Electronic Kit for Amateur Radio Operator & Home Brewer from Korea(HL5FTC & DS5TUK)
2. Digital Frequency Display Module
6. Adjustment without measurement device
EHB-1 Assembly Guide 1. Super VXO.
EHB-1, the logic IC 74HC4053 & 74HC4066 is used. Prior to
assembly, schematics and PartListRev1.3 print and look nice bench in the place,
please be prepared. 100% of the entire operating principle is difficult to
understand. However, pins and how to connect the pins, and if you understand
what happens to the flow of signals, adjustment and repair process after
assembly will be very helpful. Please necessarily keep.
First Assembly of Super VXO progress. Super VXO really oscillating circuit,
consisting of the few parts, but here the oscillation signal generated by the
transmitting circuit and receiving circuit we need is the primary carrier.
Therefore, in order to create a clean signal without noise, it must be created.
First, to determine the PCB. PCB less than a spot of the copper corrosion is
visible, that is a short circuit between the pattern with the naked eye so that
you can see the parts thoroughly in advance to confirm.
Typically, the height from the lower parts of the insertion order of the high
parts, and soldering, and you will have to repeat the process.
In ELECHOMEBREW creating products, to reduce the size of the smallest components
like resistors 1/8W class is used. So, the resistor, the color band is difficult
to read with the naked eye. Check the eyes, and a resistance range tester to see
the value in the Hold it, please insert and solder.
The figures below are SuperVXO PCB. Is very small
Super VXO figure below that the most important role in the L2 coil.
If a typical kit, you direct you to wrap the, but the thickness
of 0.1 mm enameled wire nine times for each bank, all the exact
number of times, 45 times, a lot of winder in the correct
position is difficult.
The exact number of times winder in the correct position without
a large magnifying glass is not as easy as I've come, I Enclosure
a pre-wrap. I never even caught your hand directly on the bridge
were closed and not end up soldering wire enamel, which is an
operation that is not easy. Since more than happy to put a
pre-created content will pass.
When you are finished, the PCB assembly, wiring, are you in advance. Molex 3Pin 5264 volume connector cable harness to insert the following in the order shown below, 10KR VR is soldered to you. 10KR VR 1Turn VR and the 300 back also, as an option to apply for your 10Turn VR more than happy to put in your information, so accordingly by comparing the following two pictures, and if the wiring is soldered.
Pin 2 for 10Turn VR is the best in the back. So the position of the wiring is slightly different. Connect after checking the pictures.
CON1 and CON3 2Pin Molex 5264, each
housing red / black harness cable, putting, its location is combined with the
connector. Pin 1 is always look at the PCB side of the silk is cut corners.
Check if the number of pins on the wiring connections, please check again.
When you apply the 12V power level of about 20mA of current to flow normally,
when the assembly is busted.
Then, in Part 2 that describes the DFD assembled, CON2 connection of the
terminals to determine the frequency and you can make adjustments.
If you do not have DFD module, frequency counter, connect to the CON2 and VR can
check by turning the oscillation frequency. Variable range to be varied up to
approximately 11.000MHz ~ 11.040MHz L2 core of the coil bobbin is if you adjust
the core. If you are identified as DFD and displayed as a frequency 7.000MHz ~
7.040MHz to adjust to. DFD, and how to adjust the production method will be
explained in Part 2.
This confirmed a lower frequency and upper frequency value shown in the
following counters.
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