
VACUUM-Condenser.
The future plan will be, that a
PIC-processor will take care of logik, start and stop of K-motor,
mounted
in a steeringbox in the shack. The
PIC-processor will be able to "know" where it is, and how long
to the STOP-point.
Addition to this project would
be, to put a display on the control-box, READ the frequens, and auto-TUNE the
LOOP-antenna. The
PIC-processor would be able to read tuning frequens, knowing last frequens, then
change
motordirection to new frequens, change motor-speed from FAST to SLOW, and make a
full STOP with the best
SWR. This will be possible,
if I can find a way to pull out the SWR-signal from my SPE ITALIEN EXPERT 1k-fa,
QRO-transmitter.
Always good to have a PLAN... We must se what the time will bring....
For the moment I am working on the LOOP-Connection point 1 and 2.
DONE!
Her is the PLAN-SETUP.
Nothing is finished yet, but only the plan.
The board of plexi-glass is 42 cm long, and 10 cm width.
The gearwheel just fit...
Still to come -
1: The insulated axel between VACUUM-Condensator and the KURSMOTOR
2: The holder of the KURSMOTOR
DONE
Holder of the KURSMOTOR could bee like this:
Material: PLEXI-GLASS 14 m/m
Just to get a pic. of kobber, with indside diameter of a half inc. 22 m.m. kost me
90 D.kr. ( 18 US$ ), to fit on the TOP
of Vacuum-Condenser, is a lot of money for
nothing.
I hope it is worth it...
In TOP of PAGE you will find a video of the finished remote steering af th vacuum-condenser.
No I just have to VATERPROFF the BOX before I make the LOOP-Antenna.
 |
Experimenting
with REMOTE CONTROL, the beginning...
This is the way I
made the REMOTE-Control for the
The KURSMOTOR need
a supply-current on the stator, Therefor I put 2 stabiliced regulators in the box.
The crosswired switch is selecting left and right motor-run. The push-button after the 7805 regulator, ingage the motor. The voltmeter
gives me a scala - 5 - for the VACUUM- Simpel but working. It will be fun to se what frequens the LOOP can span over. |
I used an old box from
another project, with a meter build in, and some hulls in the
frontplade.
The 500 Volt meter will
later be calibrated with frequens-bands. An inside resistor
is removed,
and the full scala is 1 mA.
Black NOP is a 1K
potentiometer to vary the voltage to the KURSMOTOR from app.
5 Volt to
21 Volt.
Right to the POT. is POWER-ON button.
In the bottom-left is
the cross-coubled switch for LEFT/RIGHT turning af the
KURSMOTOR, and
the PUSH-BOTTON in the right corner is "INGAGE the MOTOR".
